148 . Rhodora [AucusT 
heads 1 to 3, apparently 3-5 cm. broad: involucral bracts glandular- 
villous at base, ciliate on the margin, otherwise sparingly puberulent 
or glabrate, oblanceolate, acuminate, about 1 cm. long: rays 10 to 15, 
3-toothed: achenes hispid: pappus barbellate, cream-white. — Fl. 
527 (1814). A. angustifolia, Torr. & Gray, Fl. ii. 449 (1843), in 
part, not Vahl. A. alpina, Gray, Syn. Fl. i. pt. 2, 382 (1886), in 
part, not Olin. A. alpina, var. Lessingit, Fernald & Sornborger, l. c., 
in part, not Gray.— LABRADOR, described from material collected by 
Colmaster; banks of a mountain brook, at 100 m. altitude, Ramah, 
August 20-24, 1897 (J. D. Sornborger, no. 157, in part); Nain 
(Sandberg). 
+ + Leaves prominently and regularly dentate. 
++ Pappus barbellate, white or whitish. 
= Pappus bright white. 
A. chionopappa. Stem 0.7-3.5 dm. high, villous throughout with 
flat white hairs: leaves 3 to 5 pairs, lanceolate to narrowly ovate, 
thin, serrate-dentate, sparingly villous or glabrate, mostly confined to 
the lower half of the stem; the basal 0.5-1.3 cm. long, on very long 
slender petioles; the lower cauline petioled, the upper sessile and 
much reduced: peduncles 0.5-1.5 dm. long, bracteate, 1-3-flowered : 
head 3-4 cm. broad: involucre villous throughout, densely so at base; 
the linear- or lance-attenuate bracts 7-10 mm. long: rays ro to 15, 
bluntly 3-toothed: achenes 3.5-5 mm. long, densely Setulose; the 
ascending white setae barely one-half the diameter of the achene: 
pappus bright white, in fruit 5—6.5 mm. long.— QUEBEC, wet calcare- 
ous banks of the Grand River, Gaspé Co., in anthesis, June 30—July 
3, 1904 (G. ZZ. Richards & M. L. Fernald); wet cliffs at 500-550 
ft, Grande Coupe, Percé, old fruit, August 19, 1904, Bonaventure 
River, fruit, August 5-8, 1904 (Collins, Fernald & Pease): NEw 
Brunswick, Sisson Gorge, Tobique River, July 25, 1900 (G. U. 
Hay, no. 72). A beautiful species characteristic of the calcareous 
cliffs of northern New Brunswick and the Gaspé Peninsula. Near- 
est related to 4. arnoglossa, Greene, of the Black Hills, but differing 
in its thinner slender-petioled basal leaves, its more villous stem, and 
its villous involucre. 
= = Pappus cream-white. 
A. gaspensis. Stems 3-4 dm. high, villous below, glandular- 
