Euphorbia agraria

M. Bieberstein

Fl. Taur.-Caucas. 1: 375. 1808.

Introduced
Synonyms: Tithymalus agrarius (M. Bieberstein) Klotzsch & Garcke
Treatment appears in FNA Volume 12. Treatment on page 298. Mentioned on page 296.

Herbs, perennial, with slender, spreading rootstock. Stems erect or ascending, unbranched or branched, 30–90 cm, glabrous. Leaves: petiole absent; blade oblong-elliptic, 20–65 × 9–20 mm, base truncate to auriculate, margins entire, apex obtuse to rounded, surfaces glabrous; venation conspicuously pinnate, midvein prominent. Cyathial arrangement: terminal pleiochasial branches 8–15, 1–2 times 2-branched; pleiochasial bracts similar in shape but shorter and narrower than distal leaves; dichasial bracts distinct, rhombic to reniform, base obtuse, margins entire, apex obtuse, mucronate; axillary cymose branches 12–23. Cyathia: peduncle 0–2 mm. Involucre campanulate, 2.2–3 × 1.8–2 mm, glabrous; glands 4, crescent-shaped; 0.6–1 × 1–2 mm; horns slightly divergent to convergent, 0.1–0.2 mm. Staminate flowers 15–20. Pistillate flowers: ovary glabrous; styles 1.2–2 mm, 2-fid. Capsules globose, 2–2.8 × 2.2–2.7 mm, 3-lobed; cocci rounded, smooth except finely granulate toward abaxial line, glabrous; columella 2.1–2.7 mm. Seeds gray or whitish, ovoid-oblong, 2–2.1 × 1.2–1.3 mm, smooth; caruncle ± rounded and flattened, 0.8 × 0.6 mm.


Phenology: Flowering and fruiting spring–summer.
Habitat: Grasslands, roadside banks, pastures.
Elevation: 200–1600 m.

Distribution

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Introduced; Alta., Sask., Kans., Mont., Nebr., N.Y., Pa., Wash., Wyo., Europe.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Euphorbia agraria"
Ricarda Riina +, Dmitry V. Geltman +, Jess A. Peirson +  and Paul E. Berry +
M. Bieberstein +
Alta. +, Sask. +, Kans. +, Mont. +, Nebr. +, N.Y. +, Pa. +, Wash. +, Wyo. +  and Europe. +
200–1600 m. +
Grasslands, roadside banks, pastures. +
Flowering and fruiting spring–summer. +
Fl. Taur.-Caucas. +
Introduced +
Tithymalus agrarius +
Euphorbia agraria +
Euphorbia subg. Esula +
species +