I. Sun Spurge (E. helioscopia). Annual herb with yellow green obovate leaves, the margin of upper half toothed. Milky juice used as a wart-cure. Waste places, June to October.
II. Broad-leaved Spurge (E. platyphyllos). Annual. Leaves broad, lance-shaped, sharp-pointed, toothed above middle. Fruit (capsule) warted. Fields and waste places from York southwards: rare. July to October.
III. Irish Spurge (E. hiberna). Perennial. Leaves thin, ovate, not toothed, tip blunt or notched; upper leaves heart-shaped. Glands of involucre purple, kidney-shaped. Hedges and thickets, rare; only in North Devon and South and West of Ireland. Flowers May and June. Juice used by salmon-poachers for poisoning rivers.
IV. Wood Spurge (E. amygdaloides). Perennial, stout, red, shrubby. Leaves obovate, thick, tough, reddish, 2 to 3 inches long, hairy beneath, lower on short stalks. Involucral glands half-moon shaped, yellow. Woods and copses, chiefly on clay soils. Flowers March to May.
V. Petty Spurge (E. peplus). Annual. Leaves thin, broadly obovate, on short stalks, ¾ inch long. Involucral glands half-moon shaped (lunate), with long horns. Waste ground, market-gardens and flower-beds. July to November.
VI. Dwarf Spurge (E. exigua). Annual. Much branched. Leaves very narrow and stiff. Involucres small, almost stalkless. Involucral glands, rounded with two blunt-pointed horns. Fields, especially on light soil. July to October.
VII. Portland Spurge (E. portlandica). Perennial, tufted, many-branched stems. Leaves tough, obovate acute, spreading. Involucral glands, lunate, with two long horns. Sandy shores, on South and West coasts, and in Ireland. May to August. Rare.
VIII. Sea Spurge (E. paralias). Perennial, bushy, many-stemmed, stout, reddish, woody below. Leaves narrow, concave, very thick, arranged in whorls. Points of involucral glands short. Sandy shores, July to October.
IX. Leafy-branched Spurge (E. esula). Perennial. Rootstock creeping. Stem slender. Leaves thin, narrow, sometimes toothed. Involucres small, on long stalks, glands lunate, with short straight horns. Woods and fields; Jersey, Forfar, Edinburgh, and Alnwick. July.
X. Cypress Spurge (E. cyparissias). Perennial. Rootstock creeping. Leaves very narrow, not toothed. Woods, England, June and July.
XI. Caper Spurge (E. lathyris). Biennial. Stem short and stout, 3 to 4 feet second year. Leaves narrow, broader at base, opposite, alternate pairs placed at right angles to each other (decussate). Copses and woods, June and July. Fruit used as a condiment.
XII. Purple Spurge (E. peplis). Annual. Stems prostrate, purple, glaucous. Leaves oblong, heart-shaped, thick, on short stalks, with stipules, opposite. Glands oblong. Very rare. On sandy coasts, South Wales, Cornwall to Hants, and Waterford. July to September.
All the species have milky sap. Poisonous.