. 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. THE CRTPTOGAMIA OB FLOWERLESS PLANTS. 625 524 127. Hepaticae. 523, Marohantia, sterile plant. 524—5, Fertile plant. 526, Vertical section of the fertll-receptacle; 52T, of a perianth, showing the sporange bursting. 528, One of the elators "With four spores. 529, Portion of it highly magni&ed. of the flowering plants. In the mosses, liver- worts, etc., they appear only on the full-grown plant; In the ferns, Equisetace
. 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. THE CRTPTOGAMIA OB FLOWERLESS PLANTS. 625 524 127. Hepaticae. 523, Marohantia, sterile plant. 524—5, Fertile plant. 526, Vertical section of the fertll-receptacle; 52T, of a perianth, showing the sporange bursting. 528, One of the elators "With four spores. 529, Portion of it highly magni&ed. of the flowering plants. In the mosses, liver- worts, etc., they appear only on the full-grown plant; In the ferns, Equisetaceje, etc., they ap- pear only on the prothallus, the earliest growth of the spore, and here the archegone gives birth to an embryo, whence at length the true fern arises, while the prothallus dies away 630. Spores. These are the true reproductive germinating bodies of the Cryptogams. They con- sist each of a single cell, often exceedingly minute, and produced in immense numbers. The cell-wall of the spore may bo sim- ple (Botrytis) or double, as if a cell within a cell ,, .„. .„. 640 539 B3T (ferns). But the spores ^^^^^_ 58r, Agaricus (Mushroom) in various stages: a, are often apparently tearing open the volva; 5, annulus, the remains of the veil Hniiblp or 2-cplIpd /lirh-W' "• P"™'' "'"5"=^"™' 538, Portion of the gills. 539, ens), or 4-Celled, or 6, 8, Cyathus; 541, Section. 642, One of the coneeptaoles. 548, or many-celled. These''™"='""" (™"'°"'- B44,Mucor; «, myteiium. compound spores are in fact spore-vessels inclosing several spores yet immature, and called sporidia or theoa-spores. The spores or sporidia are often inclosed in still larger cells called the sac. 631. Endosporbs and exospores. Spores are developed either in the interior of the parent cell or on the outside of it, and hence the di-. Please note that these images are extracted from scanned page images that may have been digitally en
Size: 2192px × 1139px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublisher, booksubjectbotany
