. The elements of botany for beginners and for schools. Botany. 164 CRYPTOGAMOUS OR FLOWERLESS PLANTS. [SECTION 17. end of the stem. The analogue of the aiitlier {Antheridium) is a cellular sac, w'liich in bursting discharges innuiiicrabic delicate cells floating in a mucilugiuous liquid; each of these bursts and sets free a vibratde self- 531 531 541 540. 529 536 535 537 moving thread. These threads, one or more, reach the orifice of the pistil- shaped body, the Pistillidium, and act upon a particular cell at its base within. This cell in its growth develops into the spore-case and its stalk
. The elements of botany for beginners and for schools. Botany. 164 CRYPTOGAMOUS OR FLOWERLESS PLANTS. [SECTION 17. end of the stem. The analogue of the aiitlier {Antheridium) is a cellular sac, w'liich in bursting discharges innuiiicrabic delicate cells floating in a mucilugiuous liquid; each of these bursts and sets free a vibratde self- 531 531 541 540. 529 536 535 537 moving thread. These threads, one or more, reach the orifice of the pistil- shaped body, the Pistillidium, and act upon a particular cell at its base within. This cell in its growth develops into the spore-case and its stalk (when there is anv), carrying on its summit the wall of the pistillidium, wliich becomes the calyptra. 501. Liverworts or Hepatic Mosses {Hcpatica) in some kinds re- semble true Mosses, having distinct stem and leaves, although their leaves occasionally run together; while in others there is no distinction of stem and leaf, but the whole plant is a leaf-like body, which produces rootlets on the lower face and its fructification on the upper. Those of the moss-like kind (sometimes called Scale-Mosses) have their tender spore-cases splitting into l\>ur valves; and with tlicir spores are intermixed some slender spiral Fig. 529. Mnium cuspidatum, smaller than nature. 530. Its calyptra, detached, enlarged. 531. Its spore-case, with top of stalk, magnified, the lid (532) being detached, the outer peristome appears. 533. Part of a cellular ring (nnnulus) which was under the lid, outside of the peristome, more niagnilied. 534. Some of the outer and of the inner peristome (consisting of jointed teeth) much magni- fied. 535. Antheridia and a pistillidium (tlie so-called flower) at end of a stem of same plant, the leaves torn away ((f, antheridia, $, j)isiiUidium), magmfied. 536. A bursting antheridium, and some of the accompanying jointed threads, highly magnified. 5?>7. Summit of an open spore-case of a Moss, which has a peristome of 16 pairs of teeth. 538. The double peristome of
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
