Proceedings of the Club 293 



leptophyllum, Eriocoma cuspidata, PJiacelia linearis, Lygodesmia 

 juncea, natives. 



Hydrophytic formations of the Great Plains include : 



9. The Wet-meadows, covered with grasses and sedges, with 

 species of Calamagrostis, Poa, Agrostis, Spartina and Alopecurus. 



10. The Sand-bar formation, with Salix fluviatilis and Shcp- 

 herdia argentea. 



11. Purely aquatic plants, species of Lemna, Potamogeton, Ba- 

 trachium and Nymphaea. 



Halophytic formations of the Great Plains include : 



12. Salt-marsh formation, with Spartina gracilis, and two spe- 

 cies of Triglochin. 



13. The Alkali-flat formation, with Agropyron Smithii, and sev- 

 eral Chenopodiaceous plants, as Atriplex, Sarcobatus, Dondia, etc. 



Subalpine formations follow : first, the Xerophytes : 



14. The Grass-covered Foothills and Bench lands; with Fes- 

 tnca ovina, Agropyrum spicatum, Ely inns condensatus, and Avena 

 Americana. 



15. Rock-crest formation, with species of Henchera and Eri- 

 geron ; and with the Bitter-root, Leivisia rediviva, the Montana 

 state flower. 



Mesophytic subalpine formations are : 



16. The Poophytic, covering the drier valleys and grassy hill- 

 sides ; the same grasses as in the drier foothills, with addition of 

 more valuable species, especially of Poa, as P. Nevadensis, P. Buck- 

 ley ana and P. lucida. 



17. The Hylophytic or Forest formation, the covering of 

 wooded mountain-sides and pine flats ; all conifers, as Pinus Mur- 



P. albicaulis, Picea Engelmanni, P. Columbiana, 



plexitis 



Abies grandis, A. amabilis, Pseudotsuga mucronata ; besides which 

 occur along streams, Alnus teniufolia, A. sinuata, Betula occiden- 

 talism B. glandulosa and several species of Salix. 



18. The chief Hydrophytic subalpine formation, that of the 

 wet mountain-meadows, luxuriant in grasses and sedges. The 

 most valuable hay plants there are Phleum alpinum ( nearly re- 

 lated to the cultivated timothy), Alopecurus occidentalis, a foxtail 

 grass, and two clovers, Trifolium Bcckivithii, and T. Rydbergii. 



The water plants of the mountain region are practically the ' 

 same in the plains ; as are the halophytes. 



