Ambrosia monogyra

(Torrey & A. Gray) Strother & B. G. Baldwin
Madroño 49: 143. 2002.
Basionym: Hymenoclea monogyra Torrey & A. Gray Mem. Amer. Acad. Arts, n. s. 4: 79. 1849
Treatment appears in FNA Volume 21. Treatment on page 12. Mentioned on page 10.

Shrubs, 30–150(–400) cm. Stems erect. Leaves mostly alternate; petioles 0; blades mostly filiform, 5–30(–65+) × 0.5–1.5 mm, sometimes with 3(–5+) filiform lobes, abaxial faces glabrous or glabrate, often vernicose, adaxial faces densely scabrellous (white). Pistillate heads ± intermixed with staminates; florets 1. Staminate heads: peduncles 0–0.5 mm; involucres ± cup-shaped, 2–4 mm diam., ± glabrate, ± vernicose; florets 5–12+. Burs: bodies fusiform to pyriform, 4–5 mm, stipitate-glandular, wings 7–12+, mostly around middles, oblanceolate to cuneiform, 2–3 × 1–2 mm. 2n = 36.


Phenology: Flowering (May–)Aug–Nov.
Habitat: Desert washes, ravines
Elevation: 10–500 m

Distribution

V21-4-distribution-map.gif

Ariz., Calif., N.Mex., Tex., Mexico (Baja California, Baja California Sur, Chihuahua, Sinaloa, Sonora).

Discussion

Ambrosia monogyra may occur in western Nevada.

Selected References

None.

Lower Taxa

None.

... more about "Ambrosia monogyra"
John L. Strother +
(Torrey & A. Gray) Strother & B. G. Baldwin +
Hymenoclea monogyra +
Ariz. +, Calif. +, N.Mex. +, Tex. +, Mexico (Baja California +, Baja California Sur +, Chihuahua +, Sinaloa +  and Sonora). +
10–500 m +
Desert washes, ravines +
Flowering (May–)Aug–Nov. +
Franseria +  and Hymenoclea +
Ambrosia monogyra +
Ambrosia +
species +