58 NORTH AMERICAN FLORA [Volume 34 



5. Florestina platyphylla Rob. & Greenm. Proc. Am. Acad. 32: 49. 



1896. . 



Schkuhria platyphylla Rob. & Greenm. Am. Jour. Sci. III. 50: 156. 1895. 



An erect stout annual; stem terete, striate, purplish, villous-pilose and more or less 

 glandular, simple below; lower leaves opposite, the upper alternate; petioles 1-2 cm. long; 

 blades rounded-ovate, truncate or caudate at the base, doubly crenate-dentate, triple-ribbed, 

 densely pubescent on both sides, 4-6 cm. long, slightly paler beneath; inflorescence corymbose- 

 paniculate, densely glandular; involucre 5 mm. high, 8 mm. broad; bracts about 5, 

 obovate, rounded at the apex, scarious-margined, glandular-pubescent; flowers about 20; 

 corollas 3 mm. long, purplish ; squamellae 8, ovate or suborbicular, callous at the base and with 

 a distinct midrib. 



Type locality: Monte Alban, Oaxaca. 

 Distribution: Oaxaca. 



6. Florestina latifolia (DC.) Rydberg. 



Palafoxia latifolia DC. Prodr. 5: 125. 1836. 



An erect stout annual; stem terete, glandular-pubescent, 5-7 dm. high, di- or tri-cho- 

 tomously branched; leaves opposite or the uppermost alternate; petioles 1-2 cm. long; blades 

 broadly ovate or subcordate, 2-4 cm. long, glandular-pubescent on both sides, sinuately den- 

 tate; inflorescence corymbose-paniculate, densely glandular; involucre turbinate, 7 mm. 

 high, 5-7 mm. broad; bracts oblanceolate or obovate, glandular-pubescent, more or less 

 purplish; corollas purplish; tube about 1 mm. long, slender; throat funnelform, 2 mm. long, 

 about equaling the oblong erect lobes; achenes black, 4 mm. long, sparingly hispid on the 

 ribs; pappus of 8 scarious squamellae callous on the petiole-like base, those of the angles 

 lanceolate, 6 mm. long with a strong midrib awn-tipped, the intermediate ones much smaller, 

 obovate. 



Type locality: Tehuantepec, Oaxaca. 

 Distribution: Oaxaca. 



Subtribe 7. PALAFOXIANAE. Heads discoid or radiate. Involucre 

 turbinate to nearly cylindric; bracts narrow in 1 or 2 series, herbaceous, often 

 with scarious or colored tips. Ligules when present rose-colored, cuneate, 

 deeply lobed. Disk-corollas rose-purple to flesh-colored; throat from scarcely 

 any to elongate-cylindric. Style-branches linear-filiform, hispidulous to or 

 even below the forking. Achenes clavate-obpyramidal to linear, 4-angled. 



Throat of the disk-corollas short -campanulate or scarcely any, much shorter than 

 the long linear lobes and the tube. 

 Involucral bracts subequal, narrow, colored only at the tips; disk-corollas cleft 



nearly to the slender tube; annuals; heads radiate or discoid. 41. OthakE. 



Involucral bracts imbricate; inner bracts almost wholly scarious, the outer 

 ones shorter; disk -corollas deeply cleft but with a short funnelform throat; 

 perennials; heads discoid. 42. PolypTERIS. 



Throat of the disk-corollas cylindraceous, much longer than the lobes and tube. 43. Palafoxia. 



41. OTHAKE Raf. New Fl. 4: 73. 1838. 



Erect, glandular, canescent or cinerous, annual herbs. Leaves except the lowermost 

 alternate, mostly entire. Heads corymbose or paniculate, radiate or discoid. Involucre 

 campanulate or obconic; bracts narrow, in 1 or 2 series, herbaceous, subequal or a few of the 

 outer ones shorter, usually colored, at least at the narrow tips. Receptacle small, flat, naked. 

 Ray-flowers, when present, pistillate, fertile; ligules pink or rose-colored, 3-cleft. Disk-flowers 

 many, hermaphrodite, fertile; corollas pink or rose-colored, with slender tube and 

 the limb 5-divided almost to the tube. Anthers entire or emarginate at the base. Style- 

 branches filiform, pubescent throughout. Achenes linear to narrowly obpyramidal, 4-angled, 

 pubescent. Pappus of 6-12 lanceolate, usually strongly ribbed squamellae, those of the outer 

 achenes often much shorter, obtuse, erose or fimbriate. 



Type species, Othake tenuifolium Raf. 



