HepaticcK of North America. 69 



sistent at the apex of the valves, erect, unispiral. Leaves 

 delicate. Amphigastria entire or bifid. Stems faciculate or 

 irregularly branching. Entire plant of small size, some species 

 scarcely visible to the unaided eye. Named for A.-L.-S. Lejeune 

 a French botanist. 



* Amphigastria entire or barely emarginate. 



1. L. calyculata Tayl. Stems entangled, branched; 

 leaves spreading-recurved, oblong, obtuse, entire, the lower lobe 

 involute, lanceolate; amphigastria rotund; inner involucre axil- 

 lary, somewhat exserted, obcordate, 4-winged, the wings entire; 

 involucral leaves narrow, acute. 



Hab. On lichens; Laurel Mts., Pa. (Lea in Herb. Hook.) 

 Bib.Syu. Hep. p. 752. 



2. L. cyclostipa Tayl. Stems 1 1.5 cm. long, widely 

 branched; leaves pale green, imbricate, spreading-recurved, 

 oblong, obtuse, entire, the ventral lobe quadrate-ovate, involute, 

 one-toothed; amphigastria renif orm-rotund ; inner involucre 

 terminal, obcordate, compressed, plane above, ventricose-4- 

 winged beneath, the wings ciliate with dentate cilia; involucral 

 leaves nearly covering the inner involucre. 



Hab. Bark of trees; near Cincinnati, O. (Suttivant). 

 Bib.Syn. Hep. p. 749. 



3. L. polyphylla Tayl. Stems csespitose, 6 8 mm. long, 

 ascending; leaves olive-green, vertical, imbricate, concave, semi- 

 cordate, entire, the lobe involute, lanceolate; amphigastria 

 minute, renif orm; inner involucre immersed, rotund-obovate, 

 5-6-angled near the apex, the angles crested, somewhat den- 

 ticulate. 



Hab. Near Cincinnati, 0. (Herb. Hook.) 

 Bib.Syu. Hep. p. 751. 



4. L. auriculata Hook, and Wils. Stems 1 1.7 cm. 

 long; leaves dark-green, closely imbricate, acinaciform, com- 

 plicate and somewhat 2-lobed at base; amphigastria obovate- 

 rotund, emarginate; inner involucre obovate-triangular. 



Hab. Bark of trees ; La. 



