Leuciva

Rydberg

in N. L. Britton et al., N. Amer. Fl. 33: 8. 1922.

Common names: Woolly sumpweed
Etymology: Greek leuc-, white, and Iva, a related genus, perhaps alluding to white indument of leaves
Treatment appears in FNA Volume 21. Treatment on page 29. Mentioned on page 9, 25.

Perennials (sometimes flowering in first year), 20–60+ cm. Stems erect, branching from bases and/or distally. Leaves cauline; mostly alternate; petiolate; blades lanceolate to oblanceolate, laciniately pinnately lobed, abaxial faces ± lanate, adaxial ± tomentose, both usually gland-dotted. Heads discoid or disciform, in (ebracteate) paniculiform arrays. Involucres ± hemispheric, 2–4+ mm diam. Phyllaries persistent, 5+ in 1(–2) series, distinct, outer 5 herbaceous, inner 0 or scarious to membranous. Receptacles convex, epaleate. Pistillate florets 0 or 3–5; corollas whitish, tubular, or 0. Functionally staminate florets 5–12+; corollas whitish, funnelform, lobes 5, erect (filaments connate, anthers coherent or distinct). Receptacles convex, epaleate. Cypselae pyriform, ± obcompressed, densely gland-dotted; pappi 0. x = 18?

Distribution

sw United States, n Mexico.

Discussion

Species 1.

Selected References

None.

Lower Taxa

... more about "Leuciva"
John L. Strother +
Rydberg +
Woolly sumpweed +
sw United States +  and n Mexico. +
Greek leuc-, white, and Iva, a related genus, perhaps alluding to white indument of leaves +
in N. L. Britton et al., N. Amer. Fl. +
Undefined (tribe Undefined) subtribe Ambrosieae +  and Undefined (tribe Undefined) subtribe Iveae +
Leuciva +
Asteraceae (tribe Heliantheae) subtribe Ambrosiinae +