388 COMPOSITiE. Leptopoda. 



at the summit, bearing 2 or 3 heads. Primordial radical leaves often sessile, 1-2 

 inches long; the succeeding sometimes larger ; the upper cauline also small : 

 but in var. /5. all are larger. Heads 12-18 lines in diameter, including the 

 numerous (12-25) rays. Disk-flowers brown at the summit, or often pale. 



§ 2. Stem leafy, corymbose at. the summit ; the heads on short peduncles : rays 

 8-12, drooping {very rarely furnished with an abortive style or with sterile 

 filaments). — Pseudo-helenium. 



6. L. bracliypoda: minutely pubescent, or glabrous below^; stem fastigiate- 

 corymbose at the summit ; leaves decurrent, lanceolate or oblong-lanceolate, 

 entire or denticulate; the upper acute ; scales of the involucre linear-lanceo- 

 late, shorter than the globose brownish-purple disk, about half the length of 

 the golden yellow rays ; scales of the pajjpus ovate, somewhat denticulate, 

 mucronate or abruptly cuspidate-awned : acbenia hairy on the angles. — He- 

 lenium fpiadridentatum, Hook.! compan. tobot. mag. 1. p. 98 ; Croom ! cat. 

 pi. New Bern. p. 44 ,• not o'l Labill. S^'c. H. nudiflorum & H. micranthum, 

 Nutt. ! in trans. Amer. phil. see. I. c. p. 385. 



p. rays dark orange or brownish-purple. — H. purpureum. Hale ! mss. 



Damp soil. North Carolina! to Georgia! and Florida! and from Illinois! 

 to Louisiana ! Arkansas! and Texas ! apparently common. April-July. — 

 Plant 1-3 feet high, commonly slender and simple below, often itiuch 

 branched ; the radical leaves often tootl}ed. Disk 4-6 lines in diameter. 

 Receptacle ovoid. Rays irregularly and often deeply cleft, one-half to three- 

 fourths of an inch long. Corolla of the disk 4-5-toothed. Pappus sometimes 

 scarcely pointed, but mostly ti|)ped with a mucronate point or short awn. — 

 The variety with bro\Yn-purple rays is apparently confined to the South- 

 Western Slates, and is not constant. The rays are entirely sterile; but in 

 one or two instances we have observed an abortive style in a portion of the 

 rays, while the others were neutral. The aspect of this somewhat variable 

 plant is entirely that of Helenium : but as the sterile rays afford the only 

 available character of Leptopoda, we are obliged to retain it in the latter 

 genus. 



Div. 2. Baldwinie s.. — Receptacle very deeply alveolate ; the car- 

 tilaginous alveoli consisting of united chaff? enclosing the achenia. Rays 

 neutral. 



129. BALDWINIA. (Baldwina,) Nutt. gen. 2. p. 175 (partly) ; Ell. sTc. 



Heads (subglobose in fruit) many-flowered ; the ray-flowers 20-30, Hgu- 

 late, neutral, in a single series; those of the disk tubular, perfect. Involucre 

 cainpanulate, scarcely as long as the disk ; the scales imbricated in about 4 

 series, short and thick, appressed, or at length somewhat squarrose ; the inner- 

 most longest, mucronate-acuminate. Proper receptacle convex-conical, co- 

 vered with cartilaginous chaff" entirely concreted, and forming 5-6-angular 

 cells or deep alveoli, the margins nearly truncate and entire. Rays nar- 

 rowly cuneiform-oblong, 3-toothed at the apex. Corolla of the disk Avith a 

 short corneous tube, and a cylindrical 5-toothed limb ; the teeth glandular- 

 puberulent. Branches of the style flattish, crowned with a ring or tuft of col- 

 lecting hairs, and terminated by a subulate cone. Achenia immersed in the 

 cells, cylindrical-obconical, silky-villous. Pappus of 7-9 lanceolate-oblong 



