COMPOSITE. 117 



2. A. laneeola'tus, Torr. and Gr. Stem simple, with a 

 tuft of coriaceous radical leaves, and bearing 3 to 15 heads. 

 Eays 20 to 50. Scales of the involucre in 3 or 4 unequal 

 series, lanceolate, with greenish tips and whitish base. 

 Marshy plains, N.W. 



3. A. aeau'liS, Gray, var. glabra'tUS, Eaton. Stems 

 depressed-tufted, from a woody rootstock, glabrous or nearly 

 so. Leaves rigid, persistent, crowded below, a few only on 

 the scape-like flowering stems, which occasionally branch 

 above and bear 2 or 3 heads. Dry gravelly ridges, N.W. 



33. SOL,IDA'GO, L. GOLDEN-ROD. 



* Heads clustered in the axils of the feather-veined leaves. 



1. S. Squarro'sa, Mulil. Stem stout, 2-5 feet high, 

 simple, hairy above. Scales of the involucre with reflexed 

 herbaceous tips. Leaves large, oblong, serrate, veiny ; the 

 lower tapering into a long winged petiole, the upper sessile 

 and entire. Heads in racemose clusters, the whole forming a 

 dense, leafy, interrupted, compound spike. Rocky woods. 



2. S. bi' color, L. Stem hoary-pubescent, usually simple. 

 Leaves oval-lanceolate, acute at both ends ; the lower oval 

 and tapering into a petiole, serrate. Heads in short racemes 

 in the upper axils, the whole forming an interrupted spike 

 or compound raceme. Hay-florets whitish. The variety 

 COn'eolOP has yellow rays. Dry banks aud thickets. 



3. S. latifo'lia, L. Stem smooth, angled, zigzag, 1-3 feet 

 high. Leaves broadly ovate or oval, strongly and sharply 

 serrate, pointed at both ends. Heads in very short axillary 

 clusters. Bays 3 or 4. Cool woods. 



4. S. ese'sia, L., var. axilla'ris, Gray. Stem smooth, 

 terete, glaucous, slender, usually branching above. Leaves 

 smooth, lanceolate, pointed, serrate, sessile. Heads in very 

 short clusters in the axils of the leaves. Rich woods and 

 hillsides. 



* * Racemes terminal, erect, loosely thyrsoid, not one-sided. 



Leaves feat.lier-veined. 



5. S. hu'miliS, Pursh. (S. virgaurea, L., var. humilis, 

 Gray.) Stem low, 6-12 inches high, usually smooth j the 



