Amaryllis Equestris (Linn.
Amaryllis Belladonna L.
Augustin De Candolle wrote the descriptions for the first four volumes of Redouté's
Les Liliacées. Regarding Amaryllis equestris he wrote "This
plant has long been confused with Amaryllis belladonna; it indeed appears that
this species which we are describing now is the one which should be allotted the
nickname 'Belladonna,' which was first assigned to another plant, and which is
retained out of respect for the received nomenclature." (translation provided
by Brent Dickerson)
De Candolle was apparently referring to the Donna bella of Ferrari (1638)
as being the species to which the name Belladonna was first assigned, since
Hermann first recorded the name Belladonna for the American plant in 1689.
Nevertheless, Redoute's portrait of Amaryllis equestre agrees with
Amaryllis Belladonna L. (1753), which was named for Hermann's
Linn. fil. distinguished Amaryllis reginae by its shorter tube, a feature
Linnaeus did not mention. Rather, Linnaeus distinguished the latter species
by the petals which were not recurved at the base.