. Plants; a text-book of botany. Botany. 102 PLANT STKDCTUEES of the capsule like a loose cap or hood, known as the calyp- tra (Figs. 82, c, 107), which sooner or later falls off. As stated before, the ma- ture structure deyel- oped from the oospore is called a sporogoni- um, a form of sporo- phyte peculiar to the Bryophytes. (JU. The sporogonium. —In its fullest devel- opment the sporogoni- um is differentiated into the three regions, foot, seta, and capsule (Figs. 82, 107) ; but in some forms the seta may be lacking, and in others the foot also, the sporogonium in this last case being only t
. Plants; a text-book of botany. Botany. 102 PLANT STKDCTUEES of the capsule like a loose cap or hood, known as the calyp- tra (Figs. 82, c, 107), which sooner or later falls off. As stated before, the ma- ture structure deyel- oped from the oospore is called a sporogoni- um, a form of sporo- phyte peculiar to the Bryophytes. (JU. The sporogonium. —In its fullest devel- opment the sporogoni- um is differentiated into the three regions, foot, seta, and capsule (Figs. 82, 107) ; but in some forms the seta may be lacking, and in others the foot also, the sporogonium in this last case being only the capsule or spore case, which, after all, is the essential part of any sporogonium. At iirst the capsule is solid, and its cells are all alike. Later a group of cells within begins to differ in ap- pearance from those about them, being set apart for the produc- tion of spores. This initial group of spore-producing cells is called the arche- aporkiin, a word meaning "the beginning of ; It. Fig. 85. Sporogonium of F'/naria: A, an em- bryo Bporogonium (,/',/'), developing within the venter (b, b) of an archcgonium ; B, C, tips of k-:ify shoots bearing young sporo- gonia, pusliing up cajyptra (c) and archego. nium neck ih), and sending the fnot down into the ajiex of the gametophore,—After 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 Coulter, John Merle, 1851-1928. New York, D. Appleton and company
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