940 FLORA. 



ovate or oval, short-acuminate. 7-40 cm. long, 2-12 cm. wide, narrowed into 

 margined petioles, sharply and coarsely serrate; upper leaves sessile, ovate to 

 oblong, acute or acuminate, more or less serrate, smaller; rays 5-7, large; bracts 

 of the involucre oblong, obtuse; achenes glabrous or nearly so. In rich woods, 

 Me. and Ont. to Ohio, south to Va. July-Oct. 



35. Solidago rupestris Raf. ROCK GOLDENROD. (I. F. f. 3703.) Stem 

 slender. 6-9 dm. high. Leaves thin, 5-12 cm. long, 6-IO mm. wide, acuminate 

 at .the apex, narrowed at the base, sessile, or the lowest petioled, glabrous; heads 

 small, 3 mm. high, secund on the short spreading branches of the small panicle; 

 rays 46, short; bracts of the involucre thin, linear; achenes small, nearly glabrous. 

 Rocky banks of streams, Penn. to D. C., W. Va., Tenn. and Ind. Aug.-Sept. 



36. Solidago serotina Ait. LATE GOLDENROD. (I. F. f. 3704.) Stem 

 stout, 9-25 dm. high, glabrous, sometimes glaucous. Leaves thin, sessile, or the 

 lowest petioled, glabrous on both sides but more or less rough-margined. 7-15 cm. 

 long, 4-25 mm. wide, acuminate at the apex, narrowed at the base; heads 5-7 mm. 

 high; bracts of the involucre oblong, thin, obtuse; rays 7-15, rather large; achenes 

 finely pubescent. In moist soil, Newf. to Br. Col., south to Ga., Tex., Nev. and 

 Ore. Aug. -Oct. 



Solidago serotina gigantea (Ait.) A. Gray. Leaves hispid or pubescent on the lower 

 surface, at least on its prominent veins. With the type, at least in the East. 



37. Solidago Missouriensis Nutt. MISSOURI GOLDENROD. (I. F. 3705.) 

 Stem rather slender, 9-15 dm. high. Leaves firm or thick, those of the stem ses- 

 sile, acuminate at the apex, narrowed at the base, 5-10 cm. long, very rough- 

 margined, entire, or sparingly serrate with low sharp teeth, the basal and lowest 

 ones larger, spatulate, petioled; heads 5-6 mm. high; bracts of the involucre 

 oblong, greenish-tipped, obtuse, or the inner acute, thick; rays 6-13. short. On 

 dry prairies, Manitoba and Minn, to Tenn., Wash., Neb. and Tex. Autumn. 



38. Solidago Shortii T. & G. SHORT'S GOLDENROD. (I. F. f. 3706.) Stem 

 slender, 6-12 dm. high. Leaves sessile (the lowest petioled ?), acute or acuminate at 

 the apex, glabrous on both sides, the larger 5-10 cm. long, 10-12 mm. wide, 

 sharply serrate with rather small and distant teeth, the upper gradually smaller, 

 sparingly serrate, or entire; heads about 6 mm. high; involucre narrowly campanu- 

 late, its bracts linear-oblong, obtuse; rays 5-7. rather small. On rocks at the 

 Falls of the Ohio River and in northwestern Ark. July-Aug. 



39. Solidago Gattingeri Chapm. GATTINGER'S GOLDENROD. (I. F. f. 

 3707.) Stem slender, 6-9 dm. high, branched at the inflorescence. Leaves firm, 

 glabrous beneath, rough above, ciliolate, the lower and basal ones acutish, 7-15 cm. 

 long, 12-20 mm. wide, serrate with low distant teeth, narrowed into margined 

 petioles, entire, sessile; heads 4-5 mm. high; bracts of the involucre oblong, very 

 obtuse; rays 6-10; achenes puberulent, or glabrous below. In dry soil, Tenn. and 

 Mo. July-Aug. 



40. Solidago Canadensis L. CANADA GOLDENROD. (I. F. f. 3708.) Stem 

 stout, puberulent-pubescent, or hirsute, 6-25 dm. high. Leaves acute at each end, 

 the lower ones sharply serrate and petioled. 7-15 cm. long, 8-25 mm. wide, the 

 upper smaller, entire, sessile; heads 3-4 mm. high, very numerous; bracts of the 

 involucre linear, obtuse or acutish; rays 9-15; achenes glabrous or somewhat 

 pubescent. Usually in dry soil, N. B. to the N. W. Terr, and Br. Col., south to 

 Fla. and Ariz. Aug.-Nov. 



Solidago Canadensis procera (Ait.) T. & G. Leaves less serrate, sometimes all 

 entire, cinereous-pubescent with short appressed hairs. With the type. 



Solidago Canadensis glabrkta Porter. Stems 6-12 dm. high, glabrous or nearly so 

 below, puberulent above : leaves narrowly lanceolate, smooth above, pubescent on the 

 veins beneath ; panicles and heads smaller than in the type. Me. to northern N. Y. and 

 Penn. 



Solidago Canadensis scabriuscula Porter. Leaves shorter, sparingly serrate or entire, 

 rough above, rugose beneath; heads mostly larger than in the type. N. Y. and Penn. 

 to Fla. and Tex. 



Solidago ?Canadensis gilvocanescens Rydberg. A foot high, or less, leafy, canes- 

 cent, yellowish; leaves remotely serrate above the middle, or entire; inflorescence dense; 

 heads smaller than in the type. Minn, to Mont, and Kans. 



41. Solidago nemoralis Ait. GRAY OR FIELD GOLDENROD. DYER'S 

 WEED. (I. F. f. 3709.) Slender, 1-6 dm. high, finely and densely pubescent. 



