456 Obdeb 70.— -COMPOSIT^Er 



brauches upright. Lvs. 1 to 2' long. lids. 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 4-toolhed or lobed. Disk fls. 4- 

 toothed. Jn. — Aug. 



66. LEPTOP'QDA, Nutt. (Gr. Xe-rog, slender, r:ovg y foot ; alluding 

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

 ate, 3 — 4-cleft; disk £ ; scales spreading, numerous, attenuate; recep- 

 tacle conical; chaff 0; pappus of G — 10-fringed squamae. — 2£ North 

 American herbs, with the habit of llelcnium. 



§ Heads corymbed, on short peduncles. Pappus euspidate-awned No. 1 



§ Head solitary, on a long podunclD. Pappus awnless. — Achenia glabrous Nos. 2, 3 



— Achenia hairy Nos. 4, 5 



1 Xi. brach^poda Torr. & Gr. St. leafy, corymbous at summit; lvs. decurrent, 

 lanceolate, subentire, the lower toothed, obtuse; hds. on short peduncles; scales 

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

 — Separated from Helenium only ou account of its sterilo rays. In damp soil, 

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

 numerous. Kays broadest at summit, rather deeply aud irregularly toothed, 

 T — 9'' by 4 — 5". (Helenium quadridentatum Hook.) 



2 L. 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; ach. 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 

 stalk, bearing ono hd. Lvs. 3 to 6' long. Disk 5 to S'' broad. Mar., Apr. 



3 L. incisa Torr. & Gr. Glabrous ; lvs. lanceolate, sessile, not decurrent, sinuato- 

 pinnatifid or incised; pappus awnless, lacerated; rays about 40, in 2 or 3 rows; 

 ach. glabrous. — Ga. (Lo Conte). 



4 L. puberula Macbr. St. clustered, lomentous cr downy; lvs. lance-linear, oc- 

 casionally toothed or incised, not 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. Rays 20 to 30, broadly wedge-shaped, spreading 1£ to 2'. Apr., 

 May. (H. pinnatifida Nutt.) 



5 L. brevifolia 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 Sf high, occasionally branched, and with more 

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



67. BALDWIN 'I A, Nutt. (To Dr. William Baldwin, one of our 

 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-villons, crowned with a pappus of 



to 12 oblong scales. — 2£ Herbs simple or corymbed, naked above, 

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



1 B. unifldra Nutt. Puberulent, simple, l-flovjered; 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, lincar-spatulato below, linear and bract-like above. 

 Disk 7 to 8" wide, rays narrow, spreading nearly 2'. Cells of tho receptacle just 

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



2 B. multiflora Nutt. Glabrous, much branched, with a corymb of fls. ; lvs. very 

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

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



