''Echinopsis silvestrii'' is a species of

cactus A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Greek ...

from

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

., p. 280 It should not be confused with ''

Echinopsis chamaecereus ''Echinopsis'' is a large genus of cacti native to South America, sometimes known as hedgehog cactus, sea-urchin cactus or Easter lily cactus. One small species, ''E. chamaecereus'', is known as the peanut cactus. The 128 species range from la ...

'', formerly known as ''Chamaecereus silvestrii''.

References

silvestrii Taxa named by Carlo Luigi Spegazzini {{cactus-stub