. Comparative anatomy of the vegetative organs of the phanerogams and ferns. Plant anatomy; Phanerogams; Ferns. n /i. Fig. 99. FIGS. 98, 99.—Lathyrus Pseudaphaca, after Nageli. Fig. 98. Scheme of the course of the bundles in the apex of the stem supposed to l>e transparent ; the bundles on the side further from the observer are jjaler, those on tlie near side are black.—I"ig. 99 (25). Transverse sec- tion through an internode such as the lowest but one of Fig. 98 ; witli the same lettering as the latter. with one shank of the median bundle of th with it through two internodes, inserts
. Comparative anatomy of the vegetative organs of the phanerogams and ferns. Plant anatomy; Phanerogams; Ferns. n /i. Fig. 99. FIGS. 98, 99.—Lathyrus Pseudaphaca, after Nageli. Fig. 98. Scheme of the course of the bundles in the apex of the stem supposed to l>e transparent ; the bundles on the side further from the observer are jjaler, those on tlie near side are black.—I"ig. 99 (25). Transverse sec- tion through an internode such as the lowest but one of Fig. 98 ; witli the same lettering as the latter. with one shank of the median bundle of th with it through two internodes, inserts itself lateral bundle of the second lower trace. in conjunction with the median bundle of the second node on an axillary bundle of the next lower trace. The two axillary bundles, lic, ik, op, tu, take an inde- pendent course in their own internode, in the next they combine with the lateral leaf-bundles of the next higher trace, and insert themselves in the se- cond node on the lateral lea'-bundles of the next lower trace. These con- ditions are very regular: the transverse section through an internode therefore shows regularly 11 bundles ; Fig. 97 shows the arrangement of these, and explains them by means of the same lettering as at the lower end of Fig. 96. 10. Leaves alternating in two rows. The rows are nearer one side in the terminal bud. Leaf-trace of 3 bundles, which pectinate with the traces of both rows. Medicago sati'va, Latbyrus Nissolia, [.. Aphaca and Pseudaphaca, L. Odor at us, L. puipureus. L. Aphaca and Pseudaphaca (Figs. 98, 99). The leafy .stems are four-cor- nered, the corners are sometimes slightly extended as wings. The transverse sec- tion (F'ig. 99) shows in each of the two opposite lateral edges a bundle {h, g) and internally a circle of 8 and more bun- dles, which later decrease in number by coalescence. The median bundle of the leaf-trace divides as it emerges into the leaf into 5 branches, of which the central weaker branch enters the petiole, whil
Size: 1548px × 1615px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecad, booksubjectplantanatomy, bookyear1884
