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by some previous author, but this chance is not very great, for 

 the North American species have been considerably studied, and 

 doubtless most of the forms deserving recognition as species are 

 fairly well understood. The plant may be characterized as follows: 

 Hieracium Floridanum. — Stem tall, stout, villous-hirsute 

 below the middle, over i m. high, paniculately branched above 

 the middle, the branches slender, erect-ascending ; no basal leaves 

 at flowering time : stem leaves broadly oval to elliptic or ovate- 

 oval, firm, the lower 9 cm. long, 4-5 cm. wide, rounded at the 

 apex, subcordate-clasping at the base, loosely villous-hirsute on 

 both sides, entire, with numerous minute glands on the margins, 

 the upper leaves gradually smaller, the uppermost acute : panicle 

 6 dm. long or more, naked, ample, its branchlets glandular ; 

 heads very numerous, 20-2 5 -flowered ; involucre 8 mm. high, its 

 principal bracts in one series, linear, acutish, glandular, the much 

 shorter outer ones triangular-lanceolate, acuminate or acute : 

 achenes columnar, 4 mm. long, truncate, slightly narrowed above, 

 a little shorter than the brown pappus. 



The sessile half-clasping leaves extend down the stem to the 

 fourth node above the mass of fibrous roots. The}" are very 

 numerous and the internodes not over 2 cm. long. From the 

 character of the achenes the species is apparently more nearly 

 related to H. Marianum than to any other North American plant. 

 — N. L. Britton. 



A new Arnica from Oregon. — Arnica aurantiaca. Sub- 

 alpine, low, forming dense patches, the simple monocephalous 

 stems 2—6 inches high from horizontal rootstocks : leaves in about 

 5 pairs, the lowest broadly oblong, obtuse, the others broadly 

 lanceolate, attenuate-acute, all entire, glabrous or nearly so, except 

 the woolly-ciliate margin : slender peduncle sparingly woolly- 

 hairy and minutely glandular : involucre broadly turbinate, its 

 thin lanceolate bracts about 10, scarcely biserial, narrowly lanceo- 

 late, woolly at base, the margins obscurely glandular-ciliolate : 

 flowers both of ray and disk orange-color : achenes silky-villous : 

 pappus white, barbellulate. 



At the head of Keystone Creek, Wallowa Mountains, Oregon, 

 at about 7,000 feet, Aug., 1900, W. C. Cusick. A small sub- 

 alpine species, uncommonly well marked by its deeply colored 

 flowers, and silky achenes. 



Arnica crocina is a name to be assigned the A. crocca of 

 Pittonia, 4: 159, in view of the fact that the Linnaean name of 



