162 AMERICAN MIDLAND NATURALIST 
is a thyrsus, narrow at the top, widened at the base. It was 
collected in dry, sandy soil at Staples, Todd County, on August 
Os 21Qia: 
The var. porrecta is usually slender and middle-sized, and 
somewhat variable. The corresponding North Dakota variety 
is var. multiplex. The type was collected at Staples, Todd County, 
on August 9, 1911. Another form from Wanbun, Mahnomen 
County, collected July 28, 1911, has ampler foliage. 
The var. propinqua has the var. angustata of North Dakota 
as its nearest corresponding form. The type was collected at 
Staples, Todd County, on August 9, 1911, and a form with ampler 
leaves from Wanbun, Mahnomen County, bears the date of July 
28 LOLI: 
The var. brachiata has a multitude of flower-bearing branches, 
1-1.5 dm. long. The type, being available only as a single plant, 
has a broad, thyrsoid or almost corymbose inflorescence, probably 
caused by arrested or deficient growth at the apex of the stem. 
This condition may be partly accountable for the extraordinary 
length of the branches. Collected in dry, sandy soil at Staples, 
Todd County, on August 29, I9II. 
The var. Chandonnetti is a signally beautiful form with its 
profusion of narrow leaves, the radical 8 cm. and beneath the 
inflorescence 2.5 cm. long, and its narrow, compact inflorescence. 
It was eollected in dry,' sandy soil at Staples, Todd County, on 
August 29, IgII. : 
The var. obesa is a much stouter plant, with thicker stem, 
thicker, larger leaves, the radical 8 cm. long, the lower in the 
inflorescence 6 cm. long, the uppermost bract-like, 1 cm. long. 
Heads about 90. Inflorescence up to 6.5 dm. long, conspicuously 
pedicelled, the lowest ones often reaching a length of 5 cm. 
The corresponding North Dakota plant is var. opima. Collected 
in dry, sandy soil at Staples, Todd County, on August 29, 1911. 
‘While in North Dakota differences in soil constituents, moisture 
and elevation are the essential factors in the creation of the diff- 
erent varieties, in Minnesota the all-important condition seems to 
be a dry,sandy soil, and Staples appears to be for this scariosa- 
group the ideal locality and the real paradise. 
