Euphorbia esula subsp. tommasiniana Euphorbia undulata, Bieb.

(b) Subsp. tommasiniana View in CoL (Bertol.) Nyman, Consp. 652 (1881)

(£. virgata Waldst. & Kit. , non Desf.; incl. E. subcordata Ledeb. , E. tenuifolia Lam. , E. uralensis Fischer ex Link ).

Axillary rays usually 2-12; leaves linear to lanceolate, sometimes widened and rounded at base, acute or subacute; umbel usually with 5-9 rays. 2« = 20. 5., E. & E.C. Europe; the hybrid with subsp. esula often naturalized elsewhere. E. leptocaula Boiss. in DC., Prodr, 15(2): 159 (1862) (£. astrachanica C. A. Meyer ex Prokh., E. borszczowii Prokh. ), from E. Romania and U.S.S.R., is like subsp. tommasiniana but usually smaller. It is often puberulent and usually has narrowly linear leaves up to 85 mm but less than 4 mm wide. E. sareptana A. Becker ex Boiss. in DC., Prodr. 15(2): 159 (1862) (£. tanaitica Paez. ), from S.E. Russia, is similar but has leaves up to 11 mm wide, oblanceolate to obovate or elliptic-obovate and strongly emarginate. They may merit subspecific rank.

100. E. undulata Bieb. View in CoL , FZ. Taur.-Cauc. 1:371 (1808).

Glabrous, glaucous ascending perennial up to 15 cm, simple or branched from the base, with 1-6 axillary rays and with a slender, extensive rhizome. Leaves 10-20 x 3-12 mm, oblanceolate to ellipticobovate; margins usually undulate. Ray-leaves like the cauline. Raylet-leaves ovate-trullate. Rays 2-5, once dichotomous. Capsule 3-5-4 mm, deeply sulcate, smooth. Seeds 2 mm, ovoid. Steppes and semi-deserts. S.E. Russia, W. Kazakhstan. Rs (C, E).

101. E. cyparissias L. View in CoL , Sp. Pl. 461 (1753) View Cited Treatment .

Glabrous perennial up to 50 cm, rhizomatous, usually unbranched at the base but with up to 16 axillary non-flowering branches and 0-7 axillary rays. Leaves 5-40 x 0-5-3 mm, linear, entire. Ray-leaves linear to oblong. Raylet-leaves reniform, rhombic or suborbicular. Rays (5-)9-18(-22), once or twice dichotomous. Glands with 2 horns. Capsule 3 x 3-5 mm, deeply sulcate, granulate on the keels. Seeds 1-75 mm, ovoid, somewhat shiny, grey. 2/i = 20, 40. • Most o f Europe except the extreme north and the extreme south, but only as an alien in most o f the north. Al Au Be?B1 Bu Cz G a Ge G r He Ho Hs Hu It Ju Po Rm Rs (C, W, E) Tu [Br D a Fe N o Rs (N, *B, K) Su].