1908] HARVEY—PRAIRIE-GRASS FORMATION IO05 
some 7.54" high, and each of the branches is terminated by a very 
striking head; yellow drooping rays, 6 to 9 in number and frequently 
3™™ long, surround a deep-brownish columnar head some 4°™ high. 
The prairie cone-flower occurs copiously upon lower and middle 
slopes, extending crestward (fig. 1). In the former locations it fre- 
quently assumes almost facial rank and gives a bright-yellow tone to 
the entire floral aspect. It is a prolific and continuous bloomer, 
dominating the aspect through the month of July and the greater part 
- 1.—Late estival aspect; Ratibida columnaris upon a middle slope; the r uders! 
Jubatum in right foreground. 
Fic 
He ordewm 
of August, and extending up to the middle of September. Ratibida 
‘S @ perennial from a thick root. The achenes are provided with a 
diminutive pappus of one or two teeth, and so lack of mobility and 
Sreat fertility result in its copious abundance in restricted localities. 
It should be recorded that a few specimens with reddish-brown 
ays having yellow tips and bases have been noted. 
a. the time Ratibida is spreading its neutral ray-flowers the 
PWR ®wers of Symphoricarpus appear, reaching their maximum 
“ting two or three weeks later. The wolfberry is of restricted 
