24 NORTH AMERICAN FLORA [Voi^ume 34 



9. Leptopharynx gilensis (M. E. Jones) Rydberg. 



Laphamia gilensis M. E. Jones, Zoe 2: 15. 1891. 



A suffruticose perennial with shrubby base; stem 1-2.5 dm. high, glabrous, striate and 



erect; leaves mostly opposite; petioles 1.5-2 cm. long; blades about 1 cm. long, ovate or 



broadly ovate in outline, 3-ribbed, those of the lower leaves merely dentate, those of the 



rest 3-lobed and dentate, puberulent and somewhat glutinous; heads solitary at the ends of 



the branches; peduncles 1-3 cm. long; involucre hemispheric, about 6 mm. high and 1 cm. 



broad; bracts broadly oblanceolate, acute; ligules yellow, about 5 mm. long; disk-flowers 



many; corollas 5 mm. long; tube 1.5 mm. long, glandular, much shorter than the cylindric 



throat; achenes 3.5 mm. long, slightly puberulent, sparingly short-ciliate on the margins; 



pappus of a callous margin and a single awn 3 mm. long. 



TypR locality: Putnam's Ranch, near Gila River, Arizona. 

 Distribution: Known only from the type locality. 



10. Leptopharynx aglossa (A. Gray) Rydberg. 



Perityle aglossa A. Gray, PI. Wright. 2: 107. 1853. 



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



A perennial with woody base; stem 1-1.5 dm. high, glandular-puberulent ; leaves opposite 

 and alternate; petioles 1-3 cm. long; blades rounded cordate, deeply lobed and coarsely dentate, 

 2-5 cm. broad; peduncles 2-5 cm. long; involucre hemispheric, 8 mm. high, 9-13 mm. 

 broad ; bracts narrowly linear, attenuate ; ray-flowers wanting ; disk-corollas slender, glandular- 

 puberulent; tube 1.5-2 mm. long; throat cylindric, fully 3 mm. long; achenes linear-oblong, 

 ciliate on the slightly callous margins, 3 mm. long; hairs nearly equaling the squamellae of the 

 pappus; awn solitary, barbellate, equaling the corolla. 



Type locality: Canon of the Rio Grande [according to label Arroyo San Carlos], Texas. 

 Distribution: Western Texas. 



11. Leptopharynx dissecta (Torr.) Rydberg. 



Laphamia dissecta Torr.; A. Gray, PI. Wright. 2: 81. 1853. 



Perityle dissecta A. Gray, Syn. Fl. N. Am. l^: 320. 1884. 



Laphamia Lemmoni pedata A. Gray, Proc. Am. Acad. 16: 101. 1880. 



A low perennial with woody caudex; stem 1-2 dm. high, branched, villous and glandular- 

 puberulent; leaves mostly alternate, suborbicular or cordate, twice pedately dissected into 

 oblong-linear or oblong lobes, villous; heads short-peduncled at the ends of the branches; 

 involucre campanulate, 5-6 mm. high, 4-5 mm. broad; bracts linear, boat-shaped, villous; rays 

 none; disk-flowers about 20; corollas 3 mm. long; tube much shorter than the trumpet-shaped 

 throat; achenes oblong, pubescent, with a callous border at the apex; awn solitary or often 

 wanting. 



Type locality: Presidio del Norte. 

 Distribution: Western Texas to Arizona. 



12. Leptopharynx Lemmoni (A. Gray) Rydberg. 



Laphamia Lemmoni A. Gray, Proc. Am. Acad. 16: 101. 1880. 



A suffruticose perennial with a thick woody caudex; stems depressed, spreading, branched, 

 less than 1 dm. high, villous; leaves opposite; petioles about 1 cm. long, villous; blades cordate- 

 orbicular, 5-7-lobed and incised, 1-1.5 cm. long, villous and glandular; heads solitary; peduncles 

 about 1 cm. long; involucre 6 mm. high and fully as broad; bracts oblanceolate, boat-shaped 

 at the base, villous; rays none; disk-corollas pale-yellow, 3 mm. long; tube about equaling the 

 throat; achenes oblong, hirsutulous; pappus of a delicate awn or wanting. 



Type locality: Near Camp Lowell, Arizona. 

 Distribution: Arizona. 



15. LAPHAMIA A. Gray, PI. Wright. 1: 99. 1852. 



Low suffruticose perennials, with rather thick woody bases and many stems. Leaves 

 opposite, or alternate, or both, with ovate or lanceolate toothed blades, more or less punctate. 



