Compilation
Euphorbia angustiflora

A dwarf much-branched very spiny leafless succulent about 1 ft. high or less. Branches 1/4– 1/2 in. in diam. (less when dried), mostly 4-angled, with the opposing angles constricted so as to form opposite teeth or lobes 1/4– 2/3 in. apart and nearly truncate at the top and sloping inwards below the spines to form the constriction, sometimes with only 3 spirally twisted toothed angles, glabrous. Leaves rudimentary, 1/2 lin. long and nearly as broad, deltoid-ovate, acute; soon deciduous. Spines in pairs at the apex of the teeth, 2–3 1/2 lin. long, slender but very rigid, diverging, dark brown, with a pair of prickles 1/2–1 lin. long at their base or sometimes nearly obsolete, seated on narrow horny bright chestnut-brown shields, decurrent 1 1/2–3 lin. below the spines, but never forming a continuous horny margin to the angles. Flowering-eyes nearly or quite touching the apex of the shields. Cymes on peduncles 1/2–1 lin. long, glabrous, very immature in the specimens seen, with 3 involucres, the central on a distinct peduncle 1/2– 2/3 lin. long, subglobose and 2/3– 3/4 lin. in diam., but evidently only in bud, glabrous with 5 glands and 5 cuneately subquadrate fringed lobes; glands immature 1/3 lin. broad, half-circular; lateral involucres in very young bud.