386 BRYACE^. [Eypiium. 



141. H. Watsoni, Lesq. & James. DioDcious : plants 

 loosely cesjjitose ; steins erect, pinnately ramulose ; branchlets 

 close : leaves hamate-secuncl, short and small, broadly ovate- 

 oblong, concave at base, lanceolate, more or less long-acuminate, 

 subulate, very entire, reflexed toward tlie apex, obscurely bi- 

 costate at the base ; areolation very narrow, short-vermicular, 

 uniform throughout the leaf; inner perichretial leaves long 

 lanceolate-acuminate, subulate, thin and whitish, plicate length- 

 wise : capsule long, subcylindrical, slightly cernuous, arcuate and 

 constricted under the orifice when dry; operculum obliquely 

 rostrate, muticous. — Proc. Amer. Acad, xiv. 138. JI. im2)oneits, 

 James, Bot. King Exp. 410. 



IIab. On rocks, Bear River Caiion, Uinta Mountains, Utah ( Wat- 

 son). 



Comparable to some varieties of //. uncinatum, and considered by Austin 

 (Bull. Torr. Club, vii. 0) to be identical with IL plicatile, Mitt., //. 

 Heufleuri, Juratzka, etc. 



Subgenus XIX. CRATONEURUM. 



Plants varying in size, with few branches, regularly pin- 

 nately ramulose ; stem thick, covered by a dense felt of radicles 

 and numerous paraphyllia. Leaves cordate-lanceolate, falcate- 

 secund, thickly costate, densely areolate ; cells linear, those of 

 the decurrent excavate angles loose, dark, subopaque. Flowers 

 dioecious. Capsule long-pedicellate, large, oblong or cylindrical- 

 oblong, erect at the neck, cernuous, arcuate when dry. Pedicel 

 smooth. 



142. H. filicinum, Linn. Leaves rigid, ovate-lanceolate, 

 not sulcate ; costa stout, percurrent ; borders serrulate ; cells of 

 the basilar decurrent broadly excavate angles abruptly enlarged, 

 orange-color ; perichaetial leaves erect, the inner scarcely plicate, 

 serrate at the a])cx : capsule cylindrical-oblong; operculum 

 convex-conical, apiculate ; segments slightly cleft ; cilia 3, as 

 long as the teeth; annulus simple, narrow. — Spec. PI. 1125; 

 Bryol. Eur. t. 609. Stereodon Jilicinus, Mitt. Amhlystegium 

 Jilicinum., Lindb. 



Var. trichodes, Brid. Stems prostrate: leaves smaller, 

 more rigid, subsecund or spreading. — Muse. Recent. Suppl. iv. 

 177. H. duhium., Dicks. 



