Oedee 'JO.— COMPOSITjE. 466 



toothed or inciaed, upper subolasping ; scales very hairy, longer than the disk ; 

 disk corollas with subulate teeth ; receptacle fimbriUate, with slender awns. — (D 

 La., Tex, and in gardens. St. branching. Hds. 1 to IJ' diam. Rays 10 to 12, 

 violet-purple, with yellow teeth. 



63. POLYP'TERIS, Nutt. (Gr. Tzo^vg, many, nrepov, a wing ; from 

 the feather-like pappus.) Heads discoid ; flowers all perfect, tubular 

 and similar; scales flat, scarious, in 2 or 3 series, appressed ; receptacle 

 naked; achenia 4-angled, slqnder at base; pappus of 6 to 12 mem- 

 branous, pinnately striate scales. — Lvs. scattered, lanceolate. Fls. 

 cyanic. (Palafoxia, T. & G.) 



P. integrifdlia Nutt. Rough ; st. cory mbous above ; lvs. linear-lanceolate, 

 entire ; outer scales loose, acut3, inner obtuse ; pappus of 8 to 10 acuminate 

 squamiB with fringed or plumed edges. — Barrens, 8. "W. Gau and Mid. Pla. 

 Sts. 3 to 5f high, bearing the large, purplish heads in a level-topped corymb, 

 Aug. — Oct. 



64. HYMENOPAP'PUS, L'Her. (Gr. v/xr/v, membrane, TraTTTOof, pap- 

 pus^ from tlie character.) Heads many-flowered ; flowers all perfect, 

 tubular; scales 6 to 12, in 2 series, oval, obtuse, membranaceous, 

 colored ; receptacle small, naked ; anthers exserted ; achenia broad at 

 the summit, attenuate to the base ; pappus of many short, obtuse, 

 membranous scales in one series. — ® or 4 North American, villous 

 herbs. St. grooved and angled. Lvs. alternate, pinnately divided. 



H. scabidsseus L'Her. Hoary- villas, or nearly glabrous ; lvs. pinnately or hi 

 pinnately parted, segments linear or oblong, entire or sparingly toothed ; hds. 

 in simple cory mbs ; scales obovate, 1 — 11, white, greenish at base, undulate on 

 the margin, longer than the disk ; cor. deeply lobed ; ach. pubescent. — 111. to 

 Fla. Stem 1 — 2f high, whitish with soft cotton when young, at length purplish 

 and glabrous. Segments 1 — 11' by 1 — 2", rather acute. Hds. whitish, about 

 21-flowored. Apr., May. (South.) — Aug. ' 



65. HELE^NIUM, L. American Sneezewort. (Named for the 



celebrated Helen, who is said to have availed herself of its cosmetic 



properties.) Involucre double, the outer of leafy, narrow scales, the 



inner chafiy ; ray pistillate ; pappus of several 5-awned, chaffy leaves ; 



receptacle globous, naked in the disk, and chafiy in the ray only ; ray 



flowers half 3-cleft ; seed villous. — Lvs. alternate, decurrent. Rays 



yellow. 

 t 



§ Disk globular, its florets witli ft 5-tootliod corolla. Nos. I — 3 



I Disk oblong, its florets with a4-tootlied corolla No. 4- 



1 H. autumnale L. Lvs. lanceolate, serrate, smooth or slightly pubescent, de- 

 current ; fls. loosely corymious. — y In damp places. St. 2 to 3f high, branching 

 strongly, winged by the decurrent lvs. Lvs. tapering to each end, or elliptic- 

 lanceolate, more or less deeply serrate. Fls. large, numerous, terminal, with 

 drooping rays, each ending in 3 obtuse teeth, and longer than the large, globouB 

 disk. The plant is very bitter. Aug. 



(3. CANALioniXTnM. Rays concave, canaliculate or 3-furrowed. (EI. canalicu- 

 latum Lam.) 



2 H. parvifldrum Nutt. I/vs. lanceolate, subentire, smooth, scarcely decurrent ; 

 hds. solitary, or in smaU, scattered clusters. — G-a. (Nuttall.) Heads about half as 

 large as in No. 1. Disk globous, longer than the filiform scales. Rays flat. 

 Pappus scales awned, half as long as the corolla. Ach. smooth. 



3 H. tenuifdlium Nutt. Smoothi.sh; branches numerous, fastigiate, very leafy; 

 lvs. linear or filiform, entire, fascicled; scales subulate; disk globous. — ^Fields, 

 waysides, Ga. (Feay, Pond) to La. St 1 to 2f high, naked and woody below, 



