. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. TBB CRTFTOOAMIA OR FLOWEBLESS PLANTS. 129 antheridia (as pollen?) and actively floating until they reach the arche- gones, or perish. 634. Altehnate generation is a phenomenon distinctly traced in many of the cryptogams. Thus the mosses, In germinating, first produce long, greenish fila- ments quite analogous to the Confervae (frog'a-spawn). From these, at length, buda arise and grow into a true moss. Ferns, also, and Equise
. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. TBB CRTFTOOAMIA OR FLOWEBLESS PLANTS. 129 antheridia (as pollen?) and actively floating until they reach the arche- gones, or perish. 634. Altehnate generation is a phenomenon distinctly traced in many of the cryptogams. Thus the mosses, In germinating, first produce long, greenish fila- ments quite analogous to the Confervae (frog'a-spawn). From these, at length, buda arise and grow into a true moss. Ferns, also, and Equisetaceffi, first from the spore exist in the form of a liverwort—a small green thallus, creeping and rooting along the ground. Secondly, upon this prothaUus reproductive Organs are developed and an embryo, whence a true fern arises. Thus the plant is transiently, as it were, a liverwort, permanently, a fern. (§21—23.) 635. Other modes op propagation occur in these plants, as, for example, by mnovatioTis, sporules, gonidia. These bodies are analogous to bulbs and bulblets > in the flowering plants, originating from the nutritive organs, and capable of sepa- rating from the parent and growing up independent 053 K» 554 655 SS6 557 662, Zoospore of one of the Confervaa (Ohaetophora). 65S, PhytozoSn of Chara. 554, Anthe- rldlam of Fncus containing two phytozoa. 555, ZoiispoTe of Conferva with a toft of cUiae. 656, Another species with but two cUiie. 597 Zoospore of Yanoheiia with cilia all 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 Wood, Alphonso, 1810-1881. New York : A. S. Barnes & Burr
Size: 3309px × 755px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublisher, booksubjectbotany
