HEPATICAE 429 



583. METZGE V RIA, Radd. 



[Dedicated to G. B. Metzger,* German Botanist.] 



Fertile fructification arising from the lower surface of the midrib. 

 Involucre 1-leaved, scale-like, finally ventricose and 2-lobed. Peri- 

 anth none. Calyptra ascending, oblong-obovoid, rather fleshy. 

 Capsule pedicellate, ovoid, dehiscing by 4 equal valves. Elaters 

 with one spiral fibre, adherent to the tip of the valves. Dioicous. 

 Antheridia 1 to 3, inclosed by a 1-leaved involucre on the under 

 side of the midrib. 



1. M. I ill-cat a, Nees. [Forked']: Fronds linear, thin and 

 inembranaceous, forking, or proliferous, sprinkled with white 

 pellucid hairs. Woods ; mostly on rocks. 



SUBORDER II. MARCHANTIA^CEAE. 



Frondose perennials, growing in moist places ; frond lobed, often porous; an- 

 theridia, or sterile receptacle, sometimes immersed in the frond, sometimes disk- 

 form and sessile, occasionally peltate and pedicellate; pistittidia, or fertile re- 

 ceptacle, raised on a peduncle, capitate, or radiate, bearing pendent calyptrate 

 capsules from the under side, which open variously, not 4-valved ; spores mixed 

 with elaters, which are usually with 2 spiral fibres. 



584. FIMBRIA V RIA, Nees. 



[Latin, Fimbria, a fringe ; in allusion to the perianth.] 



Fertile receptacle hemispherical, concave beneath, expanded at the 

 margin into 4 large pendent campanulate truncate involucres. 

 Perianth oblong oval, projecting for half its length beyond the rim 

 of the involucre, the projecting portion splitting lengthwise into 

 8 to 12 fringe-like segments. Calyptra with a long style, fugacious. 

 Capsule sessile, globose, dehiscing by an irregular cireumscissile 

 line near the middle. Monoicous. Antheridia immersed in the 

 substance of the frond, not collected into disks. Frond thickened in 

 the middle, with a keel-like midrib. 



1* F. tenella, Nees. \_Delicate~]: Frond elongated-cuneate, 

 nearly simple, emarginate, green above, purple on the margins and 

 underneath ; peduncle 1 to 2 inches long. Shaded places, on the 

 ground. 



585. REBOtJIL/MA, Raddi. 



[A personal name; inconveniently near Reboulea, otKunth.] 

 Fertile receptacle conic-hemispherical or flattened, 1- to 5-lobed, 

 peduncled. Involucres 1 to 5, opposite to and coherent with the 

 lobes of the receptacle on the under side, 2-valved. Perianth none. 

 Calyptra minute, lacerate, persistent at the base of the capsule. 

 Capsule globose, nearly sessile, rupturing irregularly at the apex. 

 Spores muricate. Inflorescence monoicous A ntheridia immersed in 

 sessile crescent-shaped disks. Frond rigid ; the midrib broad, 

 strong, and distinct. 



1. R. horn i s pli :ic ri r a , RaddL [Hemispheric] : Frond forking 

 and growing by joints from the extremities, green above, purple 

 beneath ; the peduncle bearded at its base and apex ; fertile recep- 

 tacle papillose on the summit. Shady, moist places. 



