450 ORDER 70. COMPOSITE. 



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. Sraoothish, much branched ; Ivs. 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-toothed or lobed. Disk fls. 4- 

 toothed. Jn. Aug. 



66. LEPTOP'ODA, Nutt. (Gr. kerr-og, slender, TTOV?, foot ; alluding 

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

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

 taclo conical; chaff 0; pappus of 6 10-fringed squamae. 2 North 

 American herbs, with the habit of Helenium. 



Heads corymbed, on short peduncles. Pappus cuspidate-a\vned No. 1 



Head solitary, on a long peduncle. Pappus awnless. Achenia glabrous Nos. 2, 3 



Acheniu hairy Nos. 4, 5 



1 L. brach^-poda Torr. & Gr. St. leafy, corymbous at summit ; Ivs. decurrent, 

 lanceolate, subentire, the lower toothed, obtuse ; 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. Rays broadest at summit, rather deeply and irregularly toothed, 

 7 9" by 4 5". (Helenium quadridentatum Hook.) 



2 L. Helenium Nutt. Smooth ; Ivs. 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 one hd. Lvs. 3 to 6' long. Disk 5 to 8'' broad. Mar., Apr. 



3 L. incisa Torr. & Gr. Glabrous ; Ivs. lanceolate, sessile, not decurrent, sinuate- 

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

 ach. glabrous. G-a. (Le Conte). 



4 L. pubenila Macbr. St. clustered, tomentous or downy; Ivs. 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 ; Ivs. all entire or nearly so, the caulins 

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

 hairy. N. Car. to Ala. St. 1 to 3f high, occasionally branched, and with more 

 than 1 head. Hd. 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-villous, crowned with a pappus of 

 9 to 12 oblong scales. 1C Herbs simple or corymbed, naked above, 

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



1 B. unifldra Nutt. Puberuknt, simple, \-flowered; 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 7 to 8" wide, rays narrow, spreading nearly 2'. Cells of the receptacle just 

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



2 B. multifldra Nutt. Glabrous, much branched, with a corymb of fls. ; Ivs. very 

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

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



