22 NORTH AMERICAN FLORA [Voi^UME 3 



Heads discoid. 



Bracts narrowly linear; pappus-crown of squamellae present ; awn as long as 



the corolla. . 10- ^- aglossa. 



Bracts broadly linear; pappus-crown represented by a callous margin; 

 awn very small or wanting. 

 Leaf -blades deeply dissected. ll. L. dissecla. 



Leaf -blades merely crenate-dentate. 12. L. Lemmoni. 



1. Leptopharynx leptoglossa (Harv. & Gray) Rydberg. 



Perityle leptoglossa Harv. & Gray; A. Gray, Mem. Am. Acad. II. 4: 77. 1849. 



A perennial, woody below; branches puberulent; leaves alternate; petioles 1-2 cm. long; 



blades cordate, puberulent, 3-5-ribbed, double-crenate, acute, 1-1.5 cm. long; peduncles 3-5 



cm. long; involucre about 7 mm. high, 8-10 mm. broad; bracts linear, puberulent, acute; 



ligules yellow (?), 7-8 mm. long, linear; disk-flowers glandular-puberulent ; tube 1.5 mm. 



long; throat almost tubular, 3 mm. long; style-appendages filiform; achenes oblong, densely 



ciliate on the margins; squamellae of the pappus very short; awn solitary, barbellate-his- 



pididous, about as long as the achene. 



Type locality: "California." 

 Distribution: Sonora. 



2. Leptopharynx Parryi (A. Gray) Rydberg. 



Perityle Parryi A. Gray, PI. Wright. 2: 106. 1853. 



Laphamia Parryi Benth. & Hook.; Hemsl. Biol. Centr. Am. Bot. 2: 210. 1881. 



A perennial with a woody base; stems viscid-pilose and glandular-puberulent; leaves alter- 

 nate; petioles 1-2 cm. long; blades reniform or broadly cordate, glandular-puberulent, 2-3 cm. 

 broad, dentate with broad teeth and somewhat lobed, 3-5-ribbed; pedimcles 2-5 cm. long; 

 involucre about 8 mm. high, 8-10 mm. broad; bracts linear-oblanceolate, glandular-puberu- 

 lent, acuminate; ligules yellow, 5-6 mm. long, linear-oblong; disk-corollas glandular-puberu- 

 lent; tube 2 mm. long; throat trumpet-shaped, 3 mm. long; style-appendages attenuate-filiform; 

 achenes linear-oblong, densely villous-ciliate; hairs equaling the squamellae of the pappus; 

 awn solitary, barbellate-hispidulous, a little shorter than the disk-corolla. 



Type locality: Canon of the Rio Grande [Texas]. 

 Distribution: Texas and Chihuahua. 



3. Leptopharynx cordifolia Rydberg, sp. nov. 



A perennial with woody caudex; branches 1-2 dm. high, somewhat villous and glandular- 

 puberulent, decumbent or ascending, terete; leaves mostly opposite; petioles 1-4 cm. long; 

 leaf-blades broadly cordate, 3-5-ribbed, 1-4 cm. broad, doubly dentate, sparingly villous and 

 glandular-puberulent; peduncles 4-7 cm. long; involucre hemispheric, 9-10 mm. high, 10-15 

 mm. broad; bracts narrowly caudate-attenuate, villous and glandular; ray-flowers 15-20; 

 ligules yellow, linear-oblanceolate, 8-10 mm. long, 3-toothed; disk-corollas glandular-puber- 

 ulent; tube 2 mm. long; throat tubular, 3.5 mm. long; achenes oblong, 3 mm. long, pubescent 

 on the callous margins; pappus of a distinct crown of lanceolate squamellae, and a solitary, 

 scabrous awn as long as the disk-corolla. 



Type collected in the vicinity of Topolobampo, Sinaloa, Rose, Standley cf Russell 13294 (herb. 

 N. Y. Bot. Gard.). 



Distribution: Sonora and Sinaloa. 



• 4. Leptopharynx Lloydii (Rob. & Fern.) Rydberg. 



Pm/yZe Z./oydw Rob. & Fern. Proc. Am. Acad. 30: 118. 1894. 



A perennial; stem suffruticose at the base, 1-3 dm. high, cinereously viscid- villous and 

 glandular-puberulent, branched; leaves opposite or the upper alternate; petioles 1-2 cm. long; 

 blades ovate-deltoid, doubly dentate, truncate or subcordate at the base, 1.5-2.5 cm. long, 

 villous on both sides; peduncles 3-5 cm. long, villous and glandular- pubescent; involucre 

 7-8 mm. high, 8-12 mm. broad; bracts narrowly linear, attenuate, villous and glandular; 

 ray-flowers 18-20; ligules pale-yellow, 6 mm. long, 3-toothed ; disk-flowers glandular-puberulent; 

 tube slender, 2 mm. long; throat cylindric, 3-3.5 mm. long; style-branches with attenuate 



