COMPOSITE. 193 



33. (Si. axillaris Pursh : stem smooth, terete, very erect ; leaves lan- 

 ceolate, serrate, smooth ; racemes axillary, subglobose, erect ; rays 

 elongated. 



HAB. Woods. Can. to Virg. Aug. Oct. U.Stem 23 feet 

 high. Leaves narrow-lanceolate. This species, which is quite 

 common, is distinguished from the former by its narrower leaves 

 and by its compact, somewhat globular racemes, clustered along 

 the stem. 



34. & vigaurca Linn. : stem erect, terete, pubescent and branching 

 at the top ; cauline leaves lanceolate, serrate, attenuate at each end ; 

 lower ones elliptic, somewhat hairy ; racemes erect ; rays elongated. 



b. alpina Big. : a few inches in height, with obovate or lanceolate, 

 mostly entire, leaves. 



HAB. Woods on the sides of the White Mountains. Big. N. to 

 Labrador. Aug.-Oct. If. Stem flexuous, 1 3 feet high. Leaves 

 elliptic or lanc'eolate, often with a long narrow base, serrate ; 

 the upper ones nearly entire. Floicers in a large panicle, yel- 

 low ; rays 5 10. Distinguished from all other species by its 

 much larger flowers. Common to Europe, Asia and America. 

 Var. b. is found, according to Dr. Bigelow, on the alpine sum- 

 mits of the White Mountains. 



35. S. rigida Linn. : stem hairy and scabrous ; leaves ovate-oblong, 

 rough with minute hairs ; those of the stem very entire, lower ones 

 serrate ; flowering branches paniculate ; racemes compact ; scales of 

 the involucre obtuse ; rays elongated. 



HAB. Mountains. N. J. to Car. Aug. Oct. 2j..Stem3 4 

 feet high, very pubescent when young. Flowers large, some- 

 what clustered near the summits of the branches, forming a 

 somewhat fastigiate corymb. 



36. & noveboracensis Linn. : radical leaves ovate-oblong, petiolate ; 

 stem nearly naked, with fastigiate branches. 



HAB. Sandy fields. N. Y. MuU. Sept. Oct. If. Stem 3 feet 

 high. Leaves rough. Flowers large. 



37. & squarrosa MuhL : stem thick, pubescent above ; leaves smooth, 

 lower ones very broad, spathulate oval, serrate, acute, margin scabrous; 

 the upper sessile, lanceolate-elliptic,, entire ; racemes glomerate, rigid 

 and pubescent ; involucre squarrose, many- flowered ; rays elongated, 

 10 or 12. 



HAB. Rocky hills. Ver. to Geor. Sept. If. Stem 2 3 feet 

 high, always simple. Racemes axillary, thick and crowded, 

 forming a compound spike. Well distinguished by its squarrose 

 involucre. 



38. S. puberula Nutt. : stem simple and terete, somewhat pubescent ; 

 leaves lanceolate, entire, on each side minutely pubescent, attenuated 

 at each end ; radical ones subserrate ; racemes spiked, axillary, erect 

 and condensed ; peduncles pubescent ; scales of the involucre linear- 

 lanceolate, acute ; rays elongated, about 10. 



17 



