114 NORTH AMERICAN FLORA [Volume 34 



10. Hymenoxys brachyactis Wooton & Standley, Contr. U. S. Nat. 

 Herb. 16: 192. 1913. 



A perennial or possibly biennial, with a thick tap-root; stem solitary, very stout, simple 

 below, branched above, 4-5 cm. high; leaves numerous, once or twice pinnatifid into linear- 

 filiform divisions scarcely 1 mm. broad; heads numerous, corymbose; peduncles 1-3 cm. 

 long; involucre 5 mm. high, 5-6 mm. broad, glabrate or glandular-granuliferous; outer bracts 

 about 8, united nearly half their length, carinate, the free portions lanceolate, acute; inner bracts 

 oval, abruptly mucronate-acuminate, villous on the margins; ligules pale-yellow, 3-4 mm. long, 

 cuneate-obovate; disk-corollas bright-yellow, sparingly glandular-puberulent, 3-3.5 mm. long; 

 tube about 1 mm. long; achenes villous, 2.5 mm. long; squamellae ovate-lanceolate, acuminate, 

 2 mm. long. 



Type locality: East View, New Mexico. 

 Distribution: Known only from the type locality. 



11. Hymenoxys Vaseyi (A. Gray) Cockerell, Bull. Torrey Club 



31: 493. 1904. 



Actinella Vaseyi A. Gray, Proc. Am. Acad. 17: 219. 1882. 

 Picradenia Vaseyi Greene, Pittonia 3: 271. 1898. 



A perennial, with a thick tap-root, scarcely cespitose; stem 3-5 dm. high, glabrate or mi- 

 nutely puberulent, striate, branched above; leaves 3-8 cm. long, dissected into 3-5 linear-filiform 

 divisions, glabrate, conspicuously punctate ; heads rather numerous in round-topped paniculate 

 corymbs; peduncles 2-5 cm. long; involucre turbinate, 6 mm. high, 8-10 mm. broad; outer 

 bracts 7-9, carinate, glandular-granuliferous, united more than half their length, the free portions 

 ovate-triangular; inner bracts broadly oval, rounded and mucronate at the apex, villous 

 and erose on the margins; ligules about 7 mm. long, 3 mm. wide; disk-corollas about 4 mm. 

 long; tube about 1 mm. long; achenes 3 mm. long, densely hirsute; squamellae oblong, nearly 



2 mm. long, obtuse or acutish. 



Type locality: Organ Mountains, New Mexico. 



Distribution: Organ Mountains of New Mexico. * 



12. Hymenoxys Cooperi (A. Gray) Cockerell, Bull. Torrey Club 



31: 394. 1904. 



Actinella Cooperi A. Gray, Proc. Am. Acad. 7: 359. 1868. 

 Picradenia Cooperi Greene, Pittonia 3: 272. 1898. 



Hymenoxys Cooperi Grayi Cockerell, Bull. Torrey Club 31: 495. 1904. 

 Hymenoxys Cooperi argyrea Cockerell, Bull. Torrey Club 31: 495. 1904. 



A perennial, with a tap-root and a somewhat cespitose crown; stems 5-10 dm. high, with 

 slender branches, finely puberulent or glabrate; leaves 4-10 cm. long, divided into 3-5 linear- 

 filiform divisions, glabrate and strongly punctate; heads in an open corymb; peduncles 3-10 

 cm. long; involucre somewhat turbinate, 5 mm. high, about 8-12 mm. broad; outer bracts 

 about 8, keeled, glabrate, united about one third their length, the free portions lanceolate; inner 

 bracts elliptic, acute, erose on the margins; ligules 8-10 mm. long, 3 mm. wide; disk-corollas 



3 mm. long, densely glandular-puberulent; achenes 3 mm. long, densely hirsute; squamellae 

 1-1.5 mm. long, obtuse or acute at the apex. 



Type locality: Providence Mountains, in the Mojave district, California. 

 Distribution: Southern California and Arizona. 



13. Hymenoxys quinquesquamata Rydberg, sp. nov. 



A perennial, with a tap-root, not cespitose; stem single, 3-5 dm. high, finely puberulent, 

 striate, branched above; leaves 5-10 cm. long, puberulent or glabrate, divided into 3-5 linear 

 divisions; heads numerous, corymbose; peduncles 3-5 cm. long; involucre turbinate, 7 mm. high, 

 8-10 mm. broad; outer bracts about 5, glabrate, carinate, united a little more than one third 

 their length, the free portions ovate, acute; inner bracts somewhat longer, broadly oval, 

 abruptly short-acuminate, erose on the margins and slightly villous; ligules 12-13 mm. long, 



