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Larch walls Black & White Stock Photos
. The fungal diseases of the common larch . Larches. THE HONEY FUNGUS 157 are delignified from the outside towards the middle lamella, leaving a layer of cellulose. Then the cellulose also is digested so that often whole walls disappear. The walls of the bordered pits are digested gradually and they often. Fro. 68.—Armillaria mellea. Transverse section of larch wood showing the 'black line' (x4.'50). crack through shrinkage in the process, and present various curious figures, some of which Hartig has drawn (1879). The wood never becomes honeycombed as it does with Fomes annosus or as crumbly a Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-the-honey-fungus-157-are-delignified-from-the-outside-towards-the-middle-lamella-leaving-a-layer-of-cellulose-then-the-cellulose-also-is-digested-so-that-often-whole-walls-disappear-the-walls-of-the-bordered-pits-are-digested-gradually-and-they-often-fro-68armillaria-mellea-transverse-section-of-larch-wood-showing-the-black-line-x450-crack-through-shrinkage-in-the-process-and-present-various-curious-figures-some-of-which-hartig-has-drawn-1879-the-wood-never-becomes-honeycombed-as-it-does-with-fomes-annosus-or-as-crumbly-a-image232033458.htmlRMRDE116–. The fungal diseases of the common larch . Larches. THE HONEY FUNGUS 157 are delignified from the outside towards the middle lamella, leaving a layer of cellulose. Then the cellulose also is digested so that often whole walls disappear. The walls of the bordered pits are digested gradually and they often. Fro. 68.—Armillaria mellea. Transverse section of larch wood showing the 'black line' (x4.'50). crack through shrinkage in the process, and present various curious figures, some of which Hartig has drawn (1879). The wood never becomes honeycombed as it does with Fomes annosus or as crumbly a
. The fungal diseases of the common larch . Larches. THE HONEY FUNGUS 157 are delignified from the outside towards the middle lamella, leaving a layer of cellulose. Then the cellulose also is digested so that often whole walls disappear. The walls of the bordered pits are digested gradually and they often. Fro. 68.—Armillaria mellea. Transverse section of larch wood showing the 'black line' (x4.'50). crack through shrinkage in the process, and present various curious figures, some of which Hartig has drawn (1879). The wood never becomes honeycombed as it does with Fomes annosus or as crumbly a Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-the-honey-fungus-157-are-delignified-from-the-outside-towards-the-middle-lamella-leaving-a-layer-of-cellulose-then-the-cellulose-also-is-digested-so-that-often-whole-walls-disappear-the-walls-of-the-bordered-pits-are-digested-gradually-and-they-often-fro-68armillaria-mellea-transverse-section-of-larch-wood-showing-the-black-line-x450-crack-through-shrinkage-in-the-process-and-present-various-curious-figures-some-of-which-hartig-has-drawn-1879-the-wood-never-becomes-honeycombed-as-it-does-with-fomes-annosus-or-as-crumbly-a-image216457508.htmlRMPG4DN8–. The fungal diseases of the common larch . Larches. THE HONEY FUNGUS 157 are delignified from the outside towards the middle lamella, leaving a layer of cellulose. Then the cellulose also is digested so that often whole walls disappear. The walls of the bordered pits are digested gradually and they often. Fro. 68.—Armillaria mellea. Transverse section of larch wood showing the 'black line' (x4.'50). crack through shrinkage in the process, and present various curious figures, some of which Hartig has drawn (1879). The wood never becomes honeycombed as it does with Fomes annosus or as crumbly a
. The fungal diseases of the common larch . Larches. HEART-ROT CAUSED BY OTHER FUNGI 131 of all degrees of thickness from 6/i downward, but some of the largest, in the earlier stages of rot, have brown contents. These thicker, brown hyphae generally rmi either vertically along the tracheides, or horizontally, boring through the tracheide walls and markedly constricted in the bore-holes. The finer hyphae, which are much more numerous, branch frequently and spread in all directions, though the bore- holes are nearly always transverse to the tracheide walls. Hyphae may also grow up between the