466 Okdee 10.— COMPOSITjB. 



branches upright. Lvs. 1 to 2' long. Hds. 4 or 5" diam. 'Rays about 12, 

 spreading 9 or 10". Apr. — Nov. 

 4 H. quadridentatum Labill. Smoothish, much branched ; lvs. oblong, spar- 

 ingly lobed or toothed, the highest lanceolate, entire ; disk oblong, longer than 

 the rays ; pappus scales obtuse. — Swamps, Miss., La. to Ark. St. 1 to 3f high, 

 with solitary, terminal, small hds. Lvs. about ■i-toothed or lobed. Disk fls. 4- 

 toothed. Jn. — Aug. 



66. LEPTOP'ODA, Nutt. (Gr. AsTrTdc, slender, -novg, foot ; alluding 

 to the elongated peduncles.) Heads many-flowered ; rays neutral, cune- 

 ate, 3 — 4-oleft ; disk t^ ; scales spreading, numerous, attenuate ; recep- 

 tacle . conical ; chaff 0; pappus of 6 — 10-fringed squamse. — 71 North 

 American herbs, with the habit of Helenium. 



§ Heads corymbed, on sliort peduncles. Pappus cuspidate-awned No. 1 



§ Head solitary, on a long peduncle. Pappus awnless. — -Ichenia glabi'ous Nos. 2, 3 



— Achenia hairy Nos. 4, 5 



X L. braoh;^poda Torr. & Gr. St. leafy, corymbous at summit ; lvs. decurrent, 

 lanceolate, subentire, the lower toothed, obtu.3e ; hds. on short peduncles ; scales 

 lance-linear, about half as long as the 8 — 12 drooping rays ; disk brownish-purple. 

 — Separated from Helenium only on account of its sterile rays. In damp soil, 

 from Southern 111. to Tex. and S. States. Stem about 2f high. Heads several or 

 numerous. Bays broadest at summit, rather deeply and irregularly toothed, 

 1 — 9" by 4 — 5" (Helenium quadridentatum Hook.) 



2 Ij. Helenium Nutt. Smooth ; lvs. lanceolate or lance-linear, entire or re- 

 motely denticulate, mostly slightly decurrent, the lowest tapering to a petiole ; 

 pappus awnless, lacerated; aoh. glabrous; rays 20 or more in one row. — Moist 

 soils, S. Car. to Fla. and La. About 2f high, leafy below, ending in a long, naked 

 staUc, bearing one hd. Lvs. 3 to 6' long. Disk 5 to 8'' broad. Mar., Apr. 



3 L. inoisa Torr. & Gr. Glabrous ; lvs. lanceolate, sessile, not decurrent, siuuate- 

 pinnatifld or incised; pappus awnless, lacerated; rays about 40, in 2 or 'i rows; 

 ach. glabrous. — Ga. (Le Conte). 



4 L. pub§rula Macbr. St. clustered, tomentous or downy ; lvs. lance-linear, oc- 

 casionally toothed or incised, noi decurrent; ach. hairy; pappus scales obtuse.— 

 N. Car. to Fla. Sts. 1 to 2f high, usually many from one root. Lvs. 2 to 4' long, 

 half-clasping. Eays 20 to 30, broadly wedge-shaped, spreading 1^^ to 2'. Apr., 

 May. (H. pinnatiflda Nutt.) 



5 L. brevif olia Nutt. Nearly glabrous ; lvs. all entire or nearly so, the cauline 

 decurrent, the lower oblong-spatulate, obtuse, highest lanceolate, acute; ach. 

 hairy. — N. Car. to Ala. St. 1 to 2f high, occasionally branched, and with more 

 than 1 head. Hd. about as large as in No. 4. May, Jn. 



67. BALDWIN 'lA, Nutt. (To Dr. William Baldwin, one of oiir 

 pioneer botanists.) Involucre scales imbricated in 2 to 4 rows, appres- 

 sed, shorter than the disk, inner acute or acuminate; receptacle con- 

 vex, deeply alveolate with horny walls ; rays 8 to 20, neutral, in one 

 row, narrow-cuneiform, 3-toothed ; disk flowers ^ , tube horny below ; 

 achenia immersed in the cells, silky-villous, crowned with a pappus of 

 9 to 12 oblong scales. — Z[ Herbs simple or corymbed, naked above, 

 with alternate, linear, punctate lvs. and yellow fls. 



1 B. unifl6ra Nutt. Fulendent, simple, 1-Jiowered; hd. about 20-rayed ; pappus 

 9-leaved. — Open swamps, Va. to Fla. and La., near the coast. Plant 1 to 2f high, 

 striate-angled. Lvs. thick, linear-spatulate below, linear and bract-like above. 

 Disk 1 to 8" wide, rays narrow, spreading nearly 2'. Cells of the receptacle just 

 like a honey-comb, 2 to 3" deep. Jl — Sept. 



Z B. multifldra Nutt. Glabrous, much branched, with a corymh of fis. ; Iva. very 

 numerous, narrowly linear ; rays about 10 ; pappus 12-leaved; ach. marked with 

 12 rays on its flat sunamit. — Sand hills, Ga,, Fla. Plant 1 to 3f high, slender. 



