. Plants and their uses; an introduction to botany. Botany; Botany, Economic. 544 LIFE-HISTORIES relatirely much greater stem-development, and in ha.ving the leaf- members whorled, the sac-leares in cones, and the spores tvitli elaters. 194. The club-mosses (Class LycopodinEe) are well typi- fied by Lycopodium (Fig. 166) which is popularly regarded as a kind of "moss" because of the general resenil)lance of the leaves and stems, in form and proportionate develop- ment, to the pseudo-leaves and pseudo-stems of many true mosses.. Fig. 372.—Club-aioss {Li/copodiuni sp., sec Fig. 166.) A
Image details
Contributor:
The Book Worm / Alamy Stock PhotoImage ID:
RE0T6CFile size:
7.2 MB (253.2 KB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
1930 x 1295 px | 32.7 x 21.9 cm | 12.9 x 8.6 inches | 150dpiMore information:
This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.
This image could have imperfections as it’s either historical or reportage.
. Plants and their uses; an introduction to botany. Botany; Botany, Economic. 544 LIFE-HISTORIES relatirely much greater stem-development, and in ha.ving the leaf- members whorled, the sac-leares in cones, and the spores tvitli elaters. 194. The club-mosses (Class LycopodinEe) are well typi- fied by Lycopodium (Fig. 166) which is popularly regarded as a kind of "moss" because of the general resenil)lance of the leaves and stems, in form and proportionate develop- ment, to the pseudo-leaves and pseudo-stems of many true mosses.. Fig. 372.—Club-aioss {Li/copodiuni sp., sec Fig. 166.) A, yametophyte {-'t), sliowiiig archegonia (ar) and anthcridia (a7i). B, old gamctophyte (p) nursing a young sporophyte, ^f. C, anthi'ridium {";-'-) almost ready to discharge its spermatazoids. D, arehegonium, cut vertically to show the egg-ccUs (o), the upper canal-cells dissolved into mucilage (/;c), and the lower canal-cell (Ijc), -", -'-. (Treub.) The gainetophytc (Fig. 372) is liise.xual aud massive, as in the aildcr-tongues, and mostly sapropli)'tic; and the emliryo resembles that of a fern in havino; Isut a singles cotyledon. Its development is essentially lil-:e that of the next type to be described. The .stem often forks but shows no secondary thickening. The leaves are unbranched, and in some species are all much alike, while in other cases tlu> sac-leaves are smaller than the foliage h'aves, are crowded into cones, an<l serve chiefly as protective scales for the sp(.)rangia. Each sac-leaf l)ears Init a single spore-case on its upper surface near the base. There are no elaters.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Sargent, Frederick Leroy, 1863-. New York, H. Holt and Company