Hepaticce of XotiJ/ Aiitcr/'cit. 57 



IV. STEBTZIA LEHM. 



Dioecious. Involucre at first terminal- arising from the 

 midrib of the thallus, at length dorsal, cup-shaped, short-lacer- 

 ate. Inner involucre elongate, tubular, the mouth denticulate. 

 Calyptra equaling the perianth, irregularly torn at the apex. 

 Capsule oval, 4-valved. Elaters filiform, free, bispiral. An- 

 droecium dorsal on the midrib, covered with minute, fimbriated, 

 perigonial leaves. Thallus with a distinct costa. (DiLJSNA 

 Dumort. ) Named for J. Steetz, a German botanist. 



1. S. Lyellii Lehm. Thallus 2.510 cm. long, 0.61 

 cm. wide, simple or two-cleft, delicate, the margin entire, 

 slightly crenate or obscurely serrate. (Jimgermania Lyellii 

 Hook., J. shiiffrfrt et J. oblonga Schwein., Blyttia Lyellii Endl., 

 Diplolcena Lyellii Dumort., Dilcena Lyellii Dumort.) 



Hob. Among mosses in swamps, often aquatic ; common. (Eu.) 



Bib. Syn. Hep. p. 785; Hep. Europ. p. 137. 



Delin Brit. Jung. t. 77 ; Ekart t. X f . 87 ; Sulliv. Mosses U. S. t. VI. 



Essie Muse. Alleghan. No. 281 ; Hep. Bor.-Amer. No. 109. 



V. METZGERIA RADDI. 



Dioecious. Involucre arising from the lower surface of the 

 midrib of the thallus, one leaved, scale-like, at length ventri- 

 cose and two-lobed. Inner involucre wanting. Calyptra 

 ascending, oblong-ovate, rather fleshy. Capsule ovate. Ela- 

 ters unispiral, adherent to the tips of the valves. Antheridia 

 1-3, enclosed by a one-leaved involucre on the under side of the 

 midrib. Gemmae ovate, aggregated on the attenuate tips of 

 the linear thallus. Midrib distinct. Named for Sig. Giomnni 

 Metzger, an Italian botanist. 



1. M. pubescens Raddi. Dioecious; thallus 3 cm. long, 

 2 mm. wide, not very elongate, alternately pinnate or somewhat 

 decompound, the branches short, linear and of uniform width, 

 flat, undulate on the margins, everywhere, above and below, 

 uniformly and densely villose; the hairs beneath longer, all 

 single, or many at the margin double or in threes, nodding, and 



