278 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



8. Solidago suaveolens Schoepf. Sweet-scented goldenrod. 

 Sandy woods of the Coastal Plain. July-Sept. Eastern N. Amer. (S. odora Ait.) 



9. Solidago rugosa Mill. 



Dry or moist ground; common. Sept.-Oct. Eastern N. Amer. (S. altissima of 

 Ward's Flora.) 



S. rugosa aspera (Ait.) Fernald {S. aspera Ait.) is a form with thick rugose leaves, 

 these often rounded at the base (rather than narrowed, as in the species). 



10. Solidago ulmifolia Muhl. 



Woods; chiefly in the Piedmont Region. Aug.-Sept. Eastern N. Amer. 



11. Solidago elliottii Torr. & Gray. 



Sphagnum bogs of the Coastal Plain. Aug.-Oct. Eastern U. S., near the coast. 



12. Solidago neglecta Torr. & Gray. Swamp goldenrod. 

 Sphagnum bogs of the Coastal Plain. Sept.-Oct. Me. to Md. and westward. (S. 



stricta of Ward's Flora.) 



13. Solidago juncea Ait. Early goldenrod. 

 Chiefly in old fields; common. July-Sept. Eastern N. Amer. {S. arguta of 



Ward's Flora.) 



14. Solidago rupestris Raf. 



Along the upper Potomac. Aug.-Sept. Eastern U. S. 



15. Solidago canadensis L. 



Low ground along the upper Potomac. Aug.-Oct. Eastern N. Amer. 



16. Solidago serotina Ait. 



Low ground, among rank weeds; frequent. Aug.-Oct. Widely distributed in N. 

 Amer. {S. gigantea of Ward's Flora.) 



16a. Solidago serotina gigantea (Ait.) A. Gray. 

 With the typical form; common. July-Aug. Eastern U. S. 



17. Solidago altissima Ait. Tall goldenrod. 



Roadsides and borders of fields; common. Aug.-Oct. Eastern U. S. {S. cana- 

 densis of Ward's Flora.) 



18. Solidago nemoralis Ait. 



Dry fields; common. Sept.-Oct. Eastern N. Amer. 



19. Solidago rigida L. 



Dry fields; Woodley Park and Cabin John; rare. Sept. Eastern IT. S., west to 

 Colo. {Oligoneuron rigidmn Small.) 



10. ETJTHAMIA Nutt. 



1. Euthamia graminifolia (L.) Nutt. 



Woods and open fields; common. Sept.-Oct. Eastern N. Amer. {Solidago grami- 

 nifolia Salisb.; 5. lanceolata of Ward's Flora.) 



11. SERICOCARPIJS Nees. White-topped aster. 



Leaves entire, linear or linear-spatulate, glabrous or nearly so; involucres 4-7 mm. 



long; pappus white 1. S. linifolius. 



Leaves nearly all toothed, usually obovate, pubescent; involucres 5-9 mm. long; 



pappus rusty 2. S. asteroides. 



1. Sericocarpus linifolius (L.) B. S. P. 



Thin woods and open fields; chiefly north and east of Washington. June-Oct. 

 Eastern U. S. {S. solidagineus Nees.) 



2. Sericocarpus asteroides (L.) B. S. P. 



Dry woods and open fields; common. June-Sept. Eastern U. S. {S. conyzoides 

 Nees.) 



