About Euphorbia spinosa L.
Euphorbia has a simple umbella that is subquinquefida. The involucellis are ovate; the primary ones are triphyllous. The leaves are oblong and completely entire. The stem is shrubby. Diss. euph. 33. * Euphorbia is a spineless shrub with lanceolate and completely entire leaves. The flowers are solitary and terminal, and the involucres are triphyllous. Hort. cliff. 201. Roy. lugdb. 196. Euphorbia is a spineless shrub with dry, spiny branches. The leaves near the umbels are often ternate and ovate, and the flowers are solitary. Sauv. monsp. 51. Tithymalus maritimus spinosus. Bauh. pin. 291.
