. Plants and their uses; an introduction to botany . Archigonio- phores (f) bearing ripe fruit (sporophytes),the spore-cases of which are seen projectingbeyond the curtains which protected themwhile young. Two of the spore-cases haveburst showing the projecting elaters. (At-kinson.) extending into the capsule is a column of somewhat elongated cells,which is called the columella (Fig. 345, c, c). Breathing-pores atthe surface permit aeration of the inner cells. Hepatica? are plants producing archegonia upon a mostly prostrateand thalline gametophyte which may be variously lobed or branchedand o
. Plants and their uses; an introduction to botany . Archigonio- phores (f) bearing ripe fruit (sporophytes),the spore-cases of which are seen projectingbeyond the curtains which protected themwhile young. Two of the spore-cases haveburst showing the projecting elaters. (At-kinson.) extending into the capsule is a column of somewhat elongated cells,which is called the columella (Fig. 345, c, c). Breathing-pores atthe surface permit aeration of the inner cells. Hepatica? are plants producing archegonia upon a mostly prostrateand thalline gametophyte which may be variously lobed or branchedand often resembles a flattened leafy moss, but which generally haswell-contrasted upper and lower surfaces; and there is a sporaiigitwigenerally dehiscing longitudinally and discharging its spores by meansof intermingled thread-like elaters. There are about 3,000 species. 190. The true mosses (Class Musci). The name popularh given to any small, matted plant of soft texture Col-u-mella < L. diminutive of columna, a pillar. 520 LIFE-HISTORIES. Fig. 341, III.—Uinljiclla-livorwort. Top of arrhigoniophorc (t) cut ver-tically to show tlu stalked sijorophytos of difTcrcnt ages: the two innerones arc still within the enlarged wall of tlu> archc^goniuni; the right-hand one has protruded on its stalk leaving the arehegonial wall as asheath (calyptra) at the base of its stalk; while the left-hand one hasburst open and is shedding its spores and elatcrs. (Atkinson.)
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
