Part 2, 1915J CARDUACEAE : IIELENIEAE 123 



3. Helenium quadridentatum Labill. Act. Soc. Hist. Xat. Paris 



1: 22. 1792. 



Rudbeckia alata Jacq. Ic. PI. Rar. 3: 16. 1793. 



Helenia linearifolia Moench, Meth. Suppl. 240. 1802. 



Helenium alatum C. C. Gmel. Hort. Carlsr. 129. 1811. 



Mesodetra alata Raf. Fl. Ludov. 141. IS 17. 



? Helenium quadripartitum Link, Knum. 2: 338. 1822. 



Helenium Miller i Schultes; DC. Prodr. S: 566, as svnonym. 1836. 



? Helenium discovatum Raf. New Fl. 4: 81. 1838. 



Heleniastrum quadridentatum Kuntze, Rev. Gen. 342. 1891. 



A paniculately branched annual or biennial; stem 3-10 dm. high, glabrous or sparingly 

 puberulent; lower leaves elliptic, oblanceolate, or oblong, pinnately lobed, about 1 dm. long; 

 upper leaves entire, lanceolate or linear-lanceolate, acute or acuminate, decurrent into the 

 wings of the stem; peduncles 5-8 cm. long; involucre about 1 cm. broad; bracts narrowly linear 

 or subulate, soon reflexed; receptacle oblong; ligules yellow, broadly cuneate, 3-5 mm. long; 

 disk oblong, at least in fruit, 8-10 mm. broad, 10-15 mm. long; corollas little more than 1 mm. 

 long; tube a minute ring; throat campanulate; limb usually 4-toothed; achenes about 1 mm. 

 long, hispidulous on the angles; pappus of minute rounded squamellae. 



Type locality: Louisiana; described from cultivated plants. 



Distribution: South Carolina to Florida, Texas, Vera Cruz, and Yucatan; Martinique. 

 Illustrations: Act. Soc. Hist. Nat. Paris 1: pi. 4; Lam. Tabl. Encyc. pi. 688, f. 2; Bot. 

 Reg. pi. 598; Jacq. Ic. PL Rar. pi. 593. 



4. Helenium stenopterum Rydberg, sp. now 



A slender simple annual; stem about 3 dm. high, slender, almost wingless, often purple- 

 tinged below, puberulent; leaves linear, 2-3 cm. long, 2-4 cm. wide, puberulent, entire, not 

 conspicuously decurrent; heads 1-4; peduncles 4-8 cm. long; involucral bracts linear, 2-4 mm. 

 long, early reflexed; ray-flowers pistillate; ligules 6-8 mm. long, cuneate, 3-lobed; disk globose, 

 brown, 7-8 mm. broad; corollas 2 mm. long, puberulent; tube a mere short ring; throat deeply 

 campanulate; achenes about 1 mm. long, hispidulous on the ridges; squamellae rounded- 

 obovate, about one fourth as long as the achenes. 



Type collected at Media Luna, near Rio Verde, San Luis Potosi, 1904, Palmer 64 (U. S. Nat. 

 Herb.). 



Distribution: San Luis Potosi. 



5. Helenium elegans DC. Prodr. 5: 667. 1836. 



Helenium microcephalum bicolor T. & G. Fl. N. Am. 2: 385. 1842. 

 Heleniastrum elegans Kuntze, Rev. Gen. 342. 1891. 



A tall annual or biennial; stem 3-10 dm. high, branched above, glabrous, winged; lower 

 leaves 7-10 cm. long, glabrous, oblanceolate, more or less dentate; upper leaves narrowly 

 lanceolate or almost linear, acute, decurrent; heads corymbose; peduncles 3-5 cm. long; 

 involucral bracts linear-subulu 2-3 mm. long; receptacle depressed-hemispheric; ray- 

 flowers pistillate; ligules yelloi ] partly brown at the base, cuneate, 5-7 mm. long, 

 3-toothed; disk brown or purpl : ' ; 8 mm. broad; corollas 2 mm. long; tube a minute ring; 

 throat deeply campanulate; ach- long, hispidulous on the angles; squamellae rounded, 

 minute. 



Type locality: Near Be [now Texas). 



Distribution: Louisiana, • rtheastern Mexico. 



6. Helenium r ; crocephalum DC. Prodr. 5: 667. 1836. 



? Helenium lexanum Buckl. Pro 1861:460. 1862. 



Heleniastrum microcephalum Kui.i • ' '■ i. 342. 1891. 



A freely branching annual . dm. high, glabrous, winged; leaves lanceolate to 

 oblong-ovate, 3-6 cm. long, acut t, the lower often toothed; heads numerous, corym- 

 bose; peduncles 2-4 cm. long; u racts linear to subulate, 3-4 mm. long, reflexed; 

 ray-flowers pistillate; ligules yel m. long, cuneate, 3-lobed; disk subglobose, 5-6 



