Part 1, 1914] CARDUACEAE : HELENIEAE 17 



12 mm. broad, glandular-puberulent and sparingly viscid- villous; bracts lanceolate, acute; 

 ray-flowers 12-15; ligules white, 5 mm. long and 3 mm. broad, 3-toothed; disk-corollas fully 

 2 cm. long; tube fully equaling the throat; achenes oblong, 2 mm. long, hispidulous on the 

 faces, ciliate on the margins; pappus-crown of minute squamellae; awn solitary, barbellate, 

 shorter than the achene. 



Type collected at Cerralvo, Lower California, 1911, J. N. Rose 16880 (herb. N. Y. Bot. Gard.). 

 Distribution: Lower California. 



15. Perityle saxosa Brand. Zoe 5: 225. 1905. 



Galinsogeopsis spilanthoides Schultz-Bip. in Seem. Bot. Voy. Herald 307, in part. 1856. 



Perennial with many stems, 4-5 dm. high, puberulent; leaves opposite; petioles 1-2 cm. 



long; blades thin, elongate-deltoid, acuminate, coarsely dentate, truncate at the base, 2-5 cm. 



long, grayish-puberulent ; heads cymose-paniculate ; peduncles 2-6 cm. long; involucre 4 mm. 



high, 5 mm. broad; bracts oblanceolate, puberulent, acute; ligules white, 2-3 mm. long, 



1-1.5 mm. broad; disk-flowers 1 mm. long; tube about equaling the campanulate throat; 



achenes pubescent, short-ciliate on the mostly callous margins, 2 mm. long; pappus of a short 



crown of fimbriate squamellae and usually two unequal awns, the longer half as long as the 



achene, the other much shorter, or the latter or both wanting. 



Type locality: Cerro Colorado, Sinaloa. 

 Distribution: Sinaloa. 



16. Perityle spilanthoides (Schultz-Bip.) Rydberg. 



Galinsogeopsis spilanthoides Schultz-Bip. in Seem. Bot. Voy. Herald 307. 1856. 

 Pericome spilanthoides Benth. & Hook.; Hemsl. Biol. Centr. Am. Bot. 2: 215. 1881. 

 Perityle microcephala A. Gray, Proc. Am. Acad. 21: 391. 1886. 



A suffruticose perennial; stems 2-4dm.'long, slender, grayish-puberulent, diffusely branched, 



decumbent; leaves opposite; petioles 1-2 cm. long; blades deltoid or deltoid-ovate, truncate or 



cuneate at the base, 1-3 cm. long, coarsely dentate, puberulent; heads corymbose; peduncles 



1-5 cm. long; involucre about 4 mm. high and 5 mm. wide; bracts oblanceolate, puberulent; 



ray-flowers 10-12; ligules white, broadly oblong, or almost rectangular, 2 mm. long, coarsely 



3-toothed; disk-corollas 1.5-2 mm. long; style- appendages subulate; achenes oblong, densely 



ciliate on the margins, pubescent on the faces, barely 2 mm. long; pappus of a small crown of 



squamellae and 1 or 2 awns shorter than the achene. 



Type locality: Sierra Madre, northwestern Mexico [Sinaloa]. 

 Distribution: Arizona to Chihuahua, Durango, and Sinaloa. 



17. Perityle ciliata (L. H. Dewey) Rydberg. 



Laphamia ciliata L. H. Dewey, Bot. Gaz. 20: 425. 1895. 



A suffruticose perennial; stems 1-3 dm. high, slender, erect, grayish-puberulent; leaves 



opposite; petioles about 1 cm. long; leaf-blades deltoid- ovate, 1-1.5 cm. long, puberulent, 



mostly truncate at the base, acute at the apex, coarsely dentate ; heads 2-3 in small corymbs ; 



peduncles 1-5 cm. long; involucre about 5 mm. high and 7-8 mm. broad; bracts oblanceolate, 



acute, puberulent-canescent ; ray-flowers 10-12; ligules white, about 3 mm. long; disk-corollas 



glandular-puberulent, nearly 3 mm long; tube equaling the funnelform throat; achenes 2.5 mm. 



long, oblong, densely hirsute-ciliate on the margins, sparingly so on the faces; pappus of a 



short crown of squamellae, and 2 awns nearly equaling the achene in length. 



Type locality : Tucson Mountains, Arizona. 

 Distribution: Arizona. 



18. Perityle Rosei Greenman, Proc. Am. Acad. 40: 45. 1905. 



A perennial with a woody base; stem striate, puberulent, 1-2 dm. high; leaves opposite 

 or the uppermost alternate; petioles about 1 cm. long; blades ovate-triangular or somewhat 

 hastate, 1-3 cm. long, acute or rounded at the apex, entire or slightly sinuate, puberulent on 

 both sides; peduncles 1-3 cm. long; involucre about 5 mm. high; bracts oblanceolate, acute, 

 pubescent; ray-flowers 10-12; ligules white, oblong, 2 mm. long; disk-corollas about 2 mm. long; 



