ON CALIFORNIAN MOSSES. 7 



colla longiori cylindrica graciliori emersa; operculo conico longiori; calyptra longiori fusco-lutea, capsulam fere 

 totatn tegentc, valdc pilosa; vaginula pilis longis dense obtecta; dentibus peristomii ezterni pailidis, ciliolis ro- 

 bustis lonyioribus albidis articulatis ; florc masculo terminal!. 



Tlie male flowers are generally at the top of a branch above the innovations, and not 

 merely axillar. The dry, empty capsule is not contracted below the mouth. The ramifi- 

 cation, leaves, and areolation are the same. Oakland, on trees, scarce. 



33. ORTUOTRICIIUM L y e 1 1 i i Hook, var. foliis longioribus siccitate magis crispatis BriJ. 



The species is extremely variable, especially for the size of the leaves, sometimes covered 

 with long papilla?, sometimes nearly smooth. It grows on granite rocks and on trees. 

 The form growing on boulders has the leaves generally shorter, sometimes turned to one 

 side, especially at the top of the branches. This form is apparently Orthotrichum 

 papillosum Hampe. Our species has only rarely the confervoid filaments which 

 cover the European form. It is common in California. 



34. ORTHOTRICIIUM r i v u 1 a r e Turn. 



On a fence-post near a creek, Marin County, together with Barbula latifolia 

 Bryol. Eur. 



35. SCIHSTIDIUM confcrtum Bnjol. Eur. var. foliis brevi-piliferis, areolatione densiori, dentibus peristomii 

 rubelli ultra medium superne valde irregulariter lacerate dentatis. 



I have not seen the calyptra. This may be a distinct species. On metamorphic rocks, 

 Mount Diablo. May. 



36. GRIMMIA Calif ornica Sul. 



On granite boulders, Mission Dolores, &c. Common. April. 



37. GRIMMIA trichophylla Grev. 



On sandstone near Oakland. Among other varieties of this species, there is one with 

 a dark green color, leaves with a shorter hairy point, or even obtuse without pellucid 

 point, areolation more distinctly square at the base, and more compact-obscure above, 

 which might be separated in a species. But these variations are apparently due to the 

 habitat, and this variable species has been already too much divided. It grows on granite 

 boulders near Presidio. 



38. GRIMMIA m o n t a n a Bryol. Eur. 



It differs in nothing- from the European form but by the dark green color of the plants. 

 Monte del Diablo. April. 



