. The elements of structural botany with special reference to the study of Canadian plants ... Plant physiology; Plant anatomy. KXAMINATION OP A LIVERWORT. 195 Pi-etty much as in the Mosses, though in Marchantia the stalk of the capsule is very short, and the whole is surrounded by a loose sheath which grows up from the base and at length completely encloses it. The spores on germinating develope into plant-bodies such as we have described, so that the alternation of generations is here also well marked. 344. Other Liverworts more nearly resemble the Mosses in form, having leafy -stems, from t
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. The elements of structural botany with special reference to the study of Canadian plants ... Plant physiology; Plant anatomy. KXAMINATION OP A LIVERWORT. 195 Pi-etty much as in the Mosses, though in Marchantia the stalk of the capsule is very short, and the whole is surrounded by a loose sheath which grows up from the base and at length completely encloses it. The spores on germinating develope into plant-bodies such as we have described, so that the alternation of generations is here also well marked. 344. Other Liverworts more nearly resemble the Mosses in form, having leafy -stems, from the summit of wliich arise slender stalks with capsules at the upper end. These capsules, however, do not open by a stoma, but are f our- valved, and at maturity the valves split asunder, allowing the escape of the spores. In the leaves of these latter forms there are no veins of any kind. Forms in which the plant-body is a flat expansion, as in Marchantia, are distinguished as thalloid, while the leafy forms are said to be foliose. 345. It remains to be added that Marchantia'a.nA other Liverworts reproduce themselves by buds as well as by spores. â These buds (genimm) are formed in little cup- shaped receptacles which appear on the upper surface of the plant-body. They consist of simple masses of tissue, which fall away when fully growh, and immediately develope into new plants. .â ?igr- 245.â^Thallus with star-shaped receptacle bearing archegonia; natural Eize. (Thomg.). Fig. 245.. 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 work.. Spotton, Henry Byron, 1844-. Toronto, W. J. Gage & Co