150 s Rhodora [AucusT 
barium of Hooker's own material of A. mollis, sent to B. D. Greene, 
leaves no question that the northeastern plant is identical with the 
Rocky Mountain species. There is, however, little question that it 
is distinct from 4. Chamissonis to which it was referred by Dr. Gray. 
The latter Alaskan plant is much more pubescent, but less glandular, 
with less attenuate involucral bracts, less pubescent achenes, and 
barbellate rather than plumose pappus. 
Var. petiolaris. Leaves narrow, oblanceolate, all but the very 
uppermost tapering to slender petioles: heads 3-4 cm. broad : invo- 
lucral bracts scarcely 1 cm. long.— A. mollis, Torr. Fl. N. Y. i. 403, 
t. 60 (1843); Goodale, 2d Am. Rep. Nat. Hist. & Geol. Me. 123 
(1862). A. Chamissonis, form, Gray, Syn. Fl. i. pt. 2, 382 (1886). 
MAINE, in spray, Moxie Falls, Somerset Co., 1862 (G. Z. Goodale) ; 
bank of a mountain-brook, Rangeley, July 28, 1879 (Ralph W. 
Rounds): New Hampsuire, Mill Brook, Shelburne, August 2, 1884 
(IF. Deane) ; Gobilldunk Ravine, Mt. Moosilauke, August 26, 1898 
(W. W. Eggleston): New York, Essex Co. (Torrey, l. c.). 
* * Basal leaves rounded or cordate at base. 
A. CORDIFOLIA, Hook. Stem 1.5-6 dm. high, more or less villous 
throughout, glandular above: basal and lower cauline leaves ovate, 
coarsely dentate, rounded or cordate at base, slender-petioled ; upper 
short-petioled or subsessile: heads 1 to 8, slender-peduncled, 5-7 
cm. broad: involucre villous, especially at base; its lanceolate to 
oblong acuminate bracts 1.3-2 cm. long: rays about 15: achenes 
hirsute: pappus white, barbellate.-— Fl. Bor-Am. i. 331 (1834): 
Torr. & Gr., Fl. ii. 450 (1843) ; Gray, Syn. Fl. i. pt. 2, 381. (1886) ; 
Britton & Brown, Ill. Fl. iii. 471, fig. 4025 (1898). A. mollis, Gray, 
Man. ed. 3, 231 (1862), as to Lake Superior plant, not Hook. A. 
Chamissonis, Gray, Syn. Fl. i. pt. 2, 381 (1886); Wats. & Coult. in 
Gray, Man. ed. 6,292 (1890); Britton & Brown, Ill. Fl. iii, 472, 
(1898), as to Lake Superior plant, not Lessing. A. /anceolata, 
Britton, Man. 1023 (1901), as to Lake Superior plant, not Nutt.— 
Yukon to South Dakota, Colorado, Utah, Nevada, and California : 
MICHIGAN, Copper Harbor, Keweenaw Co., 1849 (7. D. Whitney). 
GRAY HERBARIUM. 
