268 



FRANCIS RAMALEY 



not properly a part of the communities under discussion. The 

 nomenclature followed is that of Rydberg's Flora of Colorado ^^ 

 Many of the plants have been determined by Professor Aven 

 Nelson of the University of Wyoming and some, especially 

 among the grasses, by Professor A. S, Hitchcock and Dr. P. A. 

 Rydberg. The present writer, however, assumes full responsi- 

 bility for the accuracy of the determinations, and any mistakes 

 are his, not those of the gentlemen named. 



In the hst the commonest species are marked with an asterisk 

 (*) ; names of rare plants, or species seldom found in ordinary dry 

 grassland however abundant elsewhere, are enclosed in parenthe- 

 ses. Figures have the following significance as to flowering 

 period: 1 = Prevernal, 2 = Vernal, 3 = Early Aestival, 4 = 

 Later Aestival, 5 = Autumnal. 



*Selaginella densa, 1 

 (Agropyron pseudorepens) , 4 

 (Agropyron ric.hardsonii) , 4 

 {Agropyron smithii), 4 

 Agropyron tenerum, 4 

 *Agropyron violaceum, 4 

 (Agrostis hiemalis), 4 

 *Avena americana, 3 

 (Blepharineuron tricholepis) , 4 

 Bromus pumpellianus, 4 

 (Calamagrostis hyperborea), 4 

 {Calamagrostis purpurascens) , 4 

 (Danthonia intermedia), 4 

 *Danthonia parryi, 4 

 {Deschampsia caespitosa), 3, 4 

 Festuca ingrata, 3 

 Festuca octoflora, 5 

 Festuca rubra, 4 

 *Festuca saximontana, 3, 4 

 Festuca thurberi, 3 

 Hordeuvi jubatum, 4 

 *Koeleria cristata, 4 

 *Muhlenbergia gracilis, 4 

 Muhlenbergia subalpina, 4 

 {Poa arctica), 3 

 {Poa compressa), 4 

 *Poa crocata, 3 



(Poa epilis), 3 



*Poa interior, 3 



Poa longipedunculata, 4 



Poa patter sonii, 4 



*Poa rupicola, 4 



Poa subpurpurea, 4 



Sitanion brevifolium, 4 



*Stipa comata, 4, 5 



Stipa minor, 3 



Stipa nelsonii, 3 



Trisetum subspicatutn, 3, 4 



Carex deflexa farwelii 2, 3 



*Carex filifolia, 3, 4 



(Carex marcida), 4 



(Carex obtusata), 3 



Carex pennsylvanica, 2, 3 



(Carex pratensis) 4 



(Carex siccata), 4 



*Carex stenophylla, 2, 3 



*Juncus balticus montanus, 3, 4 



(J uncus confusus), 3, 4 



(Juncus longistylis) , 3, 4 



(Allium geyeri), 3 



* Allium recurvatum, 4 



(Calochortus gunnisonii), 4 



*Comandra pallida, 3 



(Eriogonum subalpinum), 3, 4 



18 Rydberg, P. A., 1906, Lc.» 



