14 NORTH AMERICAN FLORA [Volume 34 



2-3 cm. long, glandular-puberulent, dentate or crenate-dentate ; peduncles 3-5 cm. long; 

 involucre hemispheric, about 6 mm. high and 8 mm. broad; bracts linear or linear-lanceolate, 

 acuminate, ciliate; ligules yellow, becoming pale, linear-oblong, 4 mm. long, 3-toothed; 

 style- appendages linear, obtuse, not hispidulous; disk-corollas about as long as the achenes, 

 glandular-puberulent; achenes oblong, short-hispid on the margins, 2 mm. long; pappus 

 of a crown of short bristle-like squamellae and a single plumose awn as long as the achene. 



Type locality: Los Angeles Bay, Lower California. 

 Distribution: Lower California. 



3. Perityle plumigera Harv. & Gray; A. Gray, Mem. Am. Acad. II. 



4: 77. 1849. 



A slender annual; stem glandular-puberulent, 1-2 dm. high, with strongly ascending 

 branches ; leaves mostly alternate; petioles less than 1 cm. long; blades ovate or the upper oblong- 

 lanceolate, glandular-puberulent, rarely more than 1 cm. long, coarsely toothed and sometimes 

 hastately lobed; peduncles 2-4 cm. long; involucre hemispheric, about 4 mm. high and 5-6 

 mm. broad; bracts oblanceolate, glandular-puberulent and ciliolate, short- acuminate; ray- 

 flowers 10-12; ligules yellow, oval, 3 mm. long, crenulate at the apex; corolla of the disk-flowers 

 longer than the achenes; appendages of the style-branches obtuse; achenes oval, 2 mm. long, 

 densely hirsute on the callous margin, the hairs longer than the crown of squamellae of the 

 pappus; awn solitary, longer than the achene and equaling the corolla, plumose. 



Type locality: "California," but probably now within Arizona or Sonora. 

 Distribution: Sonora and Sinaloa. 



4. Perityle marginata Rydberg, sp. nov. 



A glandular-puberulent annual; stem diffusely branched, 1-2 dm. high, leafy; leaves 



mostly opposite, only the uppermost alternate; petioles short, usually less than 1 cm. long; 



blades cordate, glandular-puberulent, 1-2 cm. long, acute, crenate-dentate; peduncles 2-3 cm. 



long; involucre hemispheric, about 5 mm. high and 8 mm. broad; bracts oblanceolate, acute, 



glandular-puberulent and ciliate towards the apex; ray-flowers 10-15; ligules yellow, oblong- 



oblanceolate, 5 mm. long, slightly 3-toothed; disk-corollas 2.5 mm. long, glandular-puberulent; 



style-appendages obtuse; achenes obovate, 2 mm. long and more than 1 mm. broad, with broad 



callous margin, slightly hirsute on the faces ; pappus of a small crown of squamellae and 2 short 



awns. 



Type collected at San Jose del Cabo, Lower California, March 25, 1911, Rose 16459 (herb. N. Y. 

 Bot. Gard.). 



Distribution: Lower California and Sinaloa. 



5. Perityle cuneata Brand. Zoe 1: 54. 1890. 



An erect annual; stem 4-7 dm. high, glandular- pubescent ; leaves petioled, the lower 

 opposite, the upper alternate; petioles 1-2 cm. long; blades broadly ovate, truncate or sub- 

 cordate at the base, irregularly serrate, glandular-puberulent, comparatively thick, 2-4 cm. 

 long; peduncles 1-5 cm. long; involucre hemispheric, 6-8 mm. high, 10-11 mm. broad; ray- 

 flowers 12-15; ligules yellow, oblong, 3-crenate, 6-8 mm. long; disk-corollas glandular-puberu- 

 lent, shorter than the achenes ; achenes oblanceolate-cuneate, short-hirsute on the callous margin; 

 pappus of 2 broad lacerate squamellae about one fifth, and two scabrous awns scarcely half 

 as long as the achene. 



Type locality: Sierra de Laguna, near Todos Santos, Lower California. 

 Distribution: Lower California. 



6. Perityle microglossa Benth. Bot. Voy. Sulph. 119. 1844. 



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

 Perityle microglossa effusa A. Gray, Syn. Fl. N. Am. I 2 : 322. 1884. 

 Perityle effusa Rose, Contr. U. S. Nat. Herb. 1: 104. 1891. 



An annual, often much branched; stem 2-5 dm. high, glabrate below, glandular-puberulent 



above; lower leaves usually opposite, the upper alternate, petioled; petioles 1-3 cm. long; 



blades ovate or cordate, 2-4 cm. long, mostly 3-5-cleft or the earlier not cleft, 3-ribbed, dentate; 



