Perityle microglossa Benth.

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 2-4 dm.flong, 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.

Perityle microglossa Benth. Bot. Voy. Sulph. 119. 1844
Perityle Acmella Harv. & Gray; A. Gray, Mem. Am. Acad. II. 4: 77. 1849. Perityle microglossa ejfusa A. Gray, Syn. Fl. N. Am. 1^: 322. 1884. Perityle ejfusa 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;. the upper ones often hastately lobed and narrower; peduncles 1-3 cm. long, glandular-puberulent; involucre hemispheric, about 5 mm. high and 7 mm. broad; bracts narrowly oblanceolate, acuminate, glandular-puberulent; ray-flowers 10-12; ligulcs light-yellow or white, 2 mm. long, with 3 rounded teeth; disk-corollas glandular-puberulent, about as long as the achenes; achenes oblong, hirsute on the callous margins; faces slightly hirsute; pappus of a small crown of lanceolate squamellae, rather shorter than the hairs, and 2 unequal awns scarcely half as long as the achene.
Type locality: Realejo, Nicaragua.
Distribution: Southern California and Arizona to Tepic and San Luis Potosi; Nicaragua.

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 oblonglanceolate, 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; rayflowers 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.

Perityle microglossa là một loài thực vật có hoa trong họ Cúc. Loài này được Benth. mô tả khoa học đầu tiên năm 1845.