ORDER LXVin. COMPOSITE. 391 



20. H. sparsifo'lius, (Ell.) Stem scabrous, with long slender branch- 

 es, nearly glabrous. Leaves opposite, ovate, coarsely toothed, hispid, 

 scabrous, the upper ones nearly sessile. Flowers in loose panicles ; in- 

 volucre with the leaves finely ciliate ; ray florets about 14; pappus 

 subulate. — Yellow. 2f . Aug. — Oct. Western Geo. 



21. H. ruBEs'cEXs, (L.) Stem erect, pubescent, hoary, nearly simple. 

 Leaves sessile, opposite, cordate-ovate, pubescent, with scabrous margins. 

 Floicers at the extremities of the branches ; involucre with villous, near- 

 ly subulate scales; ray florets lanceolate, 14 — 16. Seed compressed; 

 pappus 2 subulate scales, ciliate. — Yellow. 2f. Aug. — Sept. Middle 

 Georgia. 2 — 3 feet. 



22. H. texuifo'lius, (Ell.) Stem erect, glabrous. Leaves opposite, 

 on rather long petioles, ovate-lanceolate, somewhat tapering at the 

 base, coarsely serrate, slightly scabrous on the upper surface, and 

 slightly pubescent beneath. Flowers few, terminal ; involucre as long 

 as the disk, with ciliate leaves ; ray florets about 10; pappus subulate. 

 — Yellow. 2f . Aug. — Oct. Western Georgia. 



23. H. tracuelifo'lius, (L.) Stem scabrous, branching. Leaves ovate- 

 lanceolate, serrate, attenuate at the base, scabrous, tomentose beneath, 

 whitish above. Flowers in terminal panicles ; involucre with subulate 

 ciliate leaves; ray florets 10 — 12 ; pappus subulate ; chaff hairy at the 

 summit. — Yellow. If. Sept. — Oct. Mountains. 3 — 4 feet. 



24. H. decapet'alus, (L.) Stem pubescent, scabrous, branched. 

 Leaves ovate, somewhat spatulate, serrate, scabrous above, pubescent 

 beueath, upper ones alternate. Floviers in large panicles ; involucre 

 with long ciliate leaves; ray florets 10 — 12, long; pappus subulate, 

 pubescent. — Yellow. 2f. Aug. — Oct. Middle Geo. 3 — 4 feet. 



25. H. multiflo'rus, (L.) Stem scabrous. Leaves scabrous, the low- 

 er ones cordate, the upper ovate ; involucre many-leaved, smooth ; ray 

 florets numerous.— Yellow. If. July — Sept. Mountains. 2 — 3 feet. 



26. H. altis'simus, (L.) Stem glabrous, purple. Leaves alternate, 

 ovate-lanceolate, serrate, scabrous, tapering toward the summit, on 

 short fringed petioles ; ray florets about 16 ; involucre with ciliate 

 lanceolate leaves; chaff green. — Yellow. If. July — Sept. Mount- 

 ains. 6 — 8 feet. 



27. H. tubero'sus, (L.) Stem erect, scabrous, branching. Leaves 

 ovate and cordate ovate, alternate, scabrous, serrate, the lower ones 

 opposite; involucre with ciliate, linear-lanceolate scales; rays 12 — 15 ; 

 pappus 1 — 4 subulate scales or chaffy awns. Roots bearing tubers, 

 used as pickles. — From Brazil. Artichoke or Jerusalem Artichoke. 



Ge.vus LI.— HELIAXTHEL'LA. T. & G. 



(Diminutive of Helianthus.) 



Heads many-flowered ; ray florets neutral ; those of the disk 

 perfect ; scales of the involucre loose, somewhat foliaceous. 

 Ovary compressed, with the margins winged more or less, and 

 produced into a varying appendage. 



1. H. grandiflo'ra, (T. <fc G.) Stem pubescent, simple. Leaves lance- 

 linear, hispid ; ray florets about 20 ; chaff 3-toothed. Achenia ovaL, 

 compressed.— 3 — i feet. East Florida. 



