Taxonomic history:
   1753: Linnaeus described this species as Salvia africana-caerulea in Species Plantarum, 1st ed., p. 26.
   today: The current name for this species is Salvia africana L.

original Latin diagnosis
Salvia foliis subrotundis serratis: basi truncatis dentatis.

English translation
Salvia with leaf blades nearly round in outline [and] serrate, at the base truncate [and] dentate.

English translation with commentary

Salvia	Salvia
with leaf blades	foliis - ablative plural of second declension neuter noun folium, folii
nearly round in outline,	subrotundis - ablative plural neuter of group A adjective subrotundus, -a, um; modifies foliis
[and]	[added for smoother reading]
serrate,	serratis - ablative plural neuter of group A adjective serratus, -a, -um; modifies foliis
at the base	basi - ablative singular of third declension feminine noun basis, basis
truncate	truncatis - ablative plural neuter of perfect passive participle of first conjugation verb trunco, -are, -avi, -atum; modifies foliis
[and]	[added for smoother reading]
dentate.	dentatis - ablative plural neuter of group A adjective dentatus, -a, um; modifies foliis