196 PITTONIA. 
sepals ovate-acuminate, thinly hirsute, scarcely reflexed ; 
petals 5, large, more than 4 inch long, cuneate-obovate to 
obovate-oblong, very obtuse: achenes thick, smooth, rounded 
in outline, carinate on the back by a green-herbaceous 
margin confluent with the long slender not at all recurved 
but straight style. 
Collected at Alto Pass, in southern Illinois, 21 April, 
1900, by Mr. Carl F. Baker, who reports that it occurs in 
large patches’on moist open hillsides. Itis of the group to 
which belong R. hispidus and R. fascicularis and more like 
the latter yet differing widely in aspect by its much greater 
size, uncut basal leaves, these being fully as broad as long, 
and only slightly if at all lobed; while in the achene with 
its long straight style we have an excellent technical 
character. The region is one which has yielded already a 
number of rather local species in various genera. 
R. porrrus. Alargestout perennial with very coarse fleshy- 
fibrous roots, but the stems though thick, weak and partly 
reclining (perhaps ultimately rooting at the upper joints), 
polished and shining but sparsely pilose-pubescent, 2 feet 
long while yet in early flowering: lowest leaves on petioles 
of 6 or 8 inches, ternately divided, the segments cuneate at 
base and incised, the lobes and teeth not acuminate, scarcely 
even acute: sepals very thin, ovate, apparently never 
reflexed but very promptly deciduous: corolla 14 inches 
broad, the five petals broadly obovate, very obtuse: achenes 
smooth, moderately compressed, not large, surmounted by 
an ensiform but acuminate beak as long as the body, de- 
cidedly incurved but its small tip abruptly recurved, the 
whole forming a somewhat depressed-globose head. 
A subalpine plant of the mountains of eastern Oregon, by 
W. C. Cusick (n. 2382 of my set), wrongly named R. masr 
mus, Greene, which is a very different almost maritime and 
