250 AMERICAN MIDLAND NATURALIST 
smooth and acute; radical long petiolate, spathulate-lanceolate 
and nerved; upper part of the stem and hemispherical calix 
pubescent; stem 3 to 5-flowered, peduncles axillar and terminal. 
Has. On the plains of the Missouri, (around Fort Mandan, abun- 
dant). Flowering in August. Stem 12 to 13 inches high, simple, 
smooth below; lower leaves of the stem much attenuated below, 
3 or 4 lines wide, smooth; peduncles about 2 inches long, pubes- 
cent; flower the size of a daisy, pale blue; rays very numerous. 
Seeds smcoth; pappus double, exterior whitish, interior short, 
simply pilose and rufescent.”’ 
This is decidedly a plant of late summer, commencing to 
flower in the last part of July, when E. asper is fading, and it lasts 
until it is killed by the early frosts. Stems solitary or several, 
ascending, smooth below, sparingly pubescent midways, and more 
densely so in the upper part, usually with short, spreading, or 
even retrorse hairs, and 1 to 5-flowered. Some radical leaves are 
acute, others obtuse, and all have a pair of lateral nerves running 
parallel to the margin for the major part of its length. The leaf 
margins are smooth or sparingly and irregularly ciliate. The 
author’s ‘‘size of a daisy’? must be 2-3 cm. in diameter between 
the peripheral ends of the rays. The color of the rays is the same 
for all flowers of the same plant, but varies for different plants, and 
besides the pale blue ordinary shade an admixture of lilac seems 
to be just as prevalent. This species is extremely pretty, especially 
when its flowers are well developed, and no daisy within this 
state can successfully rival it. ; 
I am just looking at a beautiful specimen of Dr. Greene’s 
which he collected early in its season (July 22) in the summer 
of 1890, at Carberry, Manitoba, as stated in Leaflets II. (1912) 
p. 207. It is perhaps somewhat taller and more luxuriant than my 
North Dakotan plants would be at such an early date, and its 
rays have adopted a rather different natural shade, but nobody 
can or would attempt to question its genuineness. 
4. Engeron pumillus Nutt. 
This is a plant preferring the gravelly plains and the high, 
gravelly hills, and comes from the region whence Nuttall had it 
(Genera ITI: (1818), p. 147). 
5. Erigeron obscurus sp. nov. 
Caules 1-4, erecti et rigidi, 2-4 dm. alti, inferne fusci, usque 
