Difference between revisions of "Cnidoscolus stimulosus"
Boston J. Nat. Hist. 5: 234. 1845.
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|genus=Cnidoscolus | |genus=Cnidoscolus | ||
|species=Cnidoscolus stimulosus | |species=Cnidoscolus stimulosus | ||
Latest revision as of 19:12, 5 November 2020
Plants 10–120 cm. Leaves: stipules 2–3.5 mm, margins entire; petiole 3–8 cm; blade ovate to round in outline, 5–17 × 4–12 cm, deeply lobed, lobes (1/2–)3/4–9/10 blade length, base broadly cordate to truncate, margins usually dentate, rarely entire, teeth and lobe apices acute to obtuse, not aristate. Staminate flowers: calyx salverform, tube 8–11 mm, distally straight or constricted, stinging hairs absent, lobes 7–10 mm; stamens of outer whorl shorter than inner, filaments of outer whorl distinct, of inner whorl connate most of length; staminodes 0. Pistillate flowers: sepals 10–15 mm; stigmas 12–24. Capsules 10–12 mm. Seeds brown, sometimes mottled, 8–9 mm. 2n = 36.
Phenology: Flowering Mar–Aug.
Habitat: Sandhills, dry sandy woods, sandy old fields.
Elevation: 0–600 m.
Distribution
Ala., Fla., Ga., Ky., La., Miss., N.C., S.C., Va.
Discussion
In Kentucky, Cnidoscolus stimulosus is occasionally naturalized along railroads. Although closely related to C. urens (Linnaeus) Arthur of Mexico, Central America, and South America, C. stimulosus differs in habit, leaf pubescence, and seed shape, and the two are treated here as distinct species.
Selected References
None.