Species within a genus

sol, = the sun;
-anus, = belonging to, connected with, pertaining to, used to form adjectives from nouns, particularly from geographical and personal names.
solanum, = a plant called also strychnos, nightshade.
(that deadly plant is a member of this genus).
Perhaps from solamen, soothing narcotic properties of some species.
(ld, BL, M, Le)