Hymenoxys insignis (A. Gray ex S. Wats.) Cockerell

Hymenoxys insignis (A. Gray) Cockerell, Torrc.ya 4: 170. 1904
Aclinella insipnis A. Gray, Proc. Am. Acad. 19: 31. 1883.
An annual or biennial; stem stout, 6 dm. high, branched; leaves twice or thrice pinnately divided into narrowly linear divisions, scarcely punctate; heads corymbose; peduncles listulose, 2-6 cm. long; involucre depressed-hemispheric, 10 mm. high, 20 mm. broad; receptacle decidedly convex; outer bracts linear-lanceolate, united only at the base; inner bracts similar but somewhat larger; ligules more than 1 cm. long; disk-corollas 3-4 mm. long; tube very short; achenes 3 mm. long, densely hirsute; squamellae broadly ovate, muticous, scarcely longer than the breadth of the achene.
Type locality: Lerios, in the mountains east of Saltillo, Coahuila. Distribution: Known only from the type Locality.

Hymenoxys excurrens (Cockerell) Rydberg, sp. nov
Hymenoxys chrysanthemoides excurrens Cockerell, Bull. Torrey Club 31: 501. 1904.
A leafy annual; stem 3-6 dm. high, branched above, striate, somewhat pubescent; leaves 3-6 cm. long, glabrate and not conspicuously punctate, pinnately dissected into narrowly linear divisions; heads many, corymbose-cymose; peduncles 4-7 cm. long; involucre 6 mm. high, 8-10 mm. broad, slightly pubescent or puberulent; outer bracts lanceolate, thick and convex on the back, with narrow herbaceous margins and tips, acuminate and the tips rather loose; ligules 8-9 mm. long, 3 mm. wide; disk-corollas 3 mm. long, decidedly glandular; achenes
3 mm. long; squamellae nearly 2 mm. long, ovate, acuminate, awn-pointed.
Type locality: Yuma, Arizona.
Distribution: Western Arizona, southern California, and Lower California.

Hymenoxys chrysanthemoides (H. B. K.) DC. Prodr. 5: 661
1836.
Actinea chrysanthemoides H. B. K. Nov. Gen. & Sp. 4: 298. 1820. Dugaldia chrysanthemoides Cass. Diet. Sci. Nat. 55: 271. 1828. Actinella chrysanthemoides A. Gray, Proc. Am. Acad. 19: 32. 1883.
An annual; stem 2-5 dm. high, branched above, striate, puberulent; leaves 2-4 cm. long, bipinnatifid into linear-filiform divisions, sparingly puberulent or glabrate; heads corymbose; peduncles 5-15 cm. long; involucre depressed-hemispheric, 6 mm. high, 12-18 mm. broad; outer bracts 12-16, linear, united only at the base, with spreading tips, pubescent; inner bracts similar, but longer and broader, acute, not erose; receptacle conic; ligules 8-10 mm. long, 3-4 mm. wide, deeply 3-lobed; disk-corollas 3.5-4 mm. long; tube glandular, about equaling the funnelform throat; achenes 3 mm. long, strongly hirsute; squamellae ovate,
2 mm. long, acuminate into an awn-tip.
Type locality: Moran [Hidalgo].
Distribution: Coahuila to Vera Cruz and Oaxaca.

Hymenoxys insignis is a Mexican species of flowering plant in the daisy family. It has been found in Coahuila, Nuevo León, and Chihuahua in northern Mexico.

Hymenoxys insignis là một loài thực vật có hoa trong họ Cúc. Loài này được (A.Gray ex S.Watson) Cockerell mô tả khoa học đầu tiên năm 1904.