tr Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-heart-rot-caused-by-other-fungi-131-of-all-degrees-of-thickness-from-6i-downward-but-some-of-the-largest-in-the-earlier-stages-of-rot-have-brown-contents-these-thicker-brown-hyphae-generally-rmi-either-vertically-along-the-tracheides-or-horizontally-boring-through-the-tracheide-walls-and-markedly-constricted-in-the-bore-holes-the-finer-hyphae-which-are-much-more-numerous-branch-frequently-and-spread-in-all-directions-though-the-bore-holes-are-nearly-always-transverse-to-the-tracheide-walls-hyphae-may-also-grow-up-between-the-tr-image232033624.htmlRMRDE174–. The fungal diseases of the common larch . Larches. HEART-ROT CAUSED BY OTHER FUNGI 131 of all degrees of thickness from 6/i downward, but some of the largest, in the earlier stages of rot, have brown contents. These thicker, brown hyphae generally rmi either vertically along the tracheides, or horizontally, boring through the tracheide walls and markedly constricted in the bore-holes. The finer hyphae, which are much more numerous, branch frequently and spread in all directions, though the bore- holes are nearly always transverse to the tracheide walls. Hyphae may also grow up between the tr
. The fungal diseases of the common larch . Larches. THE LARCH CANKER 27 The most marked development of the mycehum is located in the inner cortex and outer phloem. The hyphae grow freely in the intercellular spaces (which, as shown in Chapter 1, are especially large and frequent in the outer phloem) and the resin cj'sts, and send branches through the walls into the cells, and these branches ramify and pass from cell to cell. The hyphae are usually rather small in the inter- cellular spaces, and the branches which enter cells are broader. These larger hyphae have often a wavy outline, and cont Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-the-larch-canker-27-the-most-marked-development-of-the-mycehum-is-located-in-the-inner-cortex-and-outer-phloem-the-hyphae-grow-freely-in-the-intercellular-spaces-which-as-shown-in-chapter-1-are-especially-large-and-frequent-in-the-outer-phloem-and-the-resin-cjsts-and-send-branches-through-the-walls-into-the-cells-and-these-branches-ramify-and-pass-from-cell-to-cell-the-hyphae-are-usually-rather-small-in-the-inter-cellular-spaces-and-the-branches-which-enter-cells-are-broader-these-larger-hyphae-have-often-a-wavy-outline-and-cont-image216450313.htmlRMPG44G9–. The fungal diseases of the common larch . Larches. THE LARCH CANKER 27 The most marked development of the mycehum is located in the inner cortex and outer phloem. The hyphae grow freely in the intercellular spaces (which, as shown in Chapter 1, are especially large and frequent in the outer phloem) and the resin cj'sts, and send branches through the walls into the cells, and these branches ramify and pass from cell to cell. The hyphae are usually rather small in the inter- cellular spaces, and the branches which enter cells are broader. These larger hyphae have often a wavy outline, and cont
. The fungal diseases of the common larch . Larches. THE LARCH CANKER 27 The most marked development of the mycehum is located in the inner cortex and outer phloem. The hyphae grow freely in the intercellular spaces (which, as shown in Chapter 1, are especially large and frequent in the outer phloem) and the resin cj'sts, and send branches through the walls into the cells, and these branches ramify and pass from cell to cell. The hyphae are usually rather small in the inter- cellular spaces, and the branches which enter cells are broader. These larger hyphae have often a wavy outline, and cont Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-the-larch-canker-27-the-most-marked-development-of-the-mycehum-is-located-in-the-inner-cortex-and-outer-phloem-the-hyphae-grow-freely-in-the-intercellular-spaces-which-as-shown-in-chapter-1-are-especially-large-and-frequent-in-the-outer-phloem-and-the-resin-cjsts-and-send-branches-through-the-walls-into-the-cells-and-these-branches-ramify-and-pass-from-cell-to-cell-the-hyphae-are-usually-rather-small-in-the-inter-cellular-spaces-and-the-branches-which-enter-cells-are-broader-these-larger-hyphae-have-often-a-wavy-outline-and-cont-image232034044.htmlRMRDE1P4–. The fungal diseases of the common larch . Larches. THE LARCH CANKER 27 The most marked development of the mycehum is located in the inner cortex and outer phloem. The hyphae grow freely in the intercellular spaces (which, as shown in Chapter 1, are especially large and frequent in the outer phloem) and the resin cj'sts, and send branches through the walls into the cells, and these branches ramify and pass from cell to cell. The hyphae are usually rather small in the inter- cellular spaces, and the branches which enter cells are broader. These larger hyphae have often a wavy outline, and cont
