430 ORDER 70. COMPOSITE. 



ened into awns. It Glabrous, branching herbs. Lvs. lanceolate, en- 

 tire, sessile. Hds. loosely corymbous. Rays purplish-white. 



1 B. glastifolia L'Her. Lvs. linear-lanceolate, narrowed to the base, the lowest 

 serrate; lids, in a loose paniculate corymb; fr. obovate, with 2 awns, and several 

 minute setae between. Prairies, &c. West and South. Very slender, 3 7f. 

 high, strict. Lvs. 3 5' long. Rays pale, spreading 7 9". Jl. Aug. 



2 B. decurrens. Lvs. oblong, margins decurrent on the winged stout stem ; 

 hds. corymbous, globular in fruit ; ach. as in No. 1 j rays purple. Bottoms W. 



3 B. diffdsa Ell. Lvs. linear-lanceolate and linear-subulate, all entire ; hds. 

 small, hi a diffuse panicle with very numerous and slender branchlets: ach. 

 obovate, narrowly winged, with 2 awns less than half its length, and several very 

 minute seta3 between. G-a. to La., common. A very slender and diffusely 

 branched plant, 3 to 7f high. Eays spreading about 5". Aug. Oct. 



4 B. asteroides L'Her. Lvs. lanceolate, all entire; hds. in a somewhat con- 

 densed corymb, on long peduncles; branches leafy; ach. broadly oval, smooth, 

 with 4 to 5 minute seta?, none of them produced into awns. Margins of swamps, 

 Penn. to Ga. Plant 1 to 3f high. Kays 13 to 20, spreading 6 to 7". Aug., 

 Sept. 



25. BRACHYCH/E'TA, Torr. & Gr. FALSE SOLID AGO. (Gr. Ppaxw, 

 short, xaiTij, hair ; in reference to the pappus.) Heads few-flowered ; 

 rays 4 or 5, $ , ligulatc ; disk-flowers 4 or 5, $ , tubular ; involucre 

 cylindric, imbricate ; receptacle naked ; pappus a single row of scale- 

 like bristles shorter than the obconic achenium. 2 Habit that of a 

 Solidago. The golden yellow heads arranged in little clusters, forming- 

 one or several unilateral, recurved racemes. 



B. cordata Torr. & Gr., "Woods, E. Ky. (near Cumberland Gap) to Ga., along the 

 mts. St. 2 to 4f high, simple or with several branches above, pubescent. Lvs. 

 alternate, cordate, ovate, acute or acuminate, the lower petiolate, more or less cor- 

 date, serrate, the upper entire, sessile. Heads small (3" long), in 1 (or more) 

 long, recurved, nearly leafless, interrupted rac. Aug. Oct. 



26. SOLIDA V GO, L. GOLDENROD. (Lat. solidary to unite ; from the 

 vulnerary qualities of the plants.) Flowers of the ray about 5, $ , re- 

 mote ; of the disk g ; involucre oblong, imbricate, with apprcssed scales ; 

 receptacle punctate, narrow ; pappus simple, capillary, scabrous. 2 

 Herbs, very abundant in the IT. S. St. erect, branching near the top. 

 Lvs. alternate. Hds. small, with 1 to 15 (very rarely 0) small rays. 

 Fls. yellow (one species whitish), expanding in the autumnal months. 



a Shrub 1 to 3f high. Eays 1 to 3. Southern No. 1 



a Herbaceous; heads without rays, discoid Nos. 2, 3 



a Herbaceous ; heads radiate, rays, 1 to 15, usually small, (b) 



b Scales of the involucre with recurved, herbaceous tips Nos. 4, 5 



b Scales imbricated, erect, scarious, seldom herbaceous, (c) 



C Kays white or cream-colored. Clusters axillary and terminal No. G 



O Eays golden yellow, (d) 



d Inflorescence axillary (chiefly), in clusters or short racemes, (e) 



e Stems pubescent Nos. 7, 8, y 



e Stems glabrous Nos. 8, 9 



d Inflorescence terminal, virgate or paniculate, (f ) 



f Clusters or rac. erect, not secund. Lvs. feather-veined, (g) 



g Heads large, with loose scales. Alpine plants Nos. 10 12 



g Heads not large. Plants glabrous. Eays 4 to 7 Nos. 18 15 



g Heads not large. Plants soft-downy. Kays 9 to 12 Nos. 16, 17 



f Clusters or racemes recurved and secund (one-sided), (h) 



h. Leaves 3 (or 1)- veined. Very smooth, salt-marsh herbs Nos. 18, 19 



ll Leaves evidently 3-veined. Herbs inland, &c. (k) 



k Leaves entire or very nearly so Nos. 20, 21 



k Leaves serrate. Stem smooth and glabrous Nos. 22-24 



k Leaves serrate. Stem roughish-pubescent Nos. 25,26 



h Leaves not veiny, thick, subentire. Herbs inland Nos. 27 29 



b. Leaves evidently feather-reined, mostly serrate, (m) 



m Stem hairy or downy. Leaves rough or not Nos. 80 82 



m Stem glabrous. Leaves glabrous or not. Eays 2 to 5 Nos. 33 86 

 m Stem glabrous. Lvs. glabrous or not. Eays G to 12. (EL> 



