Leuciva

Rydberg in N. L. Britton et al.

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 glanddotted. 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 glanddotted; pappi 0. x = 18?

Distribution

sw United States, n Mexico

Discussion

Species 1.

Selected References

None.

Lower Taxa

... more about "Leuciva"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
John L. Strother +
Rydberg in N. L. Britton et al. +
decurrent +
compound +  and simple +
lobed;lanceolate;oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Woolly sumpweed +
villous +, strigillose +, hispidulous +, glabrous +  and warty +
scabrellous +  and tuberculate +
obcompressed +  and pyriform +
fertile +  and bisexual +
sw United States +  and n Mexico +
Greek leuc-, white, and Iva, a related genus, perhaps alluding to white indument of leaves +
glabrous +, stipitate-glandular +  and hairy +
staminate +  and pistillate +
winged +  and beaked +
dispersed +
disciform +  and discoid +
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
scarious to membranous +
membranous +  and scarious +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
hemispheric +
conspicuous +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
5 +  and 80 +
unequal +  and subequal +
in N. L. Britton et al., N. Amer. Fl. +
bearing subulate enations +, hairy +  and bristly +
convex;convex +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Ambrosieae +  and Undefined (tribe Undefined) subtribe Iveae +
Leuciva +
Asteraceae (tribe Heliantheae) subtribe Ambrosiinae +
campanulate +  and cylindric +
toothed +  and entire +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
shrub +  and subshrub +