Ambrosia ambrosioides

(Delpino) W. W. Payne

J. Arnold Arbor. 45: 410. 1964

Basionyms: Xanthidium ambrosioides Delpino Studi Lign. Anemof. 63 (1871)
Treatment appears in FNA Volume 21. Treatment on page 12. Mentioned on page 10, 13.

Shrubs, 60–150+ cm. Stems erect. Leaves mostly alternate; petioles 10–35 mm; blades lanceolate to narrowly triangular, 50–150+ × 18–55+ mm, bases truncate to cordate, margins coarsely toothed (not spiny), abaxial and adaxial faces ± hirsutulous and gland-dotted. Pistillate heads clustered on lateral axes, proximal to staminates; florets 4–5. Staminate heads: peduncles 2–4(–12) mm; involucres ± saucer-shaped, 4–6+ mm diam., ± hirsutulous; florets 40–60+. Burs: bodies ± fusiform, 6–8+ mm, stipitate-glandular, spines 60–80+, scattered, subulate, 4–6 mm, tips uncinate. 2n = 36.


Phenology: Flowering Mar–May.
Habitat: Sandy soils, washes, banks
Elevation: (100–)500–1000+ m

Distribution

V21-7-distribution-map.gif

Ariz., Calif., Mexico (Baja California, Baja California Sur, Chihuahua, Durango, Sonora).

Discussion

Ambrosia ambrosioides has been reported from California; it may occur there.

Selected References

None.

Lower Taxa

None.

... more about "Ambrosia ambrosioides"
John L. Strother +
(Delpino) W. W. Payne +
Xanthidium ambrosioides +
Ariz. +, Calif. +, Mexico (Baja California +, Baja California Sur +, Chihuahua +, Durango +  and Sonora). +
(100–)500–1000+ m +
Sandy soils, washes, banks +
Flowering Mar–May. +
J. Arnold Arbor. +
Franseria +  and Hymenoclea +
Ambrosia ambrosioides +
Ambrosia +
species +