BRIEFER ARTICLES 
QUADRAT STUDIES IN A MOUNTAIN GRASSLAND 
In connection with an extended study of dry grassland areas in the 
mountains of Colorado, the writer has examined a large number of meter 
square quadrats. A report* already published deals with 16 quadrats 
located at different stations in Boulder Park, Tolland, Colorado (alti- 
tude 8889 feet). In the present paper the vegetation is described for 
a series of 158 quadrats in the same park. These extend 138 m. in an 
east-west line, with an additional row of 20 running south from quadrat 
45. The general slope is toward the west, with consequent exposure 
to prevailing winds 
Each quadrat was studied and recorded separately, according to the 
plan described in an earlier paper.2. The records for all quadrats of 
each society were then added and averaged. Apparently this kind of 
work does not appeal to most ecologists, as I have found no published 
figures on xerophytic grasslands that could be used for comparison. 
ix minor assemblages of plants are included in the quadrats studied. 
The list, together with the quadrat numbers, follows: 
Xerophytic ridge (Erigeron multifidus society)... ..........0000 eee eee 1-16 
Xerophytic slope (Muhlenbergia-Comandra society).......... 37-76, 139-158 
Xerophytic slope (Muhlenbergia-Antennaria anaphaloides society) .... . . 117-3 
Xerophytic slope (Muhlenbergia-Aragallus society) 
Hypoxerophytic slope (Muhlenbergia-Danthonia society) 32-36, 77-91, oe 
MACME BI et ee ee ee ee 1-126 
The systematic list which forms the chief part of this article is pre- 
pared from collections made in the midsummer of 1914; censuses were 
made at that time and verified in 1915. It will be seen that grasses 
form a large part of the vegetation, 18 species out of a total of 79. Sedges 
are not so important as is often the case in mountain grasslands or 
indeed as in other parts of the same park. There is an entire absence 
* RaMALEY, F., The relative importance of different species in a mountain grass- 
land. Bor. Gaz, Ge: 1§4-1I57- 1915 
2 ——___ ae amount of bare couaa in some mountain grasslands. Bor, GAz. 
57:526-528. 1 
Botanical pa, vol. 62] [70 
