1	Corolla to 20 mm in diameter; anthers more than 3 mm long (rarely slightly less); fruiting pedicels 15–17 mm long, strongly deflexed; cloud forests	S. macrotonum
–	Corolla always less than 20 mm in diameter; anthers 1.5–2.7 mm long; fruiting pedicels usually less than 15 mm, deflexed (not strongly so) or spreading; many habitat types	2
2	Anthers 1.2–1.5 mm long, almost globose; berry very shiny; widespread	S. americanum
–	Anthers more than 2 mm long, ellipsoid; berry matte or somewhat shiny, not very shiny; southeastern United States of America and the Caribbean	3
3	Stone cells absent in mature berries; calyx lobes obovate; styles exserted to 2.5 mm beyond the anther cone at anthesis; coastal dunes in southeastern United States of America	S. pseudogracile
–	Stone cells (2)6–8 (or more) in each mature berry; calyx lobes deltate to broadly deltate; style exserted ca. 1 mm beyond the anther cone at anthesis; many forest and open habitats throughout the Caribbean	S. nigrescens