90 Illinois State Lahorator)/ of Natural Histo}-y. 



5. L. crocata Nees. Stems creeping, branching; leaves 

 pale, oval-subquadrangular, plane-ascending, somewhat rigid, 

 the sinus somewhat lunate, the teeth slightly unequal, distant, 

 acute or obtuse; amphigastria one-third as large as the leaves, 

 ovate, deeply bifid, the laciniae lanceolate-acuminate, extrorsely 

 1-toothed. ( Jung er mania crocata DeNot.) 



Hah. — On ground and on dry rocks in limestone regions. (Eu.) 

 5i6.— Syn. Hep. p. 160 ; Hep. Europ. p. 85. 

 Exsic. — Hep. Bor.-Amer. No. 65. 



6. L. Hallii Aust. Stems creeping, very slightly radic- 

 ulose; leaves subvertical, oblong, entire or subrepand, crenulate, 

 bilobed almost to the middle, the sinus obtuse, the lacinias sub- 

 erect, mostly obtuse ; lower amphigastria small, deeply biparted, 

 the sinus obtuse, the laciniae subequal; upper amphigastria 

 larger, extrorsely unidentate on both sides or palmately 3-4- 

 parted; apical amphigastria sublanceolate, narrowly bifid, ex- 

 trorsely repand-dentate. 



Hah.— On the ground; 111. {E. Hall). 

 Bih.—Vro. Phil. Acad. 1869, p. 222. 



XXII. PLEURANTHE Tayl. 



Fructification lateral. Inner involucre elongate-fusiform, 

 rising from the lower side of the stem, fleshy, solid, rooting at 

 the base, membranous above, the mouth compressed or trique- 

 trous, 2-3-cleft, lacerate. Involucral leaves 3, minute, scale- 

 like, 2-3-cleft. Calyptra concrete with the inner involucre 

 except at its apex. Capsule oval. Elaters bispiral. Leaves 2- 

 lobed or emarginate. Amphigastria lanceolate, entire. Name 

 from Gr. pleura, the side, and anthos, flower, from the lateral 

 fructification. 



1. P. olivacea Tayl. Stems creeping, mostly simple, 

 profusely rooting; leaves imbricate, rotund-oblong, somewhat 

 emarginate; inner involucre rather large. 



Hah. — "North America" [Drummond). 

 Belin.—^xxWiv. Mosses U. S. t. VII. 

 £i6.— Syn. Hep. p. 689. 



