1528 CONTRIBUTIONS FROM THE NATIONAL. HERBARIUM 



50. BUMFORDIA DC. Prodr. 5: 549. 1836. 

 I^eference: Robinson, A revision of the genus Rumfordia, Proc. Amer. Acad. 

 44: 592-596. 1909. 



Shrubs or herbs, with broad opposite leaves; heads j'ellow, radiate, several to 

 very numerous in terminal cymose panicles; involucre double, the outer phyl- 

 laries herbaceous, loose, the inner much smaller, embracing the ray achenes; ray 

 and disk fertile; achenes obovoid, thickened, epappose. 

 Leaves broadly ovate, regularly toothed, not lobed or angulate. 



1. R. floribunda. 

 Leaves rhombic-ovate or triangular-ovate, coarsely 1 or 2-lobed or toothed on 

 the angles. 

 Outer phyllaries granular-puberulous chiefly on margin; stem essentially gla- 

 brous 2. R. attenuata. 



Outer phyllaries glandular-pilose; stem crisped-pilosulous 3. R. oreopola. 



1. Rumfordia floribunda DC. Prodr. 5: 550. 1836. 



Rumfordia floribunda pubescens Greenm. Proc. Amer. Acad. 41: 261. 1905. 



Tepic to Oa.xaca; type from Mexico, without definite locality. 



Shrubby below, 2 to 4 meters high; leaf blades 8 to 19 cm. long, decurrent on 

 the petioles nearly or usually quite to the base, usually pilose beneath in the 

 axils of the main veins and along costa; panicle 10 to 22 cm. wide, very many- 

 headed; heads 1.8 to 3.5 cm. wide; ray corollas provided with a slender tube, 

 persistent, yellow becoming white. "Tacote amarillo" (Tepic). 



2. Rumfordia attenuata Robinson, Proc. Amer. Acad. 44: 594. 1909. 



Known only from the type locality, Sierra Madre of Michoacdn or Guerrero. 



Suffrutescent (?), 2.5 meters high; leaves rhombic-ovate, or the upper lanceo- 

 late, the larger 23 cm. long, 12 cm. wide, thin, acuminate, bearing one or two 

 large spreading teeth on each angle, narrowed to a subsessile base or short- 

 petioled; phyllaries 8 to 10 mm. long. 



3. Rumfordia oreopola Robinson, Proc. Amer. Acad. 44: 595. 1909. 

 Known only from the type locality, crest of the Sierra Madre, Michoac^n or 



Guerrero. 



Suffrutescent (?), 3 meters high; leaves triangular-ovate, about 10 cm. long, 

 6 cm. wide, short-petioled, coarsely about 2-toothed on each side and serrulate; 

 phyllaries 1.1 to 1.9 cm. long. 



51. RHYSOLEPIS Blake, Contr. Gray Herb. n. ser. 52: 36. 1917. 



Reference: Blake, Contr. Gray Herb. n. ser. 52: 36-37. 1917. 



Suffrutescent; leaves opposite or alternate, serrate; heads radiate, yellow, few 

 in terminal cymose panicles; involucre 3 or 4-seriate, graduate, of herbaceous- 

 tipped phyllaries; rays neutral; pales indurate, gibbous, cross-wrinkled, closely 

 embracing the disk achenes;, disk achenes strongly compressed; pappus of 2 awns 

 and 6 to 8 minute squamellae. 



Only the two species following are known. 



Leaves chieflj'^ alternate, oblong or ovate-oblong, subsessile 1. R. morelensis. 



Leaves opposite, ovate-lanceolate, on petioles 3 to 13 mm. long. 2. R. palmeri. 

 1. Rhysolepis morelensis (Greenm.) Blake, Contr. Gray Herb. n. ser. 52: 36. 

 1917. 



Viguiera morelensis Greenm. Proc. Amer. Acad. 40: 40. 1904. 



Morelos; type from Cuernavaca. 



Leaf blades 4 to 6.8 cm. long, 0.8 to 2 cm. wide; involucre 7 mm. high, the 

 two outer rows of phyllaries strongly reflexed, the two inner with only the tips 

 re flexed. 



