1915] BRIEFER ARTICLES 157 
followed in order by the species of Festuca, Poa, Agropyron, Koeleria, 
and Stipa. If the dry grassland were to be named by its chief 
generic constituents, it would be called a Carex-Artemisia-Aragallus- 
Muhlenbergia association. 
From table II it will be seen that in the midsummer of 1913 two- 
TABLE II 
THE CHIEF CONSTITUENTS OF THE VEGETATION OF THE QUADRATS 
Names of plant owe prs nen 
Selagitielia: densa: ee. ie ot ne 4.31 5.95 
Agropyron violaceum.............-.-+++- 2.56 3.41 
Festuca ingrata, saximontana, rubra. ..... 5.75 7.67 
KOcIers cristata Ge sew. eee 2.38 3.47 
Muhlenbergia gracilis and subalpin 6.06 8.08 
Poa crocata, interior, arse ef haa case 3.31 4.41 
eups. comata, minor, Nelsoni so... yi. 2.5 2.00 2.66 
Car LOMA byes ures ne ee a 2.56 3.41 
Carex stenophyila and pennsylvanica..... 6.25 8.33 
astium yeti tale. ep aiwe ess 1.94 2.58 
pineal DANVERS es ces 4.94 6.58 
Aragallus Richardson DSP aS er eae 2.31 3.08 
Be Lenvigie Wiha oh eo ra i Gas 5.62 7.49 
POUL ose Gee re ee yee 49.99 66.62 
TABLE III 
THE MOST IMPORTANT PLANT FAMILIES AND THEIR PART IN THE 
VEGETATION OF THE QUADRATS 
Names of families Epo proms afer alg 
Oatese (to Species). 6 eae ee 25.38 33.82 
Carduaceae (10 species)... >... 20. kee. 11.49 15.390 
Cyperaceae (3 species).....-....-.-..05- . 8.8 11.74 
Rapacens (4 specees) ks cnc ce ws 8 8.50 11.32 
Selaginellaceae (1 pula rede ae oe oe's 6 4.31 5-75 
SOR topck hos SA eo es cas 58.49 77-93 
thirds of the vegetation of the quadrats was made up of plants listed in 
13 items in the first table. A certain few plants that are widely dis- 
tributed do not make up a large percentage of the ground cover and are 
therefore not listed in table II. The most important of these are Juncus 
balticus, Arenaria Fendleri, Sedum stenopetalum, Mertensia Bakeri, and 
Chrysopsis foliosa, each of which was found in 9 or more of the quadrats. 
he five plant families best represented in the quadrats are shown in 
table III.—Francis Ramatey, University of Colorado, Boulder, Colo. 
