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posa lily, the painted cups, and the wool-joints are present, b. 

 The cactus mesa (Spinosae). c. The Yucca mesa (Ensi- 

 formes). d. The wooded mesa (Sylvestres). e. The 

 brush mesa (Arbustales). f. The mesa canon (Vallicolae). 

 a. Pratenses. The flora of the mesa meadow is com- 

 posed of an admixture of plants both from the plains and the 

 foot-hills. Typical plants are : 



Sorghastrum nutans 

 Stipa comata 

 S. viridula 

 Bouteloua hirsuta 

 B. oligostachya 



Calochortus Gunnisonii 

 Comandra pallida 

 Eriogonum alatum 

 E. flavum 

 E. umbellatum 



Atheropogon curtipendulus Polygonum Douglasii 



Koeleria cristata 



Poa triflora 



P. interior 



P. pseudopratensis 



P. j unci folia 



P. confusa 



Festuca octoflora 



Agropyron tenerum 



A. pseudorepens 



Elymus brachystachys 



E. villiflorus 



Carex marcida 



C. pratensis 



C. straminea 



C. straminiformis 



Silene antirrhina 

 Lychnis Drummondii 

 Delphinium Penardii 

 D. camporum 

 D. Nelsonii 

 Anemone cylindrica 

 Pulsatilla hirsutissima 

 Argemone intermedia 

 Potentilla effusa 

 Drymocallis fissa 

 Lupinus Plattensis 

 L. decumbens 

 Geoprumnon succulentum 

 Astragalus nitidus 

 A. goniatus 



C. Pennsylvanica vespertina Tium Drummondii 

 C. umbellata brevirostris Aragallus Lambertii 

 Tradescantia Universitatis A. sericeus 

 Yucca glauca Psoralea tenuiflora 



