328 LXXV. COMPOSITE. Solidago. 



17. BOLTONIA. 



In honor of J. B. Bolton, author of" Ferns of Great Britain," &c., 1788. 



Heads many-flowered ; ray flowers $ , 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 setae, 2 ( — 4) of them usually lengthened into awns. 

 — % Glabrous, branching herbs. Lvs. lanceolate, entire, sessile. Hds. 

 loosely corymbose. Rays purplish-white, 



1. B. GLASTiFOLiA. L'Her. 



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

 ones sometimes serrate; Juh. 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. Jenney! 

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

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

 Raj-s about 30, expanding 9". Jl. Aug. 



2. B. ASTERolDEs. 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 diffu.se and loosely paniculate corymb; branches and branchlets very 

 slender and nearly naked; e^A. ovate or somewhat obcordate, smooth, 2-awned. — 

 Prairies, &c. la.! 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', reduced upwards to setaceous bracts 1 — 2" in length. Heads 

 terminating the filiform branchlets. Rays expanding 7". Aug. Sept. 



Section S> Heads radiate. Rays yello'w. 



18. SOLIDAGO. 



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



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

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

 pappus simple, capillary, scabrous. — % Herbs, very abu7idant in the 

 U. S. Stem erect, branching near the top. Lvs. alternate. Hds. small, 

 tcith I — 15 [very rarely 0) small rays. Fls. yellow [one species ^vhitish), 

 expanding in the autumnal months. 

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



1. S. LANCEOLATA. Ait. Grass-leaved Goldenrod. 



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

 rough-margined, slightly hispid on the veins beneath ; carj/mbs 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. TENUIFOLTA. Ph. 



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

 ing, obscurely 3- veined, scabrous on the margin, the axils leafy ; corymb 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 ! A very 

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

 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-leaved Goldenrod. 



SI. stout, rough and hairy ; lvs. ovate-oblong, rough with minute hairs. 



