. The Canadian naturalist and geologist. Natural history -- Periodicals. 47 THE CANADIAN NATURALIST. U> ec. central axis of the capsule, and named the Columella, the apex of which joins the lid, and sometimes falls away with it, though occasionally we see the columella projecting from the mouth of the capsule like a style (figs. 21, 22). The lid having fallen. Fig. 21. Section of upper part of fruit of Mnium hornum, a. wall of capsule, b. annulus, c. lid, d. tooth of outer peristome, e. tooth of inner peristome, /. cavity of sporangium and spores, g. Columella. away, the mouth of the capsul
. The Canadian naturalist and geologist. Natural history -- Periodicals. 47 THE CANADIAN NATURALIST. U> ec. central axis of the capsule, and named the Columella, the apex of which joins the lid, and sometimes falls away with it, though occasionally we see the columella projecting from the mouth of the capsule like a style (figs. 21, 22). The lid having fallen. Fig. 21. Section of upper part of fruit of Mnium hornum, a. wall of capsule, b. annulus, c. lid, d. tooth of outer peristome, e. tooth of inner peristome, /. cavity of sporangium and spores, g. Columella. away, the mouth of the capsule is seen, sometimes naked, when it is termed gymnostomous, but usually adorned by the beautiful appendage named the Peristome, consisting of curious hygroscopic tooth-like processes in a single or double series. The simple peristome, or the outer one when double, originates from the lining membrane of the capsule; its teeth are always constant in number, 4, 8,16, 32, 64, and present an infinite variety. 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 Natural History Society of Montreal. Montreal, Dawson
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