. Plant studies; an elementary botany. Botany. 306 PLANT STUDIES of the capsule like a loose which sooner or later falls cap off. or hood (Fig. 276, c), As stated before, the mature structure developed from the oospore or egg is called a sporogoni- um, a form of sporo- phyte peculiar to the Bryophytes. 201. The sporogoni- um.—In its fullest de- velopment the sporogo- nium is differentiated into the three regions, foot, seta, and capsule (Fig. 276); but in some forms the seta may be lacking, and in others the foot also, the sporo- gonium in this last case being only the capsule or spore case, w
. Plant studies; an elementary botany. Botany. 306 PLANT STUDIES of the capsule like a loose which sooner or later falls cap off. or hood (Fig. 276, c), As stated before, the mature structure developed from the oospore or egg is called a sporogoni- um, a form of sporo- phyte peculiar to the Bryophytes. 201. The sporogoni- um.—In its fullest de- velopment the sporogo- nium is differentiated into the three regions, foot, seta, and capsule (Fig. 276); but in some forms the seta may be lacking, and in others the foot also, the sporo- gonium in this last case being only the capsule or spore case, which, after all, is the essential part of any sporogonium. At first 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- sporium, a word meaning " the beginning of ;. Fig. 279. Sporogonium of Funar-ia : A, an em- bryo sporogonium (/,/'), developing within the venter (ft, b) of an archegonium ; 23, 0, tips of leafy shoots bearing young sporo- gonia, pushing up calyptra (c) and archego- nium neck (h), and the foot becoming im- bedded in the apex 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
Size: 1139px × 2193px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcou, bookcentury1900, bookdecade1900, booksubjectbotany
