OP ARTS AND SCIENCES. 121 



covering the tree with a network of its strong tough roots to the 

 height of ten feet. 



105. NoTHOL^NA Newberryi, Eaton. Throughout the island 

 on rocks in dry exposed places. 



106. Weissia viridula, Brid. 



107. Ceratodon purpureus, Brid. 



108. Barbula rigida, Schultz, var. pilifera. Not before col- 

 lected in America. 



109. Barbula atrovirens, Smith. Also new to America. 



110. Barbula viNEALis, Brid. 



111. Barbula ruralis, Hedw. 



112. Orthotriciium Lyellii, Hook. 



113. Grimmia pulvinata, Hook. & Tayl. 



114. Grimmia trichophylla, Grev. 



115. Hypnum myosuroides, Linn. 

 . Alsia Californica, Sulliv. 



116. Madotheca navicularis, Nees. 



117. FossoMBRONiA LONGiSETA, Austin. 



118. FiMBRiARiA Californica, Austin. 



119. FiMBRiARiA Palmeri, Austin, Bulletin Torrey Botanical 

 Club, 6. 47 ; new species. 



III. Descriptions of Neio Species of Plants, chiefly Calif ornian, with 

 Revisions of certain Genera. 



y Anemone (Pulsatilla) occidentalis. Alpine, more or less 

 villous, stout and often tall : leaves large, long-petioled, biternate and 

 pinnate ; lateral primary divisions nearly sessile ; segments pinnatifid 

 with narrow laciniately toothed lobes ; involucral leaves similar, nearly 

 sessile upon the middle of the stem : flower solitary, white or purplish, 

 an inch broad or more : sepals six or seven : receptacle conical, be- 

 coming much elongated : tails of the linear-oblong akenes at length an 

 inch and a half long, reflexed. — A. alpijia, Hook. Fl. Bor.-Am. ; 

 Torr. & Gray, Flora ; &c., not Linn. Li the mountains, from British 

 Columbia southward to Mt. Shasta and Lassen's Peak ; perhaps also 

 the A. alpina of arctic collectors from Kotzebue Sound, &e., of which 

 specimens are not at hand. It differs from A. alpina of Europe and 

 the Caucasus in its more finely and narrowly dissected leaves, which 

 have also the primary divisions much more shortly petiolulate, and in 

 the lengthened receptacle (sometimes an inch and a half long), which 

 in the other is small and hemispherical. 



