340 
Euphorbiaceae. 
95. Euphorbiaceae. 
502. Buxus. Box. XXI, 15. 
1. Ls opp., elliptic, leathery, persistent (the upper and lower 
layer of their tissue easily separating!).—Thickety hills, 
especially in the Jura (wanting in U. L. S. A.); every¬ 
where in gardens. 4 sempervirens L. 1939. 
503. Euphorbia. Spurge. XI, 6. XXI, 25. 
1. Ls opp. in the form of a cross. Caps, large. Stem 50 to 
100 cm.—Uncultivated places, road-sides; T. W. V., pro¬ 
bably subspontaneous. 6 . . Lathyris L. 1940. 
— Ls alternate ........ 2 
2. Glands (of the calvx-like invol.) orbicular, or transverse 
oval .......... 3 
— Glands crescent-shaped, the points sometimes long. (Ls 
entire) ......... ,9 
3. Seed pitted. Ls obovate, narrowed to the petiole, denti¬ 
culate towards the top. Capsule smooth. — Cultivated 
places; market-gardens; everywhere. 5 Helioscopia L. 1941. 
— Seeds smooth ........ 4 
4. Caps, smooth or only finely spotted. Ls rather firm, 
glaucous, linear-lanceolate, the edges quite entire, glabr. 
Umbels with numerous rays.—Uncultivated stony places, 
near water; W. Y. L. Z. S. 6 Gerardiana Jacq. 1942. 
— Caps, with distinct tubercles. Ls gen. denticulate towards 
the top ......... 3 
5. Glands blackish red, rarely (v.chloradeniaBoiss.) greenish. 
Rt-stock horizontal, fleshy, articulate-dentate. Ls of the 
involucels triangular-oval, truncate at the base. E. alpi- 
gena Kern.!—Woods; distrib. 5 . dulcis L. 1943.*) 
— Glands wax- or brownish-yellow .... 6* 
6. Umbels with 5 — many rays; terminal umbel often exceeded 
by the lateral flowerless branches. Ls glabr. Stem 
80—150 cm. —Marshes, river-banks; T. W. Y. J. Z. 6 
palustris L. 1944. 
— Umbels with 3*—5 rays. Ls glabr. or more often hairy. 
Stem 30—60 cm . . . . . . 7 
7. Perenn. pis with numerous stems, spreading in a circle 
or ascending. Leaflets of the involucels elliptic, nar¬ 
rowed or rounded at the base, at last gen. yellow tinted 
with red.—Dry hills, road-sides; not everywhere. T. 5 
verrucosa Lam. 1945. 
— Ann. or bienn. pis. Stems erect or ascending-erect. Ls 
of the involucels almost triangular-oval, truncate at the 
base ......... 8 
*) Our form with glabr. capsules — E. purpurata Thuill. The typical 
form with hairy capsules and thick jointed rt-stock appears to be wanting in 
Switzerland. 
