compositjE. 117 



2. A. lanceola'tUS, Torr. and Gr. Stem simple, witli a 

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

 Rays 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 

 depressecLtufted, 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. 



as. SOMDA'GO, L. GOLDEN-ROD. 



* Heads clustered in the axUs of tliefeatlier-veined leaves. 



1. S. SquarPO'Sa, Muhl. 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. — Eocky woods. 



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

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

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

 in the upper axils, the whole forming an interrupted spike 

 or compound raceme. Sap-florets whitish. The variety 

 eon'eolor has yellow rays. — Dry banks and 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. Rays 3 or 4. — Cool woods. 



4. S. CSB'Sia, L., var. axiUa'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. 



* * Macemesterminal^'erect.lDosely thyreoid, not am^sided. 

 Leavesjfeatherrveined. 



5. S. liu'inllis, Pursh. {S. virgaurea, L., var. humilis. 

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