. The fungal diseases of the common larch . Larches. HEART-ROT CAUSED BY OTHER FUNGI 131 of all degrees of thickness from 6/i downward, but some of the largest, in the earlier stages of rot, have brown contents. These thicker, brown hyphae generally rmi either vertically along the tracheides, or horizontally, boring through the tracheide walls and markedly constricted in the bore-holes. The finer hyphae, which are much more numerous, branch frequently and spread in all directions, though the bore- holes are nearly always transverse to the tracheide walls. Hyphae may also grow up between the tr Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-heart-rot-caused-by-other-fungi-131-of-all-degrees-of-thickness-from-6i-downward-but-some-of-the-largest-in-the-earlier-stages-of-rot-have-brown-contents-these-thicker-brown-hyphae-generally-rmi-either-vertically-along-the-tracheides-or-horizontally-boring-through-the-tracheide-walls-and-markedly-constricted-in-the-bore-holes-the-finer-hyphae-which-are-much-more-numerous-branch-frequently-and-spread-in-all-directions-though-the-bore-holes-are-nearly-always-transverse-to-the-tracheide-walls-hyphae-may-also-grow-up-between-the-tr-image216457609.htmlRMPG4DTW–. The fungal diseases of the common larch . Larches. HEART-ROT CAUSED BY OTHER FUNGI 131 of all degrees of thickness from 6/i downward, but some of the largest, in the earlier stages of rot, have brown contents. These thicker, brown hyphae generally rmi either vertically along the tracheides, or horizontally, boring through the tracheide walls and markedly constricted in the bore-holes. The finer hyphae, which are much more numerous, branch frequently and spread in all directions, though the bore- holes are nearly always transverse to the tracheide walls. Hyphae may also grow up between the tr
. Fundamentals of botany. Botany. Fig. 244.—Ectotrophic micorhizas. At left, mlcorhizal mantle on root of hickory {Carya ovata), in cross-section; at right, root-tip of an oak (Quercus), covered by fungus mantle. (After W. B. McDougall.) The mycelia either form a mantle or jacket at or near the surface of the young roots {ectotrophic, Fig. 244), or they penetrate through the cell-walls into the cell-cavities {endotrophic, Fig. 245). Recent careful studies seem to demonstrate that the ectotrophic mycorrhizas, common on the roots of many kinds of trees (hickory, oaks, birch, sugar-maple, larch, Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/fundamentals-of-botany-botany-fig-244ectotrophic-micorhizas-at-left-mlcorhizal-mantle-on-root-of-hickory-carya-ovata-in-cross-section-at-right-root-tip-of-an-oak-quercus-covered-by-fungus-mantle-after-w-b-mcdougall-the-mycelia-either-form-a-mantle-or-jacket-at-or-near-the-surface-of-the-young-roots-ectotrophic-fig-244-or-they-penetrate-through-the-cell-walls-into-the-cell-cavities-endotrophic-fig-245-recent-careful-studies-seem-to-demonstrate-that-the-ectotrophic-mycorrhizas-common-on-the-roots-of-many-kinds-of-trees-hickory-oaks-birch-sugar-maple-larch-image232396019.htmlRMRE2FDR–. Fundamentals of botany. Botany. Fig. 244.—Ectotrophic micorhizas. At left, mlcorhizal mantle on root of hickory {Carya ovata), in cross-section; at right, root-tip of an oak (Quercus), covered by fungus mantle. (After W. B. McDougall.) The mycelia either form a mantle or jacket at or near the surface of the young roots {ectotrophic, Fig. 244), or they penetrate through the cell-walls into the cell-cavities {endotrophic, Fig. 245). Recent careful studies seem to demonstrate that the ectotrophic mycorrhizas, common on the roots of many kinds of trees (hickory, oaks, birch, sugar-maple, larch,
. The fungal diseases of the common larch . Larches. 8 INTRODUCTION longer than the other, so that only one of a pair is cut across in a transverse section of some cushions. Immediately inside the cushions is a continuous cork layer, which kiUs the outer cortex and epidermis, and inside this again is the inner cortex composed of live cells, with intercellular spaces, somewhat thick cellulose walls, and living contents with chloroplasts. A narrow continuous layer of phloem surrounds the wood cylinder, and imme- diately outside the phloem are a few nearly • spherical resin cysts, which look like Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-8-introduction-longer-than-the-other-so-that-only-one-of-a-pair-is-cut-across-in-a-transverse-section-of-some-cushions-immediately-inside-the-cushions-is-a-continuous-cork-layer-which-kius-the-outer-cortex-and-epidermis-and-inside-this-again-is-the-inner-cortex-composed-of-live-cells-with-intercellular-spaces-somewhat-thick-cellulose-walls-and-living-contents-with-chloroplasts-a-narrow-continuous-layer-of-phloem-surrounds-the-wood-cylinder-and-imme-diately-outside-the-phloem-are-a-few-nearly-spherical-resin-cysts-which-look-like-image216450360.htmlRMPG44J0–. The fungal diseases of the common larch . Larches. 