172 COMPOSITE. 



6. S. BICOLOR, L. White-rayed Golden-rod. 



Hairy; stem simple ; leaves oblong or elliptical-lanceolate, acute at each end ; lower 

 ones serrate, short-stalked; racemes short, dense, leafy, erect; scales of the involucre 

 obtuse. 



Woods and dry hills ; common. Aug. — Oct. Stem 1 to 2 feet high, erect Lower 

 lanes tapering into a petiole. Clusters or short racemes from the axils of the 

 upper leaves, forming an interrupted spike or crowded panicle. Hays about 8, 

 small, cream-color or nearly white". Yar. concolor, Torr. in Gray. Flowers all yel- 

 low. 



*** * Heads in erect, terminal, simple or compound racemes. 



7. S. puberula, Nutt. Puberulent Golden-rod. 



Minutely puberulent ; stem-leaves lanceolate, acute, tapering to the base ; lower 

 hemes wedge-lanceolate, subserrate; heads very numerous, crowded in compact 

 erect-spreading short racemes ; scales of tlce involucre linear-awl-shaped, appressed; 

 rays about 10, elongated. 



Low woods in sandy so il. Aug. — Oct. Stem straight, purplish, 1 to 3 feet high. 

 Leaves very minutely pubescent, 2 to 3 inches long ; the lower ones on dense winged 

 stalks. Heads rather large, bright yellow, in a prolonged and dense narrow or 

 pyramidal panicle. 



8. S. stricta, Ait. Upright Golden-rod. 



Smooth throughout; Stem simple, strict; leaves lanceolate, pointed, the lower ones 

 tapering gradually into winged petioles, somewhat sheathing at the base, minutely 

 serrate above the appressed teeth; racemes much crowded and appressed in a dense 

 wand-like panicle ; scales of the involucre linear-oblong, obtuse ; rays 5 to 6, small. 



Wet woods. July, Aug. Stem 2 to 3 feet high, very smooth. Root leaves 6 to 10 

 inches long, % to 1 inch wide. Panicle terminal, close, compound, of short, dense, 

 appressed racemes. Heads 12 to 18 flowered. 



9. S. speciosa, Nutt. Showy Golden-rod. 



Stem smooth, simple ; leaves oval or ovate, slightly serrate, the uppermost obloc^- 

 lanceolate, the lower ones contracted into a margined petiole ; heads somewhat 

 crowded in numerous erect racemes; ■peduncles and petioles rough-hairy; involucre 

 cylindrical with oblong, obtuse scales. 



Woods ; rather common. Aug. — Oct. A very handsome species, sometimes 6 fee^ 

 high. Leaves thickish, 4 to 6 inches long and 2 to 4 wide in the larger forms. Heads 

 very numerous with conspicuous, rays of a rich yellow, in a large showy pyramidal 

 panicle. Rays about 5, large. 



* * * * * Heads in one-sided racemes; leaves triple-veined. 



10. S. NEMORAUS, L. Grey Golden-rod. Field Aster. 



Minutely greyish, hoary, pubescent ; stem simple or corymbed at the summit 

 leaves oblanceolate or spatulate-oblong, the lower somewhat crenate-dentate and 

 tapering into a petiole ; heads in numerous paniculate-secund racemes ; scales of the 

 involucre linear oblong, appressed; rays 6 to 9. 



Dry, sterile fields; very common. Sept. A common starved looking species. 1 to 

 2 feet high, with a greyish, dusty aspect. Heads small but with conspicuous yellow 

 rays. Racemes numerous, dense, at length recurved, forming a crowded compound 

 panicle, which is usually turned to one side. 



11. S. Canadensis, L. Canadian Golden-rod, 



Stem tall and stout, rough, hairy; leaves lanceolate, pointed, sharply serrate, more 

 or less pubescent beneath ; heads small; racemes paniculate, one-sided, recurved ; 

 rays very short. 



Borders of thickets and fields; very common. Aug., Sept. Stem 2 to 5 feet high, 

 furrowed. Leaves sessile, 3 inches long, sometimes nearly entire, rough on the up- 



