Aphanostephus ramosissimus var. humilis

(Bentham) B. L. Turner & Birdsong

Phytologia 45: 501. 1980. 1980

Basionyms: Leucopsidium humile Bentham Pl. Hartw., 18. 1839
Synonyms: Aphanostephus arizonicus A. Gray Aphanostephus humilis (Bentham) A. Gray
Treatment appears in FNA Volume 20. Treatment on page 353.

Plants 6–15 cm. Involucres 4.7–7.5 mm. Ray florets 26-–35. Cypselae (1.1–)1.4–1.6 mm; pappi 0 or minutely ciliate rings 0.1–0.2 mm, sometimes nearly smooth. 2n = 8.


Phenology: Flowering Apr–Jun(–Oct).
Habitat: Sand and gravel bars, limestone soils, Larrea flats, mesquite savannas, roadsides, disturbed sites
Elevation: 700–1600 m

Distribution

V20-815-distribution-map.gif

Ariz., N.Mex., Tex., Mexico (Chihuahua, Coahuila, Durango, Nuevo León, Tamaulipas, Zacatecas).

Discussion

Selected References

None.

Lower Taxa

None.

Guy L. Nesom +
(Bentham) B. L. Turner & Birdsong +
Leucopsidium humile +
Ariz. +, N.Mex. +, Tex. +, Mexico (Chihuahua +, Coahuila +, Durango +, Nuevo León +, Tamaulipas +  and Zacatecas). +
700–1600 m +
Sand and gravel bars, limestone soils, Larrea flats, mesquite savannas, roadsides, disturbed sites +
Flowering Apr–Jun(–Oct). +
Illustrated +
Aphanostephus arizonicus +  and Aphanostephus humilis +
Aphanostephus ramosissimus var. humilis +
Aphanostephus ramosissimus +
variety +