SoLiDAGo. COMPOSITE. 365 



»•♦»»* Racemes spreading or recurved, secwnd; leaves manifestly triplinerved, or 3-ribbed. 



18. SoLiDAGo Canadensis, Linn. Canadian Golden-rod. 



Stem roughly hairy or villous ; leaves lanceolate, acuminate, sharply serrate, or sometimes 

 nearly entire, rough above, pubescent underneath; panicle pyramidal or fastigiate, the 

 racemes very numerous and recurved ; heads small ; scales of the involucre linear-lanceolate ; 

 rays very short, rather acute ; achenia pubescent. — Linn. sp. 2. p. 878 ; Ait. Ketu. (ed. 1.) 

 3. p. 210 ; Willd. sp. 3. p. 2055 ; Pursh,fl. 2.p. 535 ; Ell. sk. 2. p. 369 ; Beck, hot. p. 188 ; 

 Darlingt. fl. Cest. p. 455 ; Hook. ft. Bor.-Am. 2. p. 1 (excl. ^.) ; DC. prodr. 5. p. 330 ; 

 Torr. 4- Gr. fl. N. Am. 2. p. 223. S. nutans, Desf. ; DC. I. c. 



var. intermedia: stem villous or densely grayish-pubescent; leaves softly pubescent or 

 tomentose underneath, rough above. Torr. ^ Gr. I. c. S. canadensis, /3. Ait. I. c. ; Hook. 

 I. c. S. procera, Desf. ; DC. I. c. 



var. procera : stem villous or roughish-hirsute ; leaves tomentose underneath, rough above, 

 elongated-lanceolate, sparingly serrate or the upper ones entire ; heads larger, with the rays 

 rather longer. Torr. <^ Gr. I. c. S. procera. Ait. I. c. ; Ell. sk. 2. p. 369. 



Stem 3-5 feet high, terete, very finely striate. Leaves pale green, acute at the base, 

 the midrib and two lateral longitudinal nerves whitish and strongly marked, variable as to 

 the degree of roughness and pubescence. Panicle rather large and pyramidal, consisting of 

 numerous secund racemes of very small heads. Pedicels rather short, but slender. Rays 

 7-8. Disk-flowers 3-5. 



Borders of woods, and fields ; common. August - September. 



19. SoLiDAGO SEROTiNA, Ait. Late-JloweHng Golden-rod. 



Stem very smooth and often glaucous ; leaves lanceolate, acuminate, acutely serrate, very 

 smooth except the veins underneath, the margin and usually the upper surface rough ; 

 peduncles slender and rather long, roughish-pubescent ; rays numerous, short ; achenia nearly 

 smooth when mature. — Ait. Kew. (ed. 1.) 3. p. 211 ; Hook.fl. Bor.-Am. 2. p. 1 ; Torr. <^ 

 Gr. fl. N. Am. 2. p. 224. S. gigantea, Darlingt. fl. Cest. p. 455. 



Stem 4-7 feet high, terete, finely striate, sometimes purplish. Leaves 3-4 inches long 

 and 5-8 lines wide, rather remotely serrate with somewhat spreading teeth, acute but not 

 attenuate at the base, strongly 3-ribbed, ciliolate-scabrous on the margin, ftnd more or less 

 rough on the upper surface. Panicle large. Heads middle-sized. Scales of the involucre 

 smoothish, lanceolate, rather acute. Rays 9-12. Disk -flowers 5-9. Achenia pubescent 

 when young, at length nearly smooth. 



Low grounds ; common. August - October. Distinguished on the one side from S. 

 Canadensis by its smooth stem, and on the other from S. gigantea by the rough upper surface 

 of the leaves and the pubescence of the veins underneath. 



