. The elements of botany for beginners and for schools. Botany. 172 CRYPTOGAMOUS OR FLOWERLESS PLANTS. [SECTION 17. composed of slender sacs (Asri), liaving lliread-slmpod cells intermiypd ; and each ascus contains lew or several spores, wliicli are commonly double or treble. Most Lichens are flat expansions of grayish hue ; some of them foliaceous in texture, but never of bright green color; more are crusta- ceous; some are wholly pulverulent and nenrly formless. But in several the vegetation leuglheus into an axis (as in Fig. 5SO), or imitates stem. 575 and branches or threads, as in the Rei
. The elements of botany for beginners and for schools. Botany. 172 CRYPTOGAMOUS OR FLOWERLESS PLANTS. [SECTION 17. composed of slender sacs (Asri), liaving lliread-slmpod cells intermiypd ; and each ascus contains lew or several spores, wliicli are commonly double or treble. Most Lichens are flat expansions of grayish hue ; some of them foliaceous in texture, but never of bright green color; more are crusta- ceous; some are wholly pulverulent and nenrly formless. But in several the vegetation leuglheus into an axis (as in Fig. 5SO), or imitates stem. 575 and branches or threads, as in the Reindeer-Moss on the ground in our northern woods, and the Usnea hanging from the boughs of old trees overhead. 516. Fungi. For this immense and greatly diversified class, it must here suffice to indicate the parts of a Mushroom, a Sphseria, and of one or two common Moulds. The true vegetation of common Fungi consists of slender cells which form what is called a Mycelium. These filamentous Fig. 575. A stone on â which various Lichens are growing, such as (passing from left to right) a Parmelia, a Sticta, and on the right, Lecidia geographica. so called from its patches resembling the outline of islands or continents as depicted upon maps. 576. Piece of thallus of Parmelia conspersa, with section through an apothecium. 577. Section of a smaller apotheciiim, enlarged. 578. IVo asci of same, and contained spores, and accompanying filaments; more magnified. 579. Piece of thallns of a Sticta, with section, showing the ; the small openings of these dot the surface. 580. Cladonia coccinea; the fructi- fication is in the scarlet knobs, which surround the 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 Gray, Asa, 1810-1888. New York : American Book Company
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
