Euphorbia hexagona

Nuttall ex Sprengel

Syst. Veg. 3: 791. 1826.

Common names: Six-angle spurge
IllustratedEndemic
Treatment appears in FNA Volume 12. Treatment on page 247. Mentioned on page 240, 241.

Herbs, annual, with taproot. Stems erect, unbranched or branched, 30–70 (–100) cm, sparsely hispid, occasionally densely so at distal nodes. Leaves opposite; stipules (0–) 0.1 mm; petiole 1–4 mm, pilose; blade linear-filiform, linear, or elliptic, 21–40 × 0.9–7.5 mm, base attenuate, margins entire, apex acute, abaxial surface sparsely hispidulous to strigillose, adaxial surface glabrous; venation obscure, only midvein conspicuous. Cyathia solitary in leaf-axils or in terminal cymes or dichasia; peduncle 1–2.1 mm, strigillose. Involucre campanulate, 1–1.5 × (1–) 1.5–1.8 mm, hispid; glands 5, green to deep red, elliptic to reniform, 0.5 × 0.8–1 mm; appendages white to green, tinged red, deltate to ovate, 0.7–1.7 × (0.9–) 1.3–1.5 mm, entire. Staminate flowers 15–30 (–40). Pistillate flowers: ovary glabrous; styles 0.7–1.1 mm, 2-fid nearly entire length. Capsules subglobose to broadly ovoid, 4.7–6.5 × 4.9–6.5 (–7.1) mm, glabrous; columella 3.5–4.5 mm. Seeds dark-brown or dark gray, ovoid, 3.4 × 2.7 mm, rugose, whitish glaucous; caruncle absent.


Phenology: Flowering and fruiting late summer–fall.
Habitat: Sand prairies, other sandy soil habitats, stream banks, sand bars, damp places.
Elevation: 200–1300 m.

Distribution

V12 578-distribution-map.jpg

Ark., Colo., Ill., Iowa, Kans., Minn., Mo., Mont., Nebr., N.Mex., Okla., S.Dak., Tex., Wis., Wyo.

Discussion

Euphorbia hexagona is native to the central United States and is most common from southern South Dakota to Oklahoma and northern Texas.

Selected References

None.

Lower Taxa

None.

"connate" is not a number. "distinct" is not a number."entire" is not a number.

... more about "Euphorbia hexagona"
sparsely hispidulous +  and strigillose +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
tinged red;white;green +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
deltate +  and ovate +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Jess A. Peirson +, Victor W. Steinmann +  and Jeffery J. Morawetz +
Nuttall ex Sprengel +
attenuate +
Alectoroctonum +
2.1 cm21 mm <br />0.021 m <br /> (4 cm40 mm <br />0.04 m <br />) +
linear-filiform +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
whorled +  and not opposite +
cymose +, few-branched +  and unbranched +
additional +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.71 cm7.1 mm <br />0.0071 m <br />) +
0.47 cm4.7 mm <br />0.0047 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
subglobose +  and broadly ovoid +
0.49 cm4.9 mm <br />0.0049 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
exfoliating +
ceraceous +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Six-angle spurge +
Ark. +, Colo. +, Ill. +, Iowa +, Kans. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.Mex. +, Okla. +, S.Dak. +, Tex. +, Wis. +  and Wyo. +
200–1300 m. +
pistillate +  and staminate +
green +  and deep red +
subtending +
elliptic +  and reniform +
0.8mm +  and 1mm +
Sand prairies, other sandy soil habitats, stream banks, sand bars, damp places. +
pleiochasial +  and dichasial +
axillary +  and terminal +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
campanulate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
caducous +, deciduous +  and persistent +
bractlike +
palmate +  and pinnate +
crenulate +
0.1 cm1 mm <br />0.001 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
connate;distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering and fruiting late summer–fall. +
opposite +  and whorled +
with white margins +  and green +
whitish;dark gray;dark-brown +
3.4 cm34 mm <br />0.034 m <br /> (?) +
2.7 cm27 mm <br />0.027 m <br /> (?) +
Illustrated +  and Endemic +
free +, connate +  and distinct +
branched +  and unbranched +
70 cm700 mm <br />0.7 m <br /> (100 cm1,000 mm <br />1 m <br />) +
prostrate +  and decumbent +
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +
0 cm0 mm <br />0 m <br /> (0.01 cm0.1 mm <br />1.0e-4 m <br />) +
deciduous +  and persistent +
0.1 cm1 mm <br />0.001 m <br /> (?) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (?) +  and 0.11 cm1.1 mm <br />0.0011 m <br /> (?) +
inconspicuous +
hairy +  and glabrous +
Agaloma +  and Tithymalopsis +
Euphorbia hexagona +
Euphorbia sect. Alectoroctonum +
species +
in terminal monochasia +  and solitary +
10 +, 9 +, 8 +, 7 +  and 6 +