FLORA OF THE YELLOWSTONE NATIONAL PARK. 21 



been observed out of hot spring soil. Spraguea umbellata, 

 Torr, finds a congenial home on the bare gej'serite, and in the 

 same case though more local are Aplopappus uniflorus, Torr 

 and Gray; Mimulus namus, Hook and Arn.; Gastilleia minor, 

 Gray ; Orthocarpus luteus, Nutt., and Glyceria airoides, Thurb. 



Spraguea umbellata, Torr. 



* Chrysopsis villosa, Nutt. 



* Aplopappus uniflorus, Torr and Gray. 

 Chaenactis Douglasii, Hook and Arn. 



*Gnaphalium Sprengelii, Hook and Arn. 

 Senecio canus, Hook. 

 Arctostaphylos Uva-ursi, Spreng. 



* Mimulus nanus, Hook and Arn. 



* Cautilleia minor, Gray. 



* Orthocarpus luteus, Nutt. 



*Lycopus Virginicus, L., var. pauciflorus, Benth. 

 *Brunella vulgaris, L. 



Chenopodium glaucum, L. 



Chenopodium capitatum, Wats. 



Monolepis chenopodioides, Moq. 

 *Salicornia herbacea, L. 

 *Eriogonum flavum, Nutt. 

 *Rumex maritimus, L. 



Euphorbia serpyllifolia, Pers. 

 *Juncus tenuis, Willd., var. congestus, Englm. 

 *Ruppia maritima, L. 



Potamogeton pectinatus, L. 



* Trilochin maritimum, L. 

 Eleocharis palustris, R. Br. 

 Eleocharis olivacea, Torr. 



*Panicum dicliotomum, L., var. pubescens. 

 *Spartina gracilis, Trin. 

 * Glyceria airoides, Thurb. 

 Juniperus communis, L., var. alpina, Gaud. 



* Botrychium ternatum. Swartz, var. australe, Eaton. 

 Pteris aquilina, L. 



