— 403 — 



often percurrent. Capsule globose obtusely apiculate; pedicel 

 short or indistinct. Stem often finally branching. — Wet 

 clayey soil r. Amer. U. 8.: SuUivant, com. C. Mueller. 

 2. A.Hampei Limpricht (»Physcomitrella patens + Physcomitrium 

 ephaericums). — Physcomitrella Limpr.; Aphanorhegma Kindb. 

 Calyptra as in the last. Capsule oval with short conic point, 

 pedicel not much shorter. Leaves as in Physcomitrella. — Eur. r. 

 »Germany»: Limpricht. 



Fam. 38. PhascacesB. 



169. Phasciim L. 



A. Leaves close to an head-like bud, us. smooth and ser- 

 rulate. 



I. Acaulon. Capsule immersed globose not or indistinctly 

 mamillate; calyptra very short mitriform. Leaves us. serrulate 

 at the mostly recurved borders; costa r. longexcurrent. Mon- 

 oecious with distinct male flowers. Plants minute. 



B. Leaves not densely close, us. papillose and entire (or 

 faintly sinuolate). 



a. Capsule not rostrate. 



IL Aschisma. Capsule immersed subglobose apiculate; ca- 

 lyptra broad short submitriform, often cleft at one side. Leaves 

 papillose involute; costa subpercurrent. Monoecious with distinct 

 male flowers. Plants minute. 



III. Eu-Phascum. Capsule often exserted, oval-globose api- 

 culate or r. mamillate; calyptra us. broad subcucullate or r. 

 mitriform. Leaves us. papillose often reflexed; costa excurrent. 

 Paroecious. Stem often distinct. 



b. Capsule obliquely rostrate. 



IV. Mildeella. Capsule sometimes exserted, suboval or r. 

 globose; calyptra narrow cucullate. Leaves mostly papillose; 

 costa gen. long-excurrent. Monoecious with distinct male flowers, 

 or dioecious. Stem distinct. 



I. Acaulon C. Mueller. 



A. Leaves smooth; costa complete. 



a. Leaves concave; costa subpercurrent. 

 l.Ph.muticum Schreber. — Acaulon C. M.; Sphasrangium 

 Schimper. 



Upper leaves subovate acute or short-acuminate; borders re- 

 curved (sinuolate or serrulate) above; costa short-excurrent or 

 percurrent. Inner perichetial leaves of same length, not wholly 

 convolute, us, serrulate and much longer than the short-pedi- 



