Handbook of British hepaticæ : containing descriptions and figures of the indigenous species of Marchantia, Jungermannia, Riccia and Anthoceros / by M.C. Cooke.

  • Cooke, M. C. (Mordecai Cubitt), 1825-1914.
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: Handbook of British hepaticæ : containing descriptions and figures of the indigenous species of Marchantia, Jungermannia, Riccia and Anthoceros / by M.C. Cooke. Source: Wellcome Collection.

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    stantly present, while in a few species of Lejeunia they are altogether absent. They are almost always broad, and at the apex bifid, very rarely entire. Radicles are produced, where needed, as in other hepatics. The female flowers are mostly acrogenous. The pistillidia vary in number from two to four. The calyptra is fleshy, as much as six or eight cells thick below the middle. The capsule in this genus, and the rest of Jubulece, is described as cloven into four valves, down only to a certain distance, which is about two-thirds, but entire at the broad, pale, fleshy base. Dr. Spruce considers it more correct to regard this entire portion as the dilated apex of the pedicel, ana- logous to the apophysis of some mosses. The apophysis in Frullania has the form of a shallow cup, only two or three cells thick, where it joins the true base of the valves, increasing to six or seven cells thick where it coalesces with the cylin- drical stalk. The inner face of the capsule is covered with an opaque, reddish-brown cell-stratum, very uneven in its surface, reaching to the base of the true valves. Elaters and spores are developed in the capsule, only so far down as this discoloured, spongy surface extends. The structure of the capsule, and its contained organs, is essentially the same in other Jubulea? as in Frullania. The foregoing is a summary of the remarks, under Frullania, in Spruce's Hepaticse of the Ama- zons, p. 6. Frullania dilatata, L., Dum. Loosely and vaguely pinnate. Leaves or-