i think its euphorbia
Euphorbia lactea forma cristata has the common names of Candelabra Plant, Crested Euphorbia, Elkhorn, and Frilled Fan. Euphorbia lactea forma cristata variegata is the variegated form.
Chenopodium and Euphorbia
The genus Euphorbia is a huge collection of plants -- many of them are commonly called spurges, but poinsettias also belong in the genus, along with many other plants with various common names.
No cacti store water, not milk. A genus of succulent called Euphorbia leak a milky latex when damaged, they look like cacti but are not. This is probably what you are thinking of. The latex produced by plants in the genus Euphorbia is a skin irritant and can cause temporary blindness. They are common in cacti collections, and are often sold as cacti.
Euphorbia haeleeleana was created in 1971.
Euphorbia herbstii was created in 1988.
Euphorbia albomarginata was created in 1857.
Euphorbia chamaesyce was created in 1753.
Euphorbia skottsbergii was created in 1936.
Euphorbia thulinii was created in 1992.
Euphorbia epithymoides was created in 1762.