42 NORTH AMERICAN FLORA [Voljjmk 34 



glandular-punctate; divisions obovate to oblong, usually again cleft or toothed; heads short- 

 peduncled; involucre hemispheric, 5 mm. high, 8 mm. wide; bracts about 10, elliptic, 

 concave, glandular-pubescent; ray-flowers 5-6; ligules light-yellow, broadly oval, 5 mm. long, 

 fully 3 mm. broad; tube of the disk-flowers densely glandular, 1.5 mm. long; throat about 

 1 mm. long; achenes cuneate, 2 mm. long, black, minutely scabrous, sub-triquetrous, i. e., 

 somewhat flattened, strongl} 7 keeled on the outer and obscurely so on the inner face. 



Type locality: Plains of Perote [Vera Cruz]. 

 Distribution: Southern Mexico. 



32. GALEANA Llave; Llave & Lex. Nov. Veg. Descr. 1: 12. 1824. 



Chlamysperma Less. Syn. Comp. 256. 1832. 



Slender, dichotomously branched annuals, more or less glandular-pubescent and with 

 glandular-punctate foliage. Leaves petioled, mostly opposite. Heads small, in leafy cymes, 

 slender-peduncled in the forks. Involucral bracts broad, concave, oval, 5 in number. Ray- 

 flowers 3, pistillate and fertile; ligules short, broadly cuneate, 3-toothed. Disk-flowers 3-4, 

 of these 1 or 2 hermaphrodite and fertile, the rest staminate ; corolla-tube of the hermaphrodite 

 flowers short, glandular; throat short-campanulate ; staminate corollas longer, glabrous and 

 with more funnelform throat. Achenes of the hermaphrodite flowers pear-shaped, triquetrous; 

 those of the rays broader and with the inner two angles with more or less corky, concave 

 wings with incurved and crenate margins. 



Type species, Galeana hastata Llave. 



Disk -corollas 5-toothed, some of them fertile; leaf-blades more than 1 cm. long, 

 mostly toothed; plants about 3 dm. high. 

 Leaf -blades lanceolate-hastate; achenes strongly tuberculate, on the back, his- 



pidulous on the margins. 1. G. hastata. 



Leaf -blades broadly ovate; achenes slightly tuberculate, glabrate. 2. G. pratensis. 



Disk-corollas 4-toothed, mostly sterile; leaf -blades mostly less than 1 cm. long; 



plant about 1 dm. high. 3. G. arenarioid.es . 



1. Galeana hastata Llave; Llave & Lex. Nov. Veg. Descr. 1: 12. 



1824. 



A dichotomously branched annual; stem about 3 dm. high, round-angled, glabrous 

 below, glandular-hispidulous above; leaves petioled, opposite; blades lanceolate, hastately 

 lobed or the upper entire, minutely puberulent and glandular-punctate, 1.5-2 cm. long; pe- 

 duncles fully 1 cm. long; involucre 3 mm. high, 2.5 mm. broad; bracts oval, minutely hairy, 

 concave; ligules less than 1 mm. long, deeply 3-toothed; corolla of the disk-flowers about 1 

 mm. long, 5-toothed; disk-achenes black, linear-cuneate, decidedly tuberculate, 2.5 mm. long; 

 ray-achenes large, with wings as broad as the body, decidedly tuberculate and minutely 

 hispidulous on the margins of the wings and the third angle. 



Type locality: San Jose del Corral. 

 Distribution: Vera Cruz to Chiapas. 



2. Galeana pratensis (H.B.K.) Rydberg. 



Unxia pratensis H. B. K. Nov. Gen. & Sp. 4: 279. 1820. 

 Chlamysperma pralense Less. Syn. Comp. 256. 1832. 

 Villanova pratensis Benth. & Hook. Gen. PI. 2: 405. 1873. 



A dichotomously branched annual; stem 2-3 dm. high, angular, glandular- pubescent ; 



leaves petioled, opposite; blades of the lower ones deltoid-ovate, truncate or cuneate at the 



base, coarsely serrate, triple-ribbed, glandular-pubescent and punctate, 2-3 cm. long; upper 



leaves more oblong and less toothed; peduncles in the forks, about 1 cm. long; involucre 



obovoid, 3 mm. high and nearly as broad; bracts 5, concave, oval, glandular-pubescent; ligules 



less than 1 mm. long; achenes black, glabrate, slightly tuberculate when ripe, 3 mm. long; 



wings of the marginal achenes at first light, turning dark, undulate, glabrous, rarely slightly 



tubercled. 



Type locality: Valladolid [Morelia], Michoacan. 



Distribution: Southern Mexico to Costa Rica. 



Illustrations: H. B. K. Nov. Gen. & Sp. pi. 401; E. & P. Nat. Pfl. 4 6 :/. 124, E, F. 



