CocKERELL: NorrH AMERICAN SPECIES OF HYMENoxys 475 
Montana. — Helena, July 27, 1887, R. S. Williams. Appear- 
ance of subspecies /7gwlaeflora ; bracts agree; achenes broad but 
long, with copious ferruginous hair; pappus-scales ferruginous at 
base, fairly long-awned ; the achene is more like that of the Assin- 
iboia plant than that of typical subspecies /igu/aeflora. Also col- 
lected at Helena by Rev. F. D. Kelsey, July 4, 1888. 
CoLtorapo.—Rocky Mts., lat. 40-41°, 1868, Geo. Vasey. 
Rather tall. 
It will be observed that it is in northern Wyoming and Mon- 
tana that subspecies “igulaeflora passes into subspecies pumila, 
whereas in southern Wyoming and northern Colorado it passes 
into subspecies sacrantha. One of the Helena sheets (Ke/sey) 
shows conspicuous rays which seem to have been orange, recalling 
the plant of Assiniboia. The plant, however, is 15 cm. high. 
' Hymenoxys Richardsoni macrantha (A. Nelson) 
Picradenia macrantha A. Nelson, Bot. Gaz. 28: 130. 1899. 
Professor Nelson says, allied to P. ligulaeflora, “from which 
its larger size, conspicuous rays, longer peduncles, fewer and less 
resinous heads serve to separate it.” 
The following material is referred to subspecies macrantha : 
Wyominc. — Fort Steele, 4. Melson; clayey draws, Cooper 
Lake, Albany Co., June 17, 1g01, Leslie N. Goodding ; Centen- 
nial Hills, August 19, 1895, A. Nelson.” 
These localities are all,in the southern part of the state. The 
Centennial Hills plant may be called var. Nelsoni; it is remark- 
able for its gigantic heads, up to 2 cm. across, exclusive of the 
rays, which appear to have been very pale. Its achenes are broad 
and reddish, and the shining white pappus-scales are barely two- 
thirds the length of the disc-corolla. It is in the herbarium of 
the University of Wyoming. The Cooper Lake plant is labeled 
£ ligulacflora, and has the stature of that plant, but the large 
flowers, with conspicuous orange rays, are precisely those of sub- 
Species macrantha, The inner bracts are green-tipped ; peduncles 
hardly so long as in typical macrantha ; achenes rather short; 
* Professor Nelson writes me that the soil at the Centennial Hills is mostly gravelly 
and free from alkali, while that at Fort Steele where subspecies ”acrantha occurs is a 
heavy saline clay. 
