OF PACIFIC COAST MOSSES. 31 



Leptohymenium duplicate- serratum, Ilampe. 



Hab. on trees in California, Bauer. 

 This species is still more variable than the former. 



UYPNUM, Dill, 

 g 1. TI1UIDIUM, Schp. Uryol, Kur. 



207. H. Blandowii, Web. & Mohr. 



Hab. Fort Colville, Lyall. 



208. H. crispifolium, Hook. 



Hub. N. W. America, Menz.; on shaded ground and rocks, Oakland, etc., 

 Bol. ; Vancouver Island, Wood. 



209. H. (Leskea) laxifolium, Hook. 



Hab. coast of X. W. America, Mem. 



Nothing like this species of Hooker has been found in California by recent col- 

 lectors. It may be a variety of the former species, or appears, at least, to belong to 

 this section. 



210. H. remotifolium, Grev. 



Hab. N. W. America. 

 An obscure species. 



211. H. Whippleamim, Sulliv. 



Hab. California, Big. 



212. H. leuconeurum, Sulliv. et Lesqx., Musci Exsicc. Amer., Ed. 2d. Hypno 



Whippleano peraffine, cscspite densiore, operculo breviore, pedicello laevi 

 etc, distinguendum. 



Hab. on the trunks of Quercus agrifolia, Oakland ; in woods, but more com- 

 mon on moist soil of shaded hillsides, Oakland. 



213. H. calyptratum, Sulliv. 



Hab. near Los Angeles, on the ground, Big. 



I 2. ISOTHECIUM, Brid. 



214. H. myosuroides, Linn. 



Hab. near San Francisco, dry woods, Big. 

 Perhaps a variety of the next. 



215. H. stoloniferum, Hook. 



Hab. on trees, in the Redwoods ; very common in California, Menzies, Bol., 

 Big. Oregon, as var. B. of H. myosuroides, in Sulliv., Wilkes' U. S.Exp.; 

 Vancouver Island, Wood. 



This species is particularly polymorphous. In order to elucidate the remarka- 

 ble disposition of this moss to modify its form under peculiar circumstances, especially 



(31) 



