. Botany for high schools. Botany. 320 GENERAL MORPHOLOGY OF PLANTS with sterile tissue, and also surrounded by sterile tissue. These tissues together form an elliptical body which is suspended in. Fig. 298. Funaria hygrometrica. A , a young leafy stem with the calyptra c. B, a plant g- with the al- most mature sporogonium, of which s is the seta, / the capsular portion, c the calyptra. C, longi- tudinal section of the capsular portion dividing it into two symmetrical halves; d the lid, a the annulus, / the peristome, c, d the columella, h air space, s archesporium. (After Sachs.) Fig. 299. Th
. Botany for high schools. Botany. 320 GENERAL MORPHOLOGY OF PLANTS with sterile tissue, and also surrounded by sterile tissue. These tissues together form an elliptical body which is suspended in. Fig. 298. Funaria hygrometrica. A , a young leafy stem with the calyptra c. B, a plant g- with the al- most mature sporogonium, of which s is the seta, / the capsular portion, c the calyptra. C, longi- tudinal section of the capsular portion dividing it into two symmetrical halves; d the lid, a the annulus, / the peristome, c, d the columella, h air space, s archesporium. (After Sachs.) Fig. 299. The mouth of the capsule A' of Fonti nalis antipyretica. Outer peristome ap^ inner peristome ip. (After Sachs.) an air chamber within the capsule by delicate threads (fig. 298). The spore-bearing tissue consists of a single layer of mother cells^ each one of which forms four spores. 488. Life history of the mosses.—The life history of the mosses is as follows. The spores germinate and produce a much- branched filamentous growth, the protonema^ which means first thread. This protonema resembles superficially some of the filamentous green algae, but the cross walls are often oblique and this serves at once to distinguish them. The protonema forms a thin or rather dense web on the ground or on rotten wood. The leafy-stemmed moss plant arises from this as a stouter branch, with the oblique wails regular and close together. Rhizoids are developed from the base of the leafy stem and sometimes quite. 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 Atkinson, George Francis, 1854-1918. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
