Desmatodon.] BRYACE^. HI 



and hyaline toward the base. Inflorescence monoecious or 



dioecious ; male flowers terminal or axillary, the fertile gemmi- 



form ; perichcetial leaves similar to the upper stem-leaves. 



Calyptra long, cucullate. Capsule erect, arcuate or cernuous 



and pendent, oval-oblong or subcylindrical, distinctly annulate. 



Peristome of 16 subulate bifid teeth; segments round-tetragonal, 



filiform, free or irregularly and transversely connate, granulose, 



erect when moist, incurved when dry, rarely slightly twisted to 



the left. Columella projecting beyond the mouth of the ripe 



capsule. 



Allied in habit, mode of growth, and texture of the leaves to Pottia ; in 

 the character of the peristome to Trichostomum and Barbula. 



* Capszde erect. 



1. D. latifolius, Brid. Monoecious: stems 1 or 2 cm. 

 long : leaves open, erect, incurved or slightly twisted when 

 dry, oval-oblong, acuminate or aristate by the excurrent costa, 

 concave or carinate, with borders revolute : calyptra covering 

 the capsule to its base : capsule oblong, cylindrical ; lid short- 

 beaked, olilique ; annulus simjile. — Bryol. Univ. i. 524 ; Bryol. 

 Eur. t. ISO. Dicramtm latifolium, Hedw. Muse. Frond, i. 89, 

 t. 33. Trichostomum latifolium, Schwaegr. Suppl. i. 145; 

 Lindb. Trichost. 224. 



Var. glacialis, Schimp. Stem longer, slender: costa 

 vanishing below the apex. — Syn. 157. 



Hab. California (Bolander); Rocky Mountains, with the var. (Dnim- 

 mond, E. IIciU, Doionie); Nevada Mountains (Watson)', Cascade Moun- 

 tains (Lijall); San Juan Range, Colorado (Brandegee). 



2. D. Systilius, Bruch & Schimp. Monoecious : leaves 

 large, ovate-oblong, soft, flat on the borders, minutely crenu- 

 late ; costa excurrent into a long hair : capsule narrower, 

 cylindrical, soft ; lid attached to the columella and falling with 

 it ; teeth smaller, less regular, partly transversely coherent to 

 each other, pale. — Bryol. Eur. t. 131. Trichostomicm 

 Systilium, Muell. Syn. i. 589. 



Hab. Mount Dana, California [Bolander] ; Rocky Mountains [Brum- 

 mond)\ Colorado (Z)oionie). 



3. D. arenaceus, Sulliv. & Lesq. Pseudo-dioecious : 

 plants short, widely cespitose : lower leaves short, erect, ovate- 



