Part 1, 1914] CARDUACEAE : HELENIEAE 43 



3. Galeana arenarioides (H. & A.) Rydberg 



■Chlamysperma arenarioides H. & A. Bot. Beech. Voy. 300. 1837. 



A dwarf annual; stem 0.5-1.5 dm. high, glandular-pubescent, intricately branched; 



leaves opposite, short-petioled or subsessile; blades rarely more than 1 cm. long, elliptic or oval, 



mostly entire, glandular-puberulent; peduncles about 5 mm. long; involucre 2.5 mm. high, 



2 mm. broad; bracts 5, oval, glandular-puberulent; ligules short; disk-corollas 4-toothed, 



few, mostly staminate, with glandular-puberulent tube; achenes of the rays oval, not tubercu- 



late, and margins of the wings scarcely undulate. 



Type locality: Tepic, Mexico. 

 Distribution: Tepic and Jalisco. 

 Illustration: H. & A. Bot. Beech. Voy pi. 64. 



33. ACHYROPAPPUS H.B.K. Nov. Gen. & Sp. 4: 257. 1820. 



Strigose and somewhat glandular-hispid annuals. Leaves opposite, twice ternate, 

 glandular-hispid, with linear segments. Heads terminating the branches, radiate. Involucre 

 hemispheric; bracts 5, obovate. Receptacle small, plain. Ray-flowers 5, pistillate, fertile; 

 ligules cuneate, white. Disk-flowers hermaphrodite and perfect, more numerous ; corollas short ; 

 tube pilose; throat campanulate. Achenes obpyramidal, 3-angled, hirsute. Pappus of 6-8 

 scarious obtuse squamellae. 



Type species, Achyropappus anthemoides H. B. K. 



1. Achyropappus anthemoides H.B.K. Nov. Gen. & Sp. 4: 259. 



1820. 



Bahia anthemoides A. Gray, Proc. Am. Acad. 15: 40. 1879. 



Schkuhria anthemoidesWedd.; Jacks. Ind. Kew. 4: 827, as synonym. 1895. Not 5. anthemoides Coult. 

 1895. 



A strigose and glandular annual; stem erect, branched, 2-4 dm. high, angular, glandular- 

 hispid, especially above; leaves opposite, twice ternate, glandular-hispid, and hirsute, petioled, 

 with linear segments; heads at the ends of the branches; peduncles 1-3 cm. long, glandular- 

 hispid; involucre hemispheric, 5 mm. high, 7 mm. broad; bracts 5, obovate, glandular-hispid, 

 with yellow margins; ligules 5, cuneate, 5 mm. long, white; achenes obpyramidal, 3-angled, 

 hirsute; squamellae 6-8, scarious, obovate-cuneate, obtuse, slightly costate at the base. 



Type locality: Near Ixtlahuaca. Mexico (state). 

 Distribution: South central Mexico. 

 Illustration: H. B. K. Nov. Gen. & Sp. pi. 390. 



Subtribe 6. HYMENOPAPPANAE. Heads radiate or discoid. In- 

 volucres from turbinate to hemispheric ; bracts mostly broad, flat or somewhat 

 convex, but not enclosing the marginal achenes, thin with more or less scarious, 

 colored or white ends and margins. Ray-corollas when present yellow or 

 white, ligulate, deciduous. Disk-corollas yellow, white or rarely tinged with 

 purple, with glandular tube usually longer than the campanulate or funnelform 

 throat. Achenes distinctly angled, from clavate to rather broadly obpyramidal. 

 Pappus squamellate or wanting. 



Principal bracts of the turbinate involucre 4 or 5, rarely 6—8, subtended by 

 1 or 2 smaller ones, punctate; leaves distinctly impressed-punctate. 

 Bracts of the involucre keeled, glabrous, conspicuously punctate; rays 



usually present; throat of the disk-corollas campanulate. 34. Tetracarpum. 



Bracts of the involucre not keeled, hirsute, not conspicuously punctate; 



rays wanting; throat of the disk -corollas funnelform. 35. CephalobEmbix. 



Principal bracts 6-12, not punctate; leaves if at all not conspicuously punc- 

 tate. 

 Disk-corollas with ovate to oblong lobes which are not twice as long as the 

 campanulate or cylindro-campanulate throat. 

 Disk-corollas with a campanulate throat and spreading lobes; bracts 

 obovate; squamellae obovate or ovate, rarely with excurrent 

 midrib, sometimes wanting. 



