The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . ofthe moss. It has been designated the sporogomum. Thesporogoninm is formed by the enlargement of the oosporeinto an ovoid embryo which presses against the epigone,finally rupturing it, and carries the upper portion upwardswith it ea the calyptra or cap, the lower portion forminga sheath or vaginula at the base. This calyptra maybe either split on one side, dimidiate, or entire, thentermed mitriform. The upper part of the sporogoniumforms a eavsule, W7», or theca ; the lower portion acts as a supporting st
The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . ofthe moss. It has been designated the sporogomum. Thesporogoninm is formed by the enlargement of the oosporeinto an ovoid embryo which presses against the epigone,finally rupturing it, and carries the upper portion upwardswith it ea the calyptra or cap, the lower portion forminga sheath or vaginula at the base. This calyptra maybe either split on one side, dimidiate, or entire, thentermed mitriform. The upper part of the sporogoniumforms a eavsule, W7», or theca ; the lower portion acts as a supporting stalk or seta, which is often swollen, just beneaththe capsule forming the apophysis (fig. 354, a). InSphagnum the sporogonium is fully developed wichin theepigonal leaves, and when complete the axis beneath itelongates, forming the jjseudopodium, and projects con-siderably beyond the perichsetium. The walls of thecapsule of the sporogonium consist of several layers of has a central axis or columella, surrounding which arethe spores. When mature the capstile usually dehisces,. Fig. 352. fig. Fio. S(i2.—Mo89 (Funaria hygnmelrica), nhoydng the cellular prolonema p. atproembryo, its roots r, and buds a, 6, wlicnce arise leafy stems bearingthe organs of reproduction. Fio. S63.—Hygrometric Cord-Moss (Funaria hvuromelrira), with Its nm-(ikstlieca u supported on stalks p, which arise from perichactial leaves /. ThatheciB aro covered by a calj-ptra c, which splits on one side. The operculumor lid o is seen in one of tlie thecaa from which the calyptra has fallen. ThaBeta Is , and displays hygrometric properties. either by four longitudinal valves, as in Andraea, or mostcommonly by a lid or operculum (fig. 355), between whichand the capsule an annulus or ring/of cells is removal of the operculum the stoma or opening of thecapsule is seen. The margin of this is sometimes entire(gymnostomi), more iisually fringed with teeth or cellularprolongat
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