Handbook of British Hepaticae : containing descriptions and figures of the indigenous species of Marchantia, Jungermannia, Riccia and Anthoceros . wn.| Spores brown, granular. Perigonial \ J leaves terminal on more slenderstems, broadly ovate, with a hyalineragged margin. Antheridiaroundish, one or two together, onslender pedicels. Intermediate be-162. 163. tween G. concinnatum and G. crenu-latum. The leaves closely pressed together, so asnot to be easily detached, entirely, or almost,smooth at the edges, and with none of the cells pro-jecting beyond the others (fig. 163). Gymnomitrium crenula
Handbook of British Hepaticae : containing descriptions and figures of the indigenous species of Marchantia, Jungermannia, Riccia and Anthoceros . wn.| Spores brown, granular. Perigonial \ J leaves terminal on more slenderstems, broadly ovate, with a hyalineragged margin. Antheridiaroundish, one or two together, onslender pedicels. Intermediate be-162. 163. tween G. concinnatum and G. crenu-latum. The leaves closely pressed together, so asnot to be easily detached, entirely, or almost,smooth at the edges, and with none of the cells pro-jecting beyond the others (fig. 163). Gymnomitrium crenulatum, Gottsche. Tufts depressed, lurid brown ; barren shootsslender, rather terete, acute and arcuate ;leaves broadly ovate, complicate-concave,closely imbricate ; apex bidentate, sinusnarrow, lobes acute, connivent; margin cre-nulate, hyaline. Fertile shoots ovate, acuteat the apex, outer involucral leaves convolute-conoid. Gymnomitrium crenulatum, Gottsche and No. 478 ; Carr. Glean., p. 18, t. 1, f. 5;Carr. Brit. Hep., p. 9, t. 1, fig. 3 ; Carr. and Pears. 17. 18. Exs. No. 2, j ? Cooke Hep. figs. HANDBOOK OF BRITISH HEPATIC^E. 239. Ireland, in sub-alpine districts, on walls and rocks,England. (Fr. May, June.) Growing in fiat smoky brown or olive patches, 2to 4 inches broad. Stems denselymatted. Branches ascending, ofnearly equal diameter, pointedat the apex, rigid, slightly com-pressed. Flagellar flexuous, at-tached here and there by tuftsof rootlets. Leaves distichous,scarcely broader than the stem,imbricate (figs. 164, 165), ovate,acutely notched, margin narrow,crenulate. Texture thin butfirm, dark olive brown. Dioi-cous. Involucral leaves threeor four pairs, double the sizeof the stem leaves and lessconcave. The upper pair closely embracing eachother. Inner involucre of two smaller leaves, withtwo or three dentate lobes. Calyptraobovate, reticulate. Barren pistillidiaeight to twelve. Capsule buff coloured ;valves punctate, striate. Spores roundish,irregular, 11-15/
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