1 6 LESQUEREUX — CATALOGUE 



leaves are much shorter. When growing in the shade, the appearance of the plants 

 is different, the leaves being longer and not appressed closely to the stem, etc. But 

 the true specific characters of this species, as they are given in the description, are 

 recognizable in every form. 



PTYCHOMITRIUM, Brch. & Schp. 



99. P. Gardneri, Spec. nov. Ramificatione, habitu, formaque foliorum, P. poly- 

 phyllo, Brch. & Schp., simillimum, differt : foliis brevioribus, latioribus, 

 siccitate tortilibus vel cirrhatis, reflexis humiditate, margine argutius 

 serratis, retis basilaribus longioribus, superioribus cellulis quadratis con- 

 fertioribus ; capsula in pedicello breviori, pallide ferruginea longiori, 

 operculo longiori rubello persistente, margine minus crenulato ; annulo 

 angustiori revolubili : peristomii dentibus crassioribus, atro-sanguineis, ad 

 basim plerumque trifidis ; calyptra laavi. 

 Hab. on rocks, Dardanelles Canon, Forest Hill, Bol. 



The large size of this moss separates it at first sight from the European species. 

 The male flowers are rarely axillary, generally two to four at the base of the vaginule 

 within the perichsetium. Its color is dark green. 



OETHOTRIGHE^E. 



ZYGODON, Brch. & Schp. 



100. Z. Lapponicus, Brch. & Schp. 



Hab. spray of the Nevada Falls, Yosemite Valley, Bol. ; Cascade Mts., Lyall. 



101. Z. Californicus, Mull. 



Hab. on shaded rocks, Marin Co. ; Dardanelles Canon, etc., Bol. 



Z. coesjntosus, Mitt. A new species formed on sterile specimens collected on 

 Vancouver Island by Lyall, appears, from the description, to belong to this 

 species. 



ULOTA, Mohr. 



102. U. phyllantha, Brid. 



Hab. Vancouver Island, Wood. 



This division of the Orthotrichea3 has not yet any representative from Cali- 

 fornia. 



ORTHOTRICELUM, Ilchv. 



103. O. cupulatum, Iloll'n. 



Hab. on metamorphic limestone rocks, near the Russian River, Ukiah, red- 

 woods, deep gulches, Bol. 



(if.) 



