SoLiDAGO. COMPOSITE. 223 



curved, forming a short and broad panicle. Involucre closely imbricated. 

 Rays 6-10, rather short. — A well marked species. The plant is sweet- 

 scented, according to Mr. Buckley. 



t t Heads small: scales of the involucre narrow, membranaceous: racemes mostly 

 elongated, forming an ample panicle. 



' 62. S. Leavemvorthii : stem strict, scabrous ; leaves linear, acute, sharply 

 serrate, with ciliolate-scabrous margins, inconspicuously triplinerved, smooth 

 and glabrous ; racemes loose, recurved-spreading, somewhat secund, forming 

 an elongated open panicle ; peduncles villous-pubescent ; (heads large for 

 this subdivision ;) scales of the involucre linear-oblong, very obtuse ; rays 

 small. 



Florida, near Micanopy, &c.. Dr. Leavenworth ! Sept.-Oct. — Stem ap- 

 parently 3 or 4 feet high, terete, simple, puberulent-scabrous throughout. 

 Leaves numerous, about 3 inches long, and one-fourth of an inch wide, ser- 

 rate with small and sharp appressed teeth, entire and somewhat narrowed 

 near the base, with a conspicuous midrib, from which arise two rather ob- 

 scure lateral nerves, veinless except by transmitted light, when they appear 

 minutely reticulated under a lens. Racemes in a simple or compound 

 somewhat leafy panicle (6-12 inches long), loose ; the pedicels slender. 

 Heads fully as large as in S. gigantea. and much less crowded. Rays about 

 12, small and slender ; the disk-flowers nearly the same number. Ovaries 

 minutely pubescent. — Allied in some respects to the S. odora group. 



63. jS. elongata (Nutt.) : stem smooth or minutely pubescent, strict ; 

 leaves lanceolate, acute or acuminate at each end, sparingly serrate, nearly 

 glabrous, obscurely triplinerved (the veinlets reticulated) ; panicle elongated, 

 virgate or narrowly pyramidal ; the racemes at length somewhat spreading 

 and secund ; scales of the involucre Hnear-subulate ; rays small and slender; 

 achenia pubescent. — Nutt. ! in trans. Amer. phil. soc. {n. ser.) 7. p. 327. 

 S. elata, Hook..' fl. Bor.-Am. 2. p. 5, not oi Soland. 



(3. leaves lanceolate-linear, sharply and irregularly serrate ; racemes strict, 

 at length somewhat spreading, but scarcely secund; heads smaller. — S. Can- 

 adensis/3. Hook.! I.e. S. stricta, Less, in Linncea, 6. p. 502.^ (Leaves 

 either smooth and very indistinctly triplinerved, or slightly scabrous with the 

 nerves more evident : varies also with the leaves shorter, the panicle short 

 and obtuse. S. Canadensis, Hook. Sf Am. ! lot. Beechey, p. 145.) 



y. ? leaves larger, somewhat scabrous above, minutely pubescent beneath, 

 sometimes nearly glabrous ; panicle dense, pyramidal, the crowded racemes 

 at length recurved-spreading, secund ; heads larger. — S. elongata [3. Nutt. ! 

 I. c. S. Canadensis, Hook J fl. Bor.-Am. 2. p. 1, as to Arctic specimens. 



Oregon and California (a. &/3.), Me«:ies/ Beechey! Douglas! Nuttall! 

 y. Fort Vancouver, Nuttall ! Mr. Garry ! Straits of Da Fuca, Dr. Scouler! 

 Arctic America, from Slave Lake, Drummond! to Fort Fran khn on the 

 Mackenzie River, Richardson! — Plant 3-4 feet high, in y. stout, but the 

 Arctic specimens more dwarf. Panicle 5-10 inches long, strict and narrow, 

 with the heads about as large as in S. Canadensis: in y. the dense panicle is 

 usually thyrsoid or broadly pyramidal, with the heads fully as large as in 

 S. gigantea ; it is perhaps a distinct species. Rays exserted, but slender 

 and inconspicuous. — This species perhaps extends to extra-tropical South 

 America ; for to it (or to S. linearifolia, DC. ?) we may probably refer a 

 plant collected in Mendoza by the late Dr. Gillies, mentioned in Hook. fl. 

 Bor.-Am. under S. lanceolata. 



64. S. Canadensis {laum., Mu) : stem scabrous-hirsute or villous ; leaves 

 lanceolate, acuminate, sharply serrate, sometimes almost entire, more or less 

 pubescent beneath and scabrous above ; panicle pyramidal or fastigiate, of 



