Blake — New Plants from Sinaloa. 191 



glandular-based hairs; pedicels 2 mm. long or less; heads 8-flowered, slender, 

 4 mm. high; involucre 2 mm. high, the phyllaries about 7, somewhat un- 

 equal, linear, acutish, siccate, not distinctly nerved, gland-dotted and 

 sparsely puberulous; corollas white, glabrous, 2.7 mm. long, with slender 

 tube (O.S mm. long), funnelform throat, and triangular spreading teeth; 

 styles creamy; achenes 5-angled, whitish, sparsely puberulous, 1.3 mm. 

 long; pappus of about 15 fragile upwardly spinulose unequal awns 0.6 to 

 2 mm. long. 



Type in the U. S. National Herbarium, no. 1,011,731, collected in shady, 

 sheltered places, Sierra del Mineral del Tominil, District of San Ignacio, 

 Sinaloa, Mexico, altitude 1,500 meters, November 17, 1918, by A. E. 

 Salazar (no. 75). 



Distinguished from P. pubens A. Gray, the only other described species 

 with pubescent stem and branches, by its 8-flowered (not 11-flowered) 

 heads, and by the sparse pubescence of the lower surface of the leaves. 



Perymenium stenophyllum, sp. nov. 



Frutescent; branches very slender, gray, quadrangular, striate, sparsely 

 strigose and strigillose, glabrescent; leaves opposite, the blades 3 to 10 cm. 

 long, 1 to 3.5 mm. wide, narrowly linear, acuminate at both ends, firm, 

 revolute, 1-nerved, above dark green, strigose and strigillose with somewhat 

 tuberculate-based hairs, beneath strigose on costa, between the costa and 

 the margin densely canescent-tomentulose with crisped hairs; petioles 

 strigillose, 1 to 2 mm. long; heads about 8 mm. wide, in terminal clusters 

 of 3 to 7; pedicels slender striate, strigillose, 3 to 20 mm. long; disk hemis- 

 pheric, 4 to 5 mm. high, 4 to 6 mm. thick; involucre 4-seriate, graduated, 

 4 to 5 mm. high, the outermost phyllaries much smaller, ovate, obtuse, 

 indurated, with obscurely herbaceous tip, strigillose, ciliate, the inner ones 

 oval to oblong-oval, rounded, obscurely herbaceous-tipped, strigillose and 

 ciliate; corollas not seen; pales acute, strigillose on keel, 4 mm. long; ray 

 achenes trigonous, wingless, blackish, cross-striate, strigillose on the angles, 

 2.5 mm. long; disk achenes similar, biconvex, 2 mm. long; pappus of about 

 20 stoutish strigillose-ciliate deciduous awns, those on the angles 1.3 mm. 

 long, the others subequal, 0.8 mm. long. 



Type in the U. S. National Herbarium, no. 1,010,062, collected in cal- 

 careous soil, District of San Ignacio, Sinaloa, Mexico, August 20, 1918, by 

 A. E. Salazar (no. 501). 



This very distinct species is easily recognized by its narrowly linear 

 leaves, densely canescent-tomentulous beneath. 



Verbesina ortegae, sp. nov. 



Frutescent; branches greenish, striate, rather sparsely strigillose; leaves 

 alternate, the blades 7 to 10 cm. long, 1.5 to 2.5 cm. wide, elliptic-lanceo- 

 late, serrulate with about 11 pairs of depressed mucronulate teeth, feather- 

 veined (lateral veins about 9 pairs, translucent), not reticulate, mem- 

 branaceous, above deep green, rather sparsely strigillose, smooth, beneath 



