Difference between revisions of "Ambrosia ilicifolia"
J. Arnold Arbor. 45: 425. 1964.
Basionym: Franseria ilicifolia A. Gray Proc. Amer. Acad. Arts 11: 77. 1876
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|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | ||
Latest revision as of 20:13, 5 November 2020
Shrubs, 30–50(–120+) cm. Stems erect. Leaves mostly alternate; petioles 0–2 mm; blades (green) elliptic to ovate, 25–60+ × 12–35+ mm, bases rounded to truncate, margins spiny-toothed, abaxial and adaxial faces ± hirtellous (on veins) and stipitate-glandular. Pistillate heads clustered, proximal to staminates; florets 2. Staminate heads: peduncles 2–8(–12) mm; involucres ± saucer-shaped, 9–15+ mm diam., ± hirtellous and stipitate-glandular; florets 20–40+. Burs: bodies ± globose, 6–8 mm, stipitate-glandular, spines 40–50+, scattered, subulate, 4–6 mm, tips straight or ± uncinate. 2n = 36.
Phenology: Flowering Jan–Apr.
Habitat: Sandy washes, benches
Elevation: 30–500 m
Distribution
Ariz., Calif., Mexico (Baja California, Sonora).
Discussion
Selected References
None.
Lower Taxa
None.