74 llJiiio/s Sf(ff(' L((hornfor)i of Natiirtd Hisforij. 



2. P. xanthocarpa Lelini. und Liiideiib. Stems (> — 8 

 mm. long, creeping, subpinnately branching; leaves imbricate, 

 ovate-subcultrate, obtuse, entire, the ventral margin straightish, 

 the loljule convolute, ovate, the apex emarginate-truncate ; am- 

 phigastria contiguous, reniform-subrotund, entire; inner invo- 

 lucre lateral, subsessile, obovate, emarginate, ventrally carinate, 

 the carina 2-winged at the apex. (Lejeunia eaten ulata Nees, 

 Jungermania transrersaUs Schwein.) 



Hob. — On trees in the So. States {Sullimrd, liavenel). 

 Bib.— ^yn. Hep. p. 323 (sub Lejeunia). 

 Exsic. — Hep. Bor.-Amer. No. 95b. 



X. MADOTHECA Dumort. 



Dioecious. Sporogonium lateral, nearly sessile. Inner in- 

 volucre ovate, biconvex, the mouth bilabiate, incised or entire. 

 Involucral leaves 2 or 4, 2-lobed. Calyptra globose, persistent, 

 rupturing below the apex. Capsule globose, on a peduncle lit- 

 tle exceeding the inner involucre, membranous, pale. Elaters 

 free, attenuate at both ends, bispiral. Spores rather large, 

 somewhat angular. Antheridia in the saccate bases of closely 

 imbricate, 2-lobed perigonial leaves. Leaves deeply and un- 

 equally bilobed. Amphigastria large, decurrent. Name from 

 Gr. }nados, bald, and theka., capsule. 



* Ampliiyasfria entire or nearJy so. 

 f Stems eommonly siwphj p'nniate. 



1. M. rivularis Nees. Stems somewhat pinnate or tri- 

 fid; leaves entire, closely imbricate, the lobes ovate; upper lobe 

 convex, obtuse, decurved; lower lobe much smaller, separated 

 nearly to the base, revolute from the middle backward; amphi- 

 gastria somewhat scattered, subquadrate, rounded and reflexed 

 at the apex; involucral leaves entire, the lobes acute, the upper 

 ovate, the lower smaller, ovate-oblong; inner involucre bilabiate. 



Hah.— On shaded rocks, near Yellow Springs, O. (Sullivant), Cal. 

 {Bolander), N. Mex. {Fendler). (Eu.) 



Bib.— Syn. Hep. p. 278, Hep. Europ. p. 24. 

 Exsic— Hep. Bor.-Amer. No. 91b, 91c. 



