S. grandis

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