Cnidoscolus texanus

(Müller Arg.) Small

Fl. S.E. U.S., 706. 1903.

Common names: Texas bull-nettle
Weedy
Basionym: Jatropha texana Müller Arg. Linnaea 34: 211. 1865
Treatment appears in FNA Volume 12. Treatment on page 198. Mentioned on page 197.

Plants (30–) 40–50 (–100) cm. Leaves: stipules 3–4 mm, margins usually deeply toothed, rarely entire; petiole 5–18 cm; blade ± round in outline, 6–15 cm diam., deeply lobed, lobes 3/5–4/5 blade length, base broadly cordate, margins dentate, teeth and lobe apices acute, not aristate. Staminate flowers: calyx funnel-shaped, tube 12–17 mm, distally flaring, stinging hairs present, lobes 10–17 mm; stamens of outer whorl shorter than inner, filaments of outer whorl distinct or connate basally, of inner whorl connate most of length; staminodes 0. Pistillate flowers: sepals 15–25 mm; stigmas 12–24. Capsules 15–20 mm. Seeds brown, sometimes mottled, 14–18 mm. 2n = 36.


Phenology: Flowering mainly Apr–Jul(–Nov).
Habitat: Sandy open woods, fields, disturbed areas.
Elevation: 0–900 m.

Distribution

V12 594-distribution-map.jpg

Ark., La., Okla., Tex., Mexico (Tamaulipas)

Discussion

Both Cnidoscolus texanus and C. stimulosus are found in Louisiana, but their distributions are separated by about 250 km, with C. texanus found in the western half of the state and C. stimulosus restricted to St. Tammany and Washington parishes in the east.

Selected References

None.

Lower Taxa

None.

"connate" is not a number."cordate" is not a number."/2" is not declared as a valid unit of measurement for this property.

... more about "Cnidoscolus texanus"
connate +  and distinct +
Geoffrey A. Levin +
(Müller Arg.) Small +
Jatropha texana +
6 cm60 mm <br />0.06 m <br /> (15 cm150 mm <br />0.15 m <br />) +
lobed;round +
funnel--shaped +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Texas bull-nettle +
Ark. +, La. +, Okla. +, Tex. +  and Mexico (Tamaulipas) +
0–900 m. +
pistillate +  and staminate +
subtending +
Sandy open woods, fields, disturbed areas. +
leaf-opposed +, terminal +  and axillary +
palmate +  and pinnate +
dentate +  and entire +
intrastaminal +
connate;distinct +
5 cm50 mm <br />0.05 m <br /> (18 cm180 mm <br />0.18 m <br />) +
Flowering mainly Apr–Jul(–Nov). +
Fl. S.E. U.S., +
mottled;brown +
1.4 cm14 mm <br />0.014 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
distinct +  and connate +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
free +, connate +  and distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
[1-]2-3 times 2-fid +
Cnidoscolus texanus +
Cnidoscolus +
species +
not aristate;acute +
flaring +
1.2 cm12 mm <br />0.012 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
50 cm500 mm <br />0.5 m <br /> (100 cm1,000 mm <br />1 m <br />) +