252 BRYACEiE. [Aulacomnium. 



91. AULACOMNIUM, Schwaegr. (PL 3.) 



Leaves oblong or long-lanceolate, papillose ; costa semiterete, 

 dissolved below the aj^ex ; ^reolation neai-ly equal. Flowers 

 dicBcious, the male discoid or geramiforui, Calyptra narrowly 

 cucullate, long-beaked. — jSphcerocep/iahis^ Neck. 



* Dioecioiis ; 'male flowers gemmifonn^ termiiial. 



1. A. androgynum, Schwaegr. Tufts dense, green above, 

 ferruginous-tomentose inside ; stems often prolonged into small 

 grunuliferous apical heads {pseudojyocUa) : leaves linear-lanceo- 

 late, obscurely denticulate at the ajiex, curved, slightly twisted 

 when dry ; cells of the areolation small, round, papillose on 

 both faces : calyptra descending to the middle of the capsule, 

 long-beaked : capsule cylindrical-oblong, cernuous-horizontal, 

 furrowed when old ; lid large, highly convex-conical ; annulus 

 compound, revoluble. — Suppl. iii., t. 215; Bryol. Eur. t. 406. 

 Mniuni androgynum^ Linn. Spec. PL 1110. Orthopyxis aiv- 

 drogyna, Beauv. ; Lindb. Mniac. Eur. 77. 



Hab. On bare earth, roots of trees, in fissures of granite rocks, etc.; 

 plains and mountains. Cliimney Rocks, French River (Sullivant). Very- 

 rare on the Eastern slope, very common on the Western. 



* * Dioecious ; m.ale flowers discoid. 



2. A. palustre, Schwaegr. Li wide deep tufts, tomentose- 

 radiculose, reddish broAvn inside, yellowish or dirty green above; 

 stems long, flexuous : leaves erect-spreading, flexuous, twisted 

 when dry, the lower broader than the upper, linear-lanceolate, 

 carinate, transversely undulate, crenulate at the apex, reflexed 

 on the borders, acutely papillose on both faces : male plants 

 similar to the fertile ones and mixed with them ; antheridia and 

 clavate paraphyses numerous : capsule long-pedicellate, turgid, 

 ovate-oblong, ciu'ved in the middle ; lid large, highly convex at 

 base, conical, blunt at the apex ; peristome large ; teeth nar- 

 rowed into long subulate j^oints ; legments long, subulate ; 

 cilia of equal length, free or partly coherent; annulus large, 

 compound, revoluble. — Suppl. iii., t. 216 ; Bryol. Eur. t. 405. 

 Mnium palustre^ Linn. 1. c. Gymnocybe palustris, Fries ; 

 Lindb. 1. c. 87. 



Var. imbricatum, Bruch & Schimp. Leaves broader, 

 imbricate, very entire, not twisted when dry. 