8 INTRODUCTION longer than the other, so that only one of a pair is cut across in a transverse section of some cushions. Immediately inside the cushions is a continuous cork layer, which kiUs the outer cortex and epidermis, and inside this again is the inner cortex composed of live cells, with intercellular spaces, somewhat thick cellulose walls, and living contents with chloroplasts. A narrow continuous layer of phloem surrounds the wood cylinder, and imme- diately outside the phloem are a few nearly • spherical resin cysts, which look like
. The fungal diseases of the common larch . Larches. HEART-ROT 97 preparations for making observations on these patches were obtained by first soaking sections in dilute HCl until bleached, then staining with safranin and mounting in Canada balsam. The hyphal walls, which were previously dark brown, readily absorb the saf- ranin, whilst those which were formerly colourless remain so. In sections mounted in this way the following details may be observed. As shown in fig. 35, the hyphae at the edge of the dark patch are easily distinguishable, though frequently two or three may be seen growing s Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-heart-rot-97-preparations-for-making-observations-on-these-patches-were-obtained-by-first-soaking-sections-in-dilute-hcl-until-bleached-then-staining-with-safranin-and-mounting-in-canada-balsam-the-hyphal-walls-which-were-previously-dark-brown-readily-absorb-the-saf-ranin-whilst-those-which-were-formerly-colourless-remain-so-in-sections-mounted-in-this-way-the-following-details-may-be-observed-as-shown-in-fig-35-the-hyphae-at-the-edge-of-the-dark-patch-are-easily-distinguishable-though-frequently-two-or-three-may-be-seen-growing-s-image232033813.htmlRMRDE1DW–. The fungal diseases of the common larch . Larches. HEART-ROT 97 preparations for making observations on these patches were obtained by first soaking sections in dilute HCl until bleached, then staining with safranin and mounting in Canada balsam. The hyphal walls, which were previously dark brown, readily absorb the saf- ranin, whilst those which were formerly colourless remain so. In sections mounted in this way the following details may be observed. As shown in fig. 35, the hyphae at the edge of the dark patch are easily distinguishable, though frequently two or three may be seen growing s
. The fungal diseases of the common larch . Larches. INTRODUCTION 11 m.r formation, wliicii leaves the inner cortex intact even in old stems. Two Idnds of specialized elements occur in this layer. The first are small cells set aside for the purpose of con- taining crystals of calcium oxalate. These ceUs are only found in older stems, and are very frequent in the neighbour- hood of cankers. The second are irregularly branched sclerenchymatous cells with very thick walls (fig. 6, s.e.). These elements grow longi- tudinally, forcing their way between the parenchymatous cells, and often branch. Th Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-introduction-11-mr-formation-wliicii-leaves-the-inner-cortex-intact-even-in-old-stems-two-idnds-of-specialized-elements-occur-in-this-layer-the-first-are-small-cells-set-aside-for-the-purpose-of-con-taining-crystals-of-calcium-oxalate-these-ceus-are-only-found-in-older-stems-and-are-very-frequent-in-the-neighbour-hood-of-cankers-the-second-are-irregularly-branched-sclerenchymatous-cells-with-very-thick-walls-fig-6-se-these-elements-grow-longi-tudinally-forcing-their-way-between-the-parenchymatous-cells-and-often-branch-th-image216450337.htmlRMPG44H5–. The fungal diseases of the common larch . Larches. INTRODUCTION 11 m.r formation, wliicii leaves the inner cortex intact even in old stems. Two Idnds of specialized elements occur in this layer. The first are small cells set aside for the purpose of con- taining crystals of calcium oxalate. These ceUs are only found in older stems, and are very frequent in the neighbour- hood of cankers. The second are irregularly branched sclerenchymatous cells with very thick walls (fig. 6, s.e.). These elements grow longi- tudinally, forcing their way between the parenchymatous cells, and often branch. Th
