Tagetes triradiata Greenm.

Tagetes triradiata Greenman, Proc. Am. Acad. 32: 310. 1897
A glabrous annual; stem 3-5 dm. high, sulcate, striate, tinged with purple, with ascending branches; leaves pinnate, mostly opposite, the upper alternate; leaflets 15-21, narrowly lanceolate or oblanceolate, serrate, often with bristle-pointed teeth, 10-16 mm. long; heads cymosepaniculate; peduncles 2-3 cm. long; involucre subcylindric or somewhat fusiform, 10-15 mm. long, 4 mm. broad, greenish-purple; bracts 3-5, with deltoid obtuse tips, and with two lateral rows of 4 or 5 linear glands and 2-4 glands in the free portion; ligules bright-yellow, flabelliform, 2-3 mm. long, retuse or 3-lobed; disk-corollas puberulent, 6 mm. long; achenes 6-7 mm. long, appressed-hispidulous; pappus variable, the squamellae usually 6, 1-3 (rarely 4 or 5) of them subulate, hispidulous, 5-6 mm. long, and the rest linear, truncate, about half as long.
Type locality: Pedigoal, Valley of Mexico. Distribution: Mexico (State) to Vera Cruz.

Tagetes triradiata is a Mexican species of marigold in the family Asteraceae. It is native to central Mexico (Puebla, Morelos, México State, D.F., Veracruz).

Tagetes triradiata is an hairless annual herb up to 50 cm (20 inches) tall. Leaves are pinnately compound with 15-21 leaflets. One plant produces numerous small flower heads in a flat-topped array, each containing 3 bright yellow ray florets surrounding several yellow disc florets.