Melampodium longicorne
Pl. Nov. Thurb. 321. 1854.
Annuals, 10–60+ cm. Leaf blades lance-elliptic or oblanceolate to lance-linear, 25–50+ × 3–12+ mm, lengths 3–4(–6+) times widths, margins ± dentate or entire. Peduncles 4–30+ mm. Outer phyllaries 5, connate 0–1/6 their lengths, ovate to elliptic, 4–6+ mm. Ray florets 7–12; corollas yellow, laminae oblong-elliptic, 1.2–1.5+ × 0.7–1+ mm. Disc florets 8–10+. Fruits 3–3.5+ mm. 2n = 60.
Phenology: Flowering Aug–Oct.
Habitat: Sandy, gravelly, or loamy soils
Elevation: 1200–1500 m
Distribution
Ariz., N.Mex., Mexico (Chihuahua, Sonora).
Discussion
Selected References
None.
Lower Taxa
None.