Part 1, 1914] CARDUACEAB : HELENIEAE 57 



Hymenopappus pedatus Cav.; Lag. Gen. & Sp. Nov. 28. 1816. 



Achyropappus pedatus Less. Syn. Comp. 239. 1832. 



Schkuhria glomerata Rob. & Seaton, Proc. Am. Acad. 28: 109. 1893. 



An erect annual; stem 3-5 dm. high, simple below, striate, glandular-hispid and hirsute; 

 lower leaves opposite, petioled, 4-7 cm. long, pedately divided into 3-5 linear to oblong divi- 

 sions, hirsutulous; upper leaves alternate, 3-divided or those of the branches simple; heads 

 corymbose-paniculate; involucre turbinate-campanulate, 4 mm. high, 5 mm. broad; bracts 

 about 8, obovate, usually purplish; flowers 10-15; corollas white, 3 mm. long; tube about 1 

 mm. long; lobes oblong; achenes elongate-obpyramidal, 4-angled, hirsute, 3 mm. long; 

 squamellae 8, orbicular or obovate, 1 mm. long, callous at the base. 



Type locality: Mexico. 



Distribution: Central and southern Mexico. 



Illustrations: Cav. Ic. 4: pi. 356; Cass. Opusc. 1: pi. 7; Diet. Sci. Nat. 64: pi. 86 (Atlas 

 3: pi. <?); E. & P. Nat. Pfl. 4&: f. 124, K; Bot. Mag. pi. 2040. 



2. Florestina purpurea (Brand.) Rydberg. 



Hymenothrix purpurea Brand. Univ. Calif. Publ. Bot. 3: 392. 1909. 



A strict annual; stem 3-5 dm. high, angled, striate, hirsutulous and more or less glandular- 

 hispid, especially above; leaves 3-5 cm. long, alternate, twice ternately dissected into linear 

 segments, hirsutulous and sparingly glandular; heads corymbose; involucre about 5 mm. 

 high, 8-10 mm. broad; bracts 8-10, oblanceolate, obtuse, dark-purple on the margin; flowers 

 about 25 ; corollas white, tinged with purple; tube slender; lobes oblong, longer than the funnel- 

 form throat ; achenes 4 mm. long, narrowly obpyramidal, 4-angled, glabrous, except the densely 

 hirsutulous base; squamellae 8, ovate-lanceolate, the strong midrib excurrent into a short 

 awn-point. 



Type locality: Near San Louis [Tultitlanapa], Puebla. 

 Distribution: Puebla. 



3. Florestina tripteris DC. Prodr. 5: 655. 1836. 



Lepidopappus tripteris Moc. & Sesse; DC. Prodr. 5: 655, as synonym. 1836. 



An erect annual; stem 3-6 dm. high, canescent, striate; leaves petioled, all except the 

 lowest alternate; petioles 1-3 cm. long; blades of the lowest leaves entire, ovate, 1-3 cm. long, 

 canescent on both sides, triple-ribbed, the middle ones ternate with oblong to linear-lanceolate 

 entire or rarely lobed divisions, the uppermost with linear divisions or entire; heads corym- 

 bose-paniculate; involucre campanulate, 4 mm. high, 3-5 mm. broad; bracts 8-10, elliptic- 

 obovate, with dull white scarious tips and margins; flowers 10-15; corollas white, 3 mm. long; 

 tube about 1 mm. long; lobes oblong; anther- tips acute; achenes elongate-obpyramidal, 

 4-angled, hirsutulous; squamellae 8, obovate, 1 mm. long, callous-thickened at the base. 



Type locality: Laredo, Texas. 



Distribution: Texas and New Mexico to Tamaulipas, Oaxaca, and Chihuahua. 



4. Florestina Liebmannii Schultz-Bip.; Greenman, Field Mus. 

 Publ. Bot. 2: 272. 1907. 



A canescent herb, probably annual, but somewhat indurate at the base; stem erect, 

 3-5 dm. high, terete below, striate above, strigillose as well as glandular-pubescent; lower 

 leaves opposite, petioled, simple; blades lanceolate, 2-3.5 cm. long, obtuse or acute, entire or 

 few-dentate, strigose-hispid on both sides, triple-ribbed; upper stem-leaves alternate and 

 gradually diminishing, linear; inflorescence corymbose, glandular; involucre turbinate, 5 mm. 

 high, 6 mm. broad; bracts about 8, elliptic-oblong to oblong-obovate, rounded at the apex, 

 with dirty-white scarious tips and margins, puberulent; flowers 12-14; corollas 3 mm. long; 

 lobes oblong; achenes narrowly obpyramidal, 3-4 mm. long, 4-5-angled, striate, pubes- 

 cent; squamellae 8, obovate or broadly spatulate, 1.5 mm. long, thickened at the narrow 

 base. 



Type locality: Boca del Rio, Vera Cruz. 

 Distribution: Vera Cruz. 



