. The structure and development of mosses and ferns (Archegoniatae). Fig. I.—Marchantiales. A, B, Male plants of Fimbriaria Californica. A, from above;B, from below; (^, antheridial receptacle; /, ventral lamellae, X4; C, Riccia glauca,X6; sp, sporogonia; D, Conocephalus conicus, X4; E, Targionia hypophylla, X2;^, antheridial branch. , Targionia (Fig. i, E), may fork comparatively seldom,and the new branches are for the most part lateral. The thallus II MUSCINE^—HEPA TIC^—MARCH ANTI ALES 23 is fastened to the substratum by rhizoids, which are unicellularand usually of two kinds, those with
. The structure and development of mosses and ferns (Archegoniatae). Fig. I.—Marchantiales. A, B, Male plants of Fimbriaria Californica. A, from above;B, from below; (^, antheridial receptacle; /, ventral lamellae, X4; C, Riccia glauca,X6; sp, sporogonia; D, Conocephalus conicus, X4; E, Targionia hypophylla, X2;^, antheridial branch. , Targionia (Fig. i, E), may fork comparatively seldom,and the new branches are for the most part lateral. The thallus II MUSCINE^—HEPA TIC^—MARCH ANTI ALES 23 is fastened to the substratum by rhizoids, which are unicellularand usually of two kinds, those with smooth walls and thosewith peculiar papillate thickenings or teeth that project inward(Fig. 12). The cells of the lower layers of tissue are usuallynearly or quite destitute of chloroplasts, which, however, occurin large numbers in the so-called chlorophyll-bearing layer, justbelow the dorsal epidermis. This chlorophyll-bearing layercontains air-spaces in all forms except some species ofDumortiera and Mon odea, and these spaces are either simplenarrow canal
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Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910
