S. grandis may refer to: Schiffermuelleria grandis, a moth species in the genus Schiffermuelleria found in France Stypandra grandis, a rhizomatous perennial plant species in the genus Stypandra Synaphea grandis, a flowering plant species in the genus Synaphea endemic to Western Australia
Synonyms Silybura grandis, a synonym for Uropeltis smithi, a snake species found in India
See also Grandis (disambiguation)