. Elementary botany. Botany. MOSSES. 159 of mosses, and is one way in which they are separated from the leafy-stemmed liverworts, the latter never having a midrib. 336. The fruiting moss plant.—In fig. 197 is a moss plant "in fruit," as we say. Above the leafy stem a slender stalk bears. the capsule, and in this capsule are borne the spores. The capsule then belongs to the sporophyle phase of the moss plant, and we should inquire whether the entire plant as we see it here is the sporophyte, or whether part of it is gametophyle. If a part of it is gametophyte and a part sporophyte, th
. Elementary botany. Botany. MOSSES. 159 of mosses, and is one way in which they are separated from the leafy-stemmed liverworts, the latter never having a midrib. 336. The fruiting moss plant.—In fig. 197 is a moss plant "in fruit," as we say. Above the leafy stem a slender stalk bears. the capsule, and in this capsule are borne the spores. The capsule then belongs to the sporophyle phase of the moss plant, and we should inquire whether the entire plant as we see it here is the sporophyte, or whether part of it is gametophyle. If a part of it is gametophyte and a part sporophyte, then where does the one end and the other begin? If we strip off the leaves at the end of the leafy stem, and make a longisection in the middle line, we should find that the stalk which bears the capsule is simply stuck into the end of the Fig. 197. Portion of moss plant of Mnium affine, showing two sporogonia from one branch. Capsule at left has just shed trie cap or operculum ; capsule at right is shedding spores, and the teeth are bristling at the mouth. Next to the right is a young capsule with calyptra still attached; next are two spores enlarged. leafy stem, and is not organically connected with it. This is the dividing line, then, between the gametophyte and the sporo- phyte. We shall find that here the archegonium containing. 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
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