446 COMPOSIT.E. Sekecio. 



Arctic America, from lat. 64°, to the shores of the Northern Sea! Kotze- 

 bue's Sound! &c.— Stems 1-5 inches high. Head large.— Varies greatly as 

 to pubescence, and the short purplish hairs of the involucre are sometimes 

 nearly wanting. 



36. S. Pseudo-Arnica (Less.): glabrous or arachnoid-tomentose at the 

 summit; stem erect, simple, leafy, bearing one or very few [very large] 

 heads; lower leaves oval-oblong, repand-toothed, narrowed into a short pe- 

 tiole ; the upper sessile, lanceolate ; scales of the involucre in few series, the 

 exterior linear, acuminate, as long as the interior; rays many-nerved ; ache- 

 nia glabrous; pappus scabrous, equalling the disk-corolla, DC. — Less, in 

 Linncea, 6. p. 240; Hook.! ji. Bor.-Am. 1 . p. 334, t. 113; DC' prodr. 6. 

 p. 358. Arnica raaritima, Linn. spec. 2. p. 885 (ex. Less.)', Pursh! fl. 2. 

 p. 528; Hook. 6f Am.! hot. Beechey, p. 126. A. Doronicum, Pursh, fl. 

 2. p. 527.' Cineraria carnosa, Pylaie! herb. 



Labrador! and Newfoundland! to Kotzebue's Sound! and Unalaschka! — 

 Stem stout, 2 inches to a foot high. Heads (1-4,) an inch or more in dia- 

 meter. 



% Obscure species. 



37. S. Canadensis (Linn.) : heads radiate ; leaves bipinnate, linear. Linn, 

 spec. 2. p. 869. 



Canada, Kalm. — Stem erect, smooth. Leaves bipinnate, linear, glabrous ; 

 the uppermost simply pinnate. Corymb terminal, compound, fastigiate, yel- 

 low. Involucre rufescent. Linn. 



38. 5?. Kahnii (Nutt.) : heads paniculate ; leaves pinnatifid, somewhat 

 villous ; the segments sinuate ; stem herbaceous. Linn. spec. ed. 2. p. 1244, 

 under the name of Cineraria Canadensis. 



Canada, Kalm. — Like Cineraria maritima, but the leaves instead of to- 

 mentose are subvillous, especially beneath. Rays spreading, not revolute. 

 Stem annual, not perennial. Involucre a little sphacelate at the apex. 

 Linn. — We are inclined to suspect some mistake respecting the habitat of 

 several Linnsean species said to have been collected in Canada by Kalm. 



39. S. Cymbalaria (Pursh) : radical leaves petioled, subrotund, trun- 

 cate at the base, with the petioles appendiculate and somewhat lyrate; the 

 cauline sessile, linear, incisely toothed ; stem somewhat one-flowered. Pursh, 

 fl. 2. p. 530. 



North West Coast of America, Nelson, in herb. Banks. — May it not be 

 the same with S. residifolius ? 



40. S. pauperculus (Michx.) : dwarf; stem very simple, rigidly erect, 

 somewhat naked ; leaves all lanceolate, a few of the radical somewhat en- 

 tire ; the others sparingly incisely toothed or serrate [or subpinnatifid] ; co- 

 rymb of few [2-4] heads; involucre nearly glabrous; rays rather small. 

 Michx. fl. 2. p. 120. 



Canada near the Lakes, Michaux. Newfoundland, Pylaie. {V.sp.in 

 herb. Michx. S^herb. Pylaie.) — Plant 5-7 inches high. — Perhaps not differ- 

 ent from the remarkable and ambiguous S. aureus var. lanceolatus. 



S. ciliatus, Walt., is most probably Erigeron Canadense. 

 S. opuntiisfdius, Raf. fl. Ludov. 



CiTieraria Caroliniensis (Walt. Car. p. 207): heads paniculate; leaves petioled,* 

 oblong, denticulate, smooth ; stem herbaceous. 



