252 DESCRIPTION OF ASTERS ; CURVESCENTES 
Pa., Allegheny Co., Canonsburg, '63, ogee in hb. Porter. 
Pa., Bucks Co., Phoenit ville, Au. 14, '96, W. K. Fisher in hb. Bu. 
Pa., Lancaster Co., near Steelville, July u 9o, Jn. K. Small in hb. Porter ; 
Octoraro, Small in hb, A. Ride n. 
y Coll, A. €. Fori” icd no. vidi in U. S. Nat. Hb. 
, Newcastle, W. M. Canby, i . Can 
xn Mt. Cuba, Se. 24, 95, Jos em See iste hb., in hb. M. Y. Bot. Gar. 
D. C., streams ; typical locality in present Zoological ai near end of Lanier 
Hts. Brook, Se. 24, '88, etc., some plants still surviving Apr. 21, 1901, then just 
opening : their first radicals and about to lose their primordials; Bu., in hb. Zu., and in 
Ga ars Run, near Rock Cr., July 12 and 19, '86, Æ. W. Henshaw, 
in U. S. Pu 
D. i near Washington, m 19, '86, Z. F. Ward in hb. Bu. 
Md., Cumberland, ’94, coll. Frank Schriver in hb. N. Y. Bot. Gar. 
Va., Potomac i near rast Run, Zz. 
Va., Stony Man ; Se. 4, 1901, E. S. Steele in hb. NV. 
Kyi, Sy seated ? ah C. W. Short as ** A. icol: in I Buckley, 
now in hb. Mo. Bot. Gar. 
Ohio, 2 de Richardson, no. 217620 in U. S. Nat. Hb. 
5» c le Rock, Se., 1850, Z. R. Gibbes, hb. N. V. Bot. Gar. 
History. Plants of this species were collected early in the 19th 
century and united by Boott with his specimens of A. Schredert ; 
were similarly classed by Torrey and Gray, together with A. 
Schreberi as A. macrophyllus 8 (Fl. N. Am.); fide Torrey herba- 
rium ; were so classed by Canby ; and by others later were merely 
consigned to A. macrophyllus in general. 
In 1881, Prof. L. F. Ward remarked of this species, under the 
name of A. macrophyllus, in his Flora of the District of Columbia, 
p. 88, “The form [A. curvescens] found here differs from the 
northern from [4. macrophyllus] in the size of the leaf and heads, 
and in the number of flowers in the heads, and seems to be inter- 
mediate between that and A. corymbosus.” 
Dr. Geo. Vasey said of this form to me in 1888, “ It surely is 
a different plant from A. macrophyllus, and intermediate on account 
of its smaller heads and form of inflorescence and different bracts.” 
I had myself regarded it as distinct since beginning its study 
in 1886, but until 1898 deferred publishing it, in order to com- 
pare its development in other localities. 
Variants : 
40° Rotundate form. Small plants differing in their conspicu- 
ous we caulines which are broadly oval, and slender-petioled. 
th the type, near Washington, D. C., Bu. 
