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COCKERELL: NortTH AMERICAN SPECIES OF HyMENOxys 489 
more approaching 4. Richardsoni macrantha, from South Park 
(G. Engelmann, August 24, 1881); this has the pappus-scales not 
so long-aristate. Better material is needed of these plants. 
6. Wet Mountain Valley, July 25, 1872, John H. Redfield. 
Dark red achene-hairs and pappus-scales, which are quite long- 
awned. This cannot well go with subsp. z/z/is, 
7. Wilson Creek, Fremont Co., 7. S. Brandegee. Achene- 
hairs and pappus-scales ferruginous. Like the last but only half 
as tall. 
8. Sangre de Cristo Creek, 7200-8100 ft., July 2, 1900, 
Rydberg & Vreeland. White achene-hairs, slightly ferruginous 
basally ; pappus-scales white with ferruginous base. 
9. Hesperus, 8500 ft., July 15, 1896, Frank Tweedy. Achene- 
hairs ferruginous ; pappus-scales in same head from ferruginous to 
ferruginous at base only. 
10. Durango, August, 1892, Alice Eastwood. Rather a poor 
specimen. Achene-hairs and pappus very pale ferruginous; the 
latter might be called sordid white. 
Ir. Salida, August, 1888, Alice Kastwood. Achene-hairs and 
pappus ferruginous ; stem not noticeably woolly at base. 
12. Saguache Range, gooo ft., August, 1880, 7. S. Brandegee. 
Stem scarcely woolly at base; achene-hairs and pappus-scales 
pale ferruginous. This seems to be 4. floribunda proper, from 
an unusually high altitude. It is a taller plant than the Gunnison 
and Marshall Pass w7z/zs. 
The typical H. floribunda utilis, it appears, grows in Chaffee, 
Gunnison, and northern Saguache Counties, at elevations of about 
2300-3000 m. This is a region of little rainfall,* and it is prob- 
able that this circumstance permits an essentially xerophytic plant 
to reach such high altitudes, without being in any sense a true 
alpine. On the eastern slope of the front range of central Colo- 
rado, where the plant does not grow, the rainfall is at least twice 
as great. However, West Cliff (Wet Mountain Valley), the ap- 
proximate locality of Redfield’s plant (which however is not true 
utilis) had in 1902 nearly as much rain as Colorado Springs, @. ¢., 
over 15 inches. 
* According to mre oo by F. H. Brandenburg of the Weather Bureau, the 
rainfall of Buena Vis 1902 was only 2.81 inches. One suspects here some error ; 
but Saguache had airs :. ee inches, and Salida 7.01. 
