Part 2, 1915] CARDUACEAE : HELENIEAE L25 



Helenium mexicanum A. Cray, in Ton. Pacif. R. K. Rep. 4: 107. 1857. Not //. mexicanum II H 



K. 1820. 

 Helenium decurrens Vatkc, Ind. Sem. Ilort. Berol. 1875: App. 1875. Not Helenia decurrens 



Moench. 1794. 

 Heleniastrum puberulum Kimt/c, Rev. Gen. 342. 1891. 



A stout annual; stem 5-10 dm. high, angled, puberulent, branched above; basal leaves 

 oblanceolate, 1-2 dm. long, 3-4 cm. wide, puberulent, entire or denticulate; upper stem- 

 leaves linear-lanceolate, attenuate; peduncles 5-20 cm. long; bracts subulate, 8-10 mm. long, 

 hirsute; ray-flowers pistillate; ligules yellow, 4-6 mm. long, 3-5 mm. wide; disk brownish- 

 yellow to purplish-brown, 12-18 mm. broad when mature; corollas 2.5-3 mm. long; tube a mere 

 ring; throat elongate-campanulate; achenes fully 1.5 mm. long, hispidulous on the angles; 

 squamellae 1 mm. long, ovate or lanceolate, awn-tipped. 



Typk locality: California. 



DISTRIBUTION: California and northern Lower California. 



12. Helenium centrale Rydberg, sp. no v. 



A puberulent annual; stem 3-5 dm. high, puberulent as well as glandular-granulilVrou,, 

 winged, with ascending branches; basal leaves oblanceolate, 5-10 cm. long, puberulent, 

 entire or denticulate; stem-leaves narrowly linear-lanceolate, attenuate, strongly ascend- 

 ing; heads corymbose; peduncles 3-8 cm. long; involucral bracts subulate, 4 mm. long; ray- 

 flowers pistillate; ligules 4 mm. long, 3 mm. wide; disk brown, globose, about 1 cm. broad; 

 corollas 1.5 mm. long; tube minute; achenes 1.5 mm. long, hispid on the angles; squamellae 

 rounded-ovate, apiculate. 



Type collected at Cuajiniquilapa, Dep. Santa Rosa, Guatemala, 1892, Heyde &* Lux 3403 

 (herb. Columbia Univ.). 



Distribution: Chiapas, Guatemala, and Costa Rica. 



13. Helenium heterophyllum DC. Prodr. 5: 667. 1836. 



A puberulent annual; stem 4-6 dm. high, winged, puberulent, branched above; lower leaves 

 oblanceolate in outline, about 1 dm. long, variously pinnately lobed and dentate; upper stem- 

 leaves lanceolate, dentate, puberulent; heads corymbose, radiate; involucral bracts lance- 

 subulate, 4 mm. long; ray-flowers pistillate; ligules 4-5 mm. long, 2-3 mm. wide; disk globose 

 or slightly ovoid, 5-7 mm. broad; corollas 1.5 mm. long; tube minute; achenes about 

 1 mm. long, hispidulous on the angles; squamellae ovate, one third as long as the corolla, with a 

 very short awn-tip. 



Type locality: Tampico, Tamaulipas. 

 Distribution: Tamaulipas. 



14. Helenium linifolium Rydberg, sp. nov. 



A slender annual; stem about 3 dm. high, glabrous or nearly so, angled; leaves linear or 

 narrowly linear-lanceolate, entire or sparingly dentate, rarely sinuately lobed, 4-6 cm. long, 

 glabrous; heads corymbose; peduncles slender, 3-8 cm. long; involucral bracts 4-5 mm. long, 

 lance-subulate; ray-flowers pistillate; ligules cuneate, 10-12 mm. long, 5-7 mm. wide, purplish 

 with yellow tips, or yellow; disk purplish, 10-12 mm. broad; corollas about 2 mm. long, yellow 

 with purple limb; tube very short; achenes 1 mm. long, hispid on the angles; squamellae ovate, 

 with a long awn-tip, together fully three-fourths as long as the corolla. 



Type collected at Kingsville, Texas, April 11, 1905, S. M. Tracy 8949 (herb. N. Y. Bot. Gard.). 

 Distribution: Texas. 



15. Helenium laciniatum A. Gray, Proe. Am. Acad. 9: 203. 1874. 



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



A cinereous-puberulent annual; stem 1-3 dm. high, branched from the base; leaves 

 lanceolate or linear, 2-5 cm. long, mostly laciniate-pinnatifid, a little decurrent; peduncles 

 about 7 cm. long; involucral bracts linear-subulate, longer than the ligules; ray-flowers pistil- 

 late; ligules yellow, 4-6 mm. long; disk globose, 8-12 mm. broad; corollas 2 mm. long; 



