254 AMERICAN MIDLAND NATURALIST 
Nuttall actually meant when introducing these species names, 
and Asa Gray in his Synoptical Flora suppressed E. asper. Dr. 
P. A. Rydberg in his Flora of Colorado retained E. glabellus (as 
to the name), but the manuals suppressed it and accepted E. 
asper, as they did not believe in the existence of two separate, 
independent species. The plains of. Missouri in North Dakota 
furnished the types for these two Nuttallian species. In taking 
up the subject of them as they present themselves to me in their 
home country, I acknowledge in the first place my debt to Dr. 
Edward L,. Greene for his valuable advice and suggestions and 
nis willingness on his own initiative to place precious material 
at my disposal. 
1. Erigeron asper Nutt. 
Nuttall ranges E. asper (1. c.) under “§1. Stem simple,” 
and this is his original description: 
“3. *asperum. Hirsutely scabrous; stem about 2-flowered, 
slender; leaves lanceolate-acute and entire; flower hemispherical, 
- white. Has. On the plains of the Missouri. Flowering in August. 
Stem solitary, scarcely 12 inches high, covered with short and- 
very hispid hairs in common with the leaves. Leaves narrow; 
radical ones spatulate-lanceolate. Peduncles 2 or 3, subterminal, 
the lateral one longest’’....‘“‘Rays numerous, white. Pappus 
double, interior simply pilose, of about 20 rays, much longer than 
the smooth seed, slightly rufescent.”’ 
Dr. J. F. Brenckle of Kulm, La Moure County, of this state, 
has kindly withdrawn from his herbarium and lent me some 
daisy material representing no doubt the real plant of Nuttall. 
Two plants collected by him on June 20, 1903, part of his sheet 
numbered 38, from low prairie at Kulm, and four small plants 
out of five from another sheet collected by O. A. Stevens at 
Valley City, on June 8, 1910, the last ones defined by the collector 
as E. caespitosus Nutt., have the “hirsutely scabrous’”’ indument 
and also the “white rays’’ as outlined in Nuttall’s description. 
The stems have from 1 to 4 flowers. Nuttall’s plant was collected 
in August, and though I have no doubt that some belated indi- 
viduals would linger into that month, the real flowering period 
for this species and its allies is June and the first part of July. 
The Valley City plant belongs to the Red River of the North 
basin (Sheyenne River), but the Kulmf plant is from*a’ territory 
Aad 
