454 MK. N. D. SIMPSON ON THE PLANTS OF 



Elymus dasystachys, Trin. 



No. 116. Stony deserts on hill-sides and in plateau valleys np to 20.50 m. 

 under the driest vegfltative conditions. In the Suok Valley and on the N. side 

 o£ the Great Altai Range. 



No. 453. Dry valley steppe, alluvial soil often where flooded and where 

 there is a little moisture, on the banks of the Ulu Kem, 



No. 453 agrees in structure with A', dast/staclii/s, but the plant is remarkable 

 for its slender form and its one-flowered spikelets. 



Distr/liiition. Siberia, Mongolia, Turkestan, China, Japan, Pamir, and 

 N.W. India. 



Elymus gigantevs, VaU. 



No. 170. Medium dry conditions, sand dunes and sandy silt deposits just 

 above the water-table ; sandy plains of the Upper Irtish basin. 

 ])'istrU)utiov. Russia and the Altai region. 



PTERIDOPHYTA. 



FILICINEiE. 



Nephrodii'm SPiNULOSUM, Desv. ? 



No. 30y a. Picea and Pinus forests under the wettest conditions, belonoinor 

 to the typical Amil River flora. 



This specimen and the following are too young for certain identification. 



Nepheodium SPINULOSUM, Desv., var. bilatatum, Hook. ? 

 No. 308 h. 



Distribution (of species) . Europe, Asia, Eastern Himalayas, and N. Amei iea, 

 Christe7isen. 



Oystcptebis eeagilis, Linn. 



No. 312. On a basalt clifi", Amil River, Petrapolowsk. Used by the 

 Russians for medicinal purposes. 



Distribution. Arctic, antarctic, and temperate regions and alpine tropical 

 regions, Cliristensen. 



POLYPODIUM DkYOPTERIS, L'inn. 



No. 308 c. 



Distrihiitioii. Europe, Asia, W. America, arctic and temperate rcions 



Cliristensen, 



