200 Wyoming Experiment Station. 



Cystopteris fragilis, (L.) Bernh. Schrad. Neues. Journ. Bot. i, part 2, 

 27 (1806). 



Common; Pole Clreek, June 2, 1894 (No. 97); Mexican Mines, 

 July 20, 1894 (No. 587). 



Notholsena sinuata, Kaulf. 



A specimen by B. C. Buffum, July 8, 1892 ; no other data. 



Pteris aquilina, L. Sp. PI. 1075 (1753). 



Teton Mountains, August 21, 1894; Laramie Peak, August 6, 

 1895 (No. 1601). 

 Woodsia Oregana, Eaton, Can. Nat. ii, 90 (1865). 

 Centennial Hills, August 16, 1895 (No. 1682). 



Woodsia scopulina, Eaton, 1. c. 



Much more frequent than the preceding; in crevices and on 

 rocky ledges throughout our range. 



Teton Mountains, August 21, 1894 (No. 951); Laramie Peak, 

 August 6, 1895 (No. 1594). 



SELAGINELLACE^. 



Selaginella rupestris, Spring, in Mart. Fl. Bras. i. part 2, 118 (1840). 

 On a dry, naked ridge near table Mountain, June 28, 1895 (No. 

 1345). 



MUSCI.* 



Ceratodon purpureus, Brid. Bryol. Univ. i, 480 (1826). 



Head of Pole Creek, May 18, 1895 (No. 1211 in part). 

 Desmatodon latifolius glacialis, Schimp. Syn. 157. 



Nearly alpine ; La Plata Mines, August 24, 1895 (No. 1835). 

 Desmatodon Porteri, James, Aust. Muse. Appal, n. 123. 



Cummins, July 30, 1895 (No. 1538 in part). 

 Barbula mucronifolia, Bruch. & Schimp. Mon. xxxviii, t. 23 (1842). 



Cummins July 30, 1895 (No. 1538 in part). 

 Philonotis fontana, Brid. Bryol. Univ. ii, 18 (1827). 



Centennial Valley, August 18, 1895 (No. 1756); LaPlata Mines, 

 August 22, 1895 (No. 1800). 

 Aulacomnium papillosum, Lesq. & James, Man. Moss. N. A. 253. 



Centennial Valley, August 19, 1895 (No. 1746). 



* The Musci were determined and arranged by Prof. J. M. Holzinger. 



