59 
494. A. novi-belg’ii, L. 
A . longifolius, in Manual, 5th Ed. 
Low ground near the north end of Lake Calumet; rare. September, 
1884-85. 
Glencoe; common, Babcock. 
495. A. prenanthoides, Muhl. 
Near Chicago, University of Chicago Herbarium . (B.) 
496. A, punieeus, L. 
Moist woods and swamps; common, especially south. September — 
# 6* October. (B.) 
The white-rayed form is quite common near Lake Calumet. 
497. A. punieus, L., var. lucidulus, Gray. 
Yar. mmineus, T. & G. 
With the type; rare. September. (B.) 
Nearly or quite smooth. 
~f"498. A. umbellatus, Mill. Double-bristled Aster. 
Diplopappus umbellatus , T. & G. 
Moist places ; infrequent south. August — September. 
499. A. linariifolius, L. Double-bristled Aster. 
Diplopappus linariifolius, Hook. 
Dry soil; common. September. 
A form with pure white rays is occasionally found. 
500. A. ptarmicoides, T. & G. 
Sandy soil. September. 
Rogers Park ; rare. Hyde Park, south and southeast; frequent. 
A form growing at Englewood, possibly Yar. lutescens, Gray, is 
reported by Prof. Hill as follows : Some plants with yellowish 
rays and decidedly yellow disk flowers; others nearly white; heads 
smaller than normal; leaves nearly or quite clasping, long linear- 
lanceolate and inclined to be smoother than ordinary; something 
like Solidago Riddellii; heads about J-inch in diameter; involucre 
more cylindrical than in A. ptarmicoides, and smaller. A remark- 
able form appearing as if a hybrid between A. ptarmicoides and 
Solidago riddellii or tenuifolia, both of which are common in the 
same locality, and all grow more or less intermingled. If crosses 
between Asters and Golden-rods be possible, I should take this 
for one. 