. The fungal diseases of the common larch . Larches. 8 INTRODUCTION longer than the other, so that only one of a pair is cut across in a transverse section of some cushions. Immediately inside the cushions is a continuous cork layer, which kiUs the outer cortex and epidermis, and inside this again is the inner cortex composed of live cells, with intercellular spaces, somewhat thick cellulose walls, and living contents with chloroplasts. A narrow continuous layer of phloem surrounds the wood cylinder, and imme- diately outside the phloem are a few nearly • spherical resin cysts, which look like Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-8-introduction-longer-than-the-other-so-that-only-one-of-a-pair-is-cut-across-in-a-transverse-section-of-some-cushions-immediately-inside-the-cushions-is-a-continuous-cork-layer-which-kius-the-outer-cortex-and-epidermis-and-inside-this-again-is-the-inner-cortex-composed-of-live-cells-with-intercellular-spaces-somewhat-thick-cellulose-walls-and-living-contents-with-chloroplasts-a-narrow-continuous-layer-of-phloem-surrounds-the-wood-cylinder-and-imme-diately-outside-the-phloem-are-a-few-nearly-spherical-resin-cysts-which-look-like-image232034115.htmlRMRDE1TK–. The fungal diseases of the common larch . Larches. 8 INTRODUCTION longer than the other, so that only one of a pair is cut across in a transverse section of some cushions. Immediately inside the cushions is a continuous cork layer, which kiUs the outer cortex and epidermis, and inside this again is the inner cortex composed of live cells, with intercellular spaces, somewhat thick cellulose walls, and living contents with chloroplasts. A narrow continuous layer of phloem surrounds the wood cylinder, and imme- diately outside the phloem are a few nearly • spherical resin cysts, which look like
. The fungal diseases of the common larch . Larches. HEART-ROT 97 preparations for making observations on these patches were obtained by first soaking sections in dilute HCl until bleached, then staining with safranin and mounting in Canada balsam. The hyphal walls, which were previously dark brown, readily absorb the saf- ranin, whilst those which were formerly colourless remain so. In sections mounted in this way the following details may be observed. As shown in fig. 35, the hyphae at the edge of the dark patch are easily distinguishable, though frequently two or three may be seen growing s Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-heart-rot-97-preparations-for-making-observations-on-these-patches-were-obtained-by-first-soaking-sections-in-dilute-hcl-until-bleached-then-staining-with-safranin-and-mounting-in-canada-balsam-the-hyphal-walls-which-were-previously-dark-brown-readily-absorb-the-saf-ranin-whilst-those-which-were-formerly-colourless-remain-so-in-sections-mounted-in-this-way-the-following-details-may-be-observed-as-shown-in-fig-35-the-hyphae-at-the-edge-of-the-dark-patch-are-easily-distinguishable-though-frequently-two-or-three-may-be-seen-growing-s-image216450129.htmlRMPG449N–. The fungal diseases of the common larch . Larches. HEART-ROT 97 preparations for making observations on these patches were obtained by first soaking sections in dilute HCl until bleached, then staining with safranin and mounting in Canada balsam. The hyphal walls, which were previously dark brown, readily absorb the saf- ranin, whilst those which were formerly colourless remain so. In sections mounted in this way the following details may be observed. As shown in fig. 35, the hyphae at the edge of the dark patch are easily distinguishable, though frequently two or three may be seen growing s
. The fungal diseases of the common larch . Larches. INTRODUCTION 11 m.r formation, wliicii leaves the inner cortex intact even in old stems. Two Idnds of specialized elements occur in this layer. The first are small cells set aside for the purpose of con- taining crystals of calcium oxalate. These ceUs are only found in older stems, and are very frequent in the neighbour- hood of cankers. The second are irregularly branched sclerenchymatous cells with very thick walls (fig. 6, s.e.). These elements grow longi- tudinally, forcing their way between the parenchymatous cells, and often branch. Th Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-introduction-11-mr-formation-wliicii-leaves-the-inner-cortex-intact-even-in-old-stems-two-idnds-of-specialized-elements-occur-in-this-layer-the-first-are-small-cells-set-aside-for-the-purpose-of-con-taining-crystals-of-calcium-oxalate-these-ceus-are-only-found-in-older-stems-and-are-very-frequent-in-the-neighbour-hood-of-cankers-the-second-are-irregularly-branched-sclerenchymatous-cells-with-very-thick-walls-fig-6-se-these-elements-grow-longi-tudinally-forcing-their-way-between-the-parenchymatous-cells-and-often-branch-th-image232034077.htmlRMRDE1R9–. The