ACOTYLEDONS. — HEPATIC.^. Marchant'ia. 119 



conduplicate ciliated at the margin, calyptra obovate hispid. 

 Hook. Jung. t. 55 and 56. Light f. p. 791. 

 Hab. Trunks of trees and rocks, plentiful. 



61. J. piihesceiis, frond Hnrar dichotomous membranaceous cos- 

 tate pubescent in every part. Hook. Jung. t. 73. 



Hab. Rocks in alpine situations, not unccnimon, 



** Calyx double. 



62. J. Lyellii, frond oblong somewhat branched membranous 

 costate the margin nearly entire, fruit arising from the superior 

 surface of the fronds, cal. double, ext. very short its margin 

 laciniato-dentate, int. much exserted cylindrical subplicate, 

 calyptra longer than the cal. Hook. Jung. I. 77. 



Hab. Drumly Airy, a waterfall on the Noran, Angus-shire, Mr. Lyell. 

 Damp woods, near the burn side, Forfar, D.Don. 



63. J. hibcrnka, frond oblong dichotomous membranous costate 

 with the margin entire, fruit arising from the superior surface 

 of the frond, cal. double, ext. very short laciniated, int. much 

 exserted ovato-cylindrical subplicate, calyptra much shorter 

 than the interior cal. Hook. Jung. t. 78, and Suppl. t. 4. 



Hab. Catlaw, near Kinnordy, Angus-shire, Mr. Lyell. 



4. TARGIONIA. 



Common receptacle of the fruit none. Perianth or cali/x globose, 

 arising from the underside of the extremity of the frond, at 

 length opening vertically into 2 valves. Capsule globose, 

 nearly sessile, included in the cal., opening irregularly at the 

 extremity and filled with seeds and spiral Jilaments. 



\. T. htjpophylla. Light/, p. 792. E.B. 



Hab. Moist banks, rare. Near the Tarbet of Cantire, on the con- 

 fines of Knapdale, Light/. 



Fro??c/s imbricated, dark green, oblongo -obovate, purple and scaly be- 

 neath, with many radicles. Cal. sphserical, sessile. Nobodies ana- 

 logous to anthers (as they are called) have ever been discovered on 

 this plant, nor any kind of fructification but the capsular. 



5. MARCHANTIA. 



Common receptacle of the /rnit pedunculated peltate, bearing 

 beneath shortly pedunculated capsules which are pendent, 

 opening at the extremity with about 8 teeth, and filled with 

 seeds and spiral /laments- Anthers (P) oblong, sessile, im- 

 bedded in a flat carnose sessile or pedunculated papillary disk. 

 — Gemmce are also abundant in this genus on the frond, lenti- 

 cular, contained in variously shaped receptacles, and germina- 

 ting even while on the parent frond. 



I. M. polymorpha, receptacle of the capsules deeply cut in a 

 stellated manner into about ten narrow segments, that of the 

 anthers pedunculated. Light/, p. 793. E, B, t, 210. 



