Euphorbia corollata |
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eastern flowering spurge, flowering spurge, floweringspurge euphorbia |
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Habit | Herbs, perennial, with deep, spreading rootstock. |
Stems | erect or ascending, usually unbranched, occasionally few branched, solitary or few, previous year's dead stems not persistent, 20–100 cm, glabrous or slightly pilose to villous. |
Leaves | alternate, ascending; stipules 0.1–0.2 mm; petiole minute or absent; blade oblanceolate, obovate, or elliptic, 25–55 × 5–12 mm, base cuneate to rounded, margins entire, occasionally slightly revolute, apex rounded to subacute, abaxial surface glabrous or pilose to villous, adaxial surface usually glabrous, rarely villous; venation occasionally obscure on small leaves, midvein conspicuous. |
Involucre | campanulate, 1.2–1.5 × 1.2–1.5(–2) mm, glabrous or moderately puberulent (especially near glands); glands 5, green, reniform, 0.5 × 0.8–1 mm; appendages white, flabellate, 2.5–3.5(–4.5) × 2.5–3.2 mm, entire. |
Staminate flowers | 20–25. |
Pistillate flowers | ovary glabrous; styles 0.8–1.4 mm, 2-fid at apex to 1/2 length. |
Capsules | globose, 2.3–3 × 3.5–4.2 mm, glabrous; columella 2–2.5 mm. |
Seeds | white or light gray, ovoid, 2.5–2.8 × 2.2 mm, with shallow and coarse depressions; caruncle absent. |
Cyathia | in terminal pleiochasia, dichasial bracts occasionally whorled or rarely alternate; peduncle (1.5–)5–11(–13) mm (proximal to 70 mm), glabrous. |
Euphorbia corollata |
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Phenology | Flowering and fruiting early summer–fall. |
Habitat | Prairies, open fields, upland woods, glades, barrens, borders of swamps, roadsides, disturbed sites. |
Elevation | 0–1300 m. (0–4300 ft.) |
Distribution |
AL; AR; CT; DE; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; NE; NH; NJ; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WI; WV; ON
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Discussion | Euphorbia corollata is morphologically variable and widely distributed across a large part of eastern North America. The species appears to be expanding its range, as adventive populations have been reported from disturbed habitats at the northern edge of its range in Maine, Massachusetts, Michigan, Minnesota, New Hampshire, South Dakota, and Vermont. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 244. |
Parent taxa | Euphorbiaceae > Euphorbia > sect. Alectoroctonum |
Sibling taxa | |
Synonyms | E. corollata var. molle, E. corollata var. viridiflora, E. marilandica, E. olivacea, Tithymalopsis corollata, T. olivacea |
Name authority | Linnaeus: Sp. Pl. 1: 459. (1753) |
Web links |