328 LXXV. COMPOSITE. Solidago. 



17. BOLTONIA. 



In honor of J. B. Bolton, author of" Ferns of Great Britain," «fec., 1788. 



Heads many-flowered ; ray flowers 9 ' in a single series, those of 

 the disk tubular. ^ ; scales in 2 series, appressed, with membranous 

 margins ; receptacle conic, punctate : achenia flat, 2 or 3-winged : 

 pappus of minute setse, 2 ( — 4) of them usually lengthened into awns. 

 — % Glabrous, branching herbs. Lvs. lanceolate^ entire, sessih. Hds. 

 loosely corymbose. Rays purplish-ichite. 



1. B. GLASTiFOLiA. L'Hcr. 



lyvs. lanceolate and oblanceolate, acute, tapering to the narrow base, lower 

 ones sometimes serrate ; hds. on short peduncles, in a somewhat contracted 

 corymb; branches leafy; ach. obcordate, conspicuously winged, pubescent, with 

 2 awns nearly its own length. — Prairies and banks of streams, 111. Jcnney! 

 Penn. to N. Car. This plant resembles an Erigeron, but is very smooth, 3— 6f 

 high. Stem leaves 2 — 4' by \—i' ; branch leaves of the same form but smaller. 

 Rays about 30, expanding 9". Jl. Aug. 



2. B. ASTERoiDEs. L'Hcr. (B. diffusa. Ell 7 Chrysanthemum Caroli- 

 nianum. Walt.) — Lvs. linear-lanceolate, obtuse or acute, all entire, nar- 

 rowed to the base, those of the branches subulate, minute ; hds. on long pedun- 

 cles, in a diffuse and loosely paniculate corymb; branches and branchlets very 

 slender and nearly naked; ach. oxa.\.e or somewhat obcordate, smooth, 2-awned. — 

 Prairies, &c. la.f 111. to Ga. and La. A very smooth plant, between an Aster 

 and an Erigeron, with a diffusely branched summit, 3 — 7f high. Leaves 2—5' 

 or 6' by i — h', reduced upwards" to setaceous bracts 1 — 2" in length. Heads 

 terminating the filiform branchlets. Rays expanding 1". Aug. Sept. 



gectioii 3. Heads radiate. Rays yellow. 

 18. SOLIDAGO. 



Lat. solidari, to unite ; from the vulnerary qualities of the plants. 



Flowers of the ray about 5, 9' remote, of the disk 5; involucre ob- 

 long, imbricate, with appressed scales ; receptacle punctate, narrow ; 

 pappus simple, capillary, scabrous. — % Herbs, very abundant in the 

 U.S. Stem erect, bra aching vear the top. Lvs. alternate. Hds. smallj 

 y^ith 1 — 15 (very rarely 0) small rays. Fls. yelloio [one species whitish)^ 

 expanding in the autumnal months. 

 § 1. Stems much branched, corymbose. Leaves all linear, entire, sessile. 



1. S. LAN-CEOL.VrA. Ait. Grass-leaved Goldenrod. 



St. angular, hairy, much branched ; lvs. linear-lanceolate, entire, 3-veined, 

 rough-margined, slightly hi.spid on the veins beneath ; corymbs terminal, fasti- 

 giate. — In woods and meadows, Can. and U. S. Distinguished from most other 

 species by its flat-topped corymb. Stem 2 — 4f high, with numerous, very long 

 and narrow leaves, which are distinctly 3-veined and acutely pointed, smaller 

 ones often fascicled in the axils. Flowers in terminal, crowded clusters. In- 

 volucre ovate. The whole plant is fragrant. Sept. 



2. S. TENUIFOLIA. Ph. 



St. angular, smooth, with many fastigiate branches ; lvs. linear, spread- 

 ing, ob.scurely 3-yeined, scabrous on the margin, the axils leafy; corinnb ter- 

 minal, consisting of clustered heads ; rays about 10, .scarcely as long as the disk. 

 — Meadows near the sea-coast, Mass. ! to La. Also Wis. Dr. Lapham! Avery 

 slender species, distinguished from S. lanceolata by the extreme narrowness of 

 the leaves and the thinner, more open corymb, which is often reduced to a few 

 heads. The leaves bear tufts of smaller "ones in their axils, and are punctate 

 with resinous dots. Aug. — Oct. 

 § 2. Stem simple, corymbose above. Lower leaves lanceolate, petiolate. 



3. S. RiGiDA. Hard-kavcd Goldenrod. 



Sf. stout, rough anil hairy ; Irs. ovate-oblong, rough with minute hairs, 