fungal diseases of the common larch . Larches. INTRODUCTION 11 m.r formation, wliicii leaves the inner cortex intact even in old stems. Two Idnds of specialized elements occur in this layer. The first are small cells set aside for the purpose of con- taining crystals of calcium oxalate. These ceUs are only found in older stems, and are very frequent in the neighbour- hood of cankers. The second are irregularly branched sclerenchymatous cells with very thick walls (fig. 6, s.e.). These elements grow longi- tudinally, forcing their way between the parenchymatous cells, and often branch. Th
. The fungal diseases of the common larch . Larches. 132 HEART-ROT CAUSED BY OTHER FUNGI m.r of a state of tension can be observed in the cell walls them- selves. The general form of the tracheides is unaffected, but cracks appear in the walls, always rising from right to left, as shown in fig. 54, and usually in tiers, one above another. These cracks appear first in the summer wood, and in all stages are more conspicuous in the summer wood than the spring wood. They do not rupture the complete wall, but the thickening on each side of the middle lamella cracks independently, and whereas on one Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-132-heart-rot-caused-by-other-fungi-mr-of-a-state-of-tension-can-be-observed-in-the-cell-walls-them-selves-the-general-form-of-the-tracheides-is-unaffected-but-cracks-appear-in-the-walls-always-rising-from-right-to-left-as-shown-in-fig-54-and-usually-in-tiers-one-above-another-these-cracks-appear-first-in-the-summer-wood-and-in-all-stages-are-more-conspicuous-in-the-summer-wood-than-the-spring-wood-they-do-not-rupture-the-complete-wall-but-the-thickening-on-each-side-of-the-middle-lamella-cracks-independently-and-whereas-on-one-image216457601.htmlRMPG4DTH–. The fungal diseases of the common larch . Larches. 132 HEART-ROT CAUSED BY OTHER FUNGI m.r of a state of tension can be observed in the cell walls them- selves. The general form of the tracheides is unaffected, but cracks appear in the walls, always rising from right to left, as shown in fig. 54, and usually in tiers, one above another. These cracks appear first in the summer wood, and in all stages are more conspicuous in the summer wood than the spring wood. They do not rupture the complete wall, but the thickening on each side of the middle lamella cracks independently, and whereas on one
. The fungal diseases of the common larch . Larches. 132 HEART-ROT CAUSED BY OTHER FUNGI m.r of a state of tension can be observed in the cell walls them- selves. The general form of the tracheides is unaffected, but cracks appear in the walls, always rising from right to left, as shown in fig. 54, and usually in tiers, one above another. These cracks appear first in the summer wood, and in all stages are more conspicuous in the summer wood than the spring wood. They do not rupture the complete wall, but the thickening on each side of the middle lamella cracks independently, and whereas on one Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungal-diseases-of-the-common-larch-larches-132-heart-rot-caused-by-other-fungi-mr-of-a-state-of-tension-can-be-observed-in-the-cell-walls-them-selves-the-general-form-of-the-tracheides-is-unaffected-but-cracks-appear-in-the-walls-always-rising-from-right-to-left-as-shown-in-fig-54-and-usually-in-tiers-one-above-another-these-cracks-appear-first-in-the-summer-wood-and-in-all-stages-are-more-conspicuous-in-the-summer-wood-than-the-spring-wood-they-do-not-rupture-the-complete-wall-but-the-thickening-on-each-side-of-the-middle-lamella-cracks-independently-and-whereas-on-one-image232033609.htmlRMRDE16H–. The fungal diseases of the common larch . Larches. 132 HEART-ROT CAUSED BY OTHER FUNGI m.r of a state of tension can be observed in the cell walls them- selves. The general form of the tracheides is unaffected, but cracks appear in the walls, always rising from right to left, as shown in fig. 54, and usually in tiers, one above another. These cracks appear first in the summer wood, and in all stages are more conspicuous in the summer wood than the spring wood. They do not rupture the complete wall, but the thickening on each side of the middle lamella cracks independently, and whereas on one
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