Hepaticw of }\oith Aimrica. 79 



5. R. Hallii Aust. Size, sporogonium and general habit 

 like the last; leaves more incurved at the apex; inner involucre 

 larger, elliptic-ohlong, subinflated. narrower at the apex, the 

 mouth often somewhat fleshy; involucral leaves smaller, more 

 equally bilohed. 



i7a?>.— Salem, Ore. [Hall). 

 Bib.— Torrey Bull. VI, 19. 



6. R. Xalapensis Mont. Stems procumbent, densely 

 pinnately branching, flaccid; leaves densely imbricate, orbicu- 

 lar, obtuse, complicate, somewhat inflated at base, the lobe 

 broad, sul^rotund, produced above the stem, the margin undu- 

 late, the base acutely excised and somewhat adnate to the stem; 

 sporogonium on a terminal or lateral branch; inner involucre 

 elongate, funnel form, the mouth compressed, obsoletely crenate. 



Hub. — On wet rocks, Tallulab Falls, Ga (SuUivant, LesqucretLv). (,Eu.) 

 Bib. — Syn. Hep. p. 255. 

 Ex.iic.^Hep. Bor.-Amer. No. 88b. 



** Leaves loosehj imbricafc. 



7. R. Sullivanti Aust. Stems close, subi)arallel, imbri- 

 cate-ctpspitose; branches short, diverging; leaves subimbricate. 

 flaccid, rotund-oval, falcate, convex, more or less decurved at 

 the apex, abruptly complicate ventrally at the base, the margin 

 siibrepand-dentate, the inferior rounded and carinate, the lobe 

 rather small, subinflated at the apex, obtusely triangular or 

 semicircular-rotund, the inner margin adnate to the stem and 

 parallel with it; sporogony phase unknown. 



Hub. — On rocks in mountain regions; (ia. (Sidlirant, Lesquereiu). 

 Bib — Torrey Bull. VI, 19. 

 E.isic. — Hep. Bor.-Amer. No. 8Sc. 



8. R. spicata Aust. Stems short, prostrate, strongly 

 innovate-branching; leaves semivertical or subascending, broad- 

 ly obovate, obtuse, entire, inflated at the base, very obtusely 

 complicate for a short space then bilobed. the lobes convex on 

 both sides, the ventral smaller by half, triangular-ovate, obtuse, 

 adnate to the inner margin of the stem; leaves of the branches 

 smaller, more inflated at the base; inner involucre oblong from 



