Taxonomic history:
   1753: Linnaeus described this species as Salvia pratensis in Species Plantarum, 1st ed., p. 25.
   today: The current name for this species is Salvia pratensis L.

original Latin diagnosis
Salvia foliis cordato-oblongis crenatis: summis amplexicaulibus, verticillis subnudis, corollis galea glutinosis.

English translation
Salvia with leaf blades cordate-oblong [and] crenate, the uppermost stem-clasping; with whorls nearly naked; [and] with corollas on the galea glutinous.

English translation with commentary

Salvia	Salvia
with leaf blades	foliis - ablative plural of second declension neuter noun folium, folii
cordate-oblong,	cordato-oblongis - cordato- (combining form of group A adjective cordatus, -a, -um) + oblongis (ablative plural neuter of group A adjective oblongus, -a. -um); modifies foliis
[and]	[added for smoother reading]
crenate;	crenatis - ablative plural neuter of group A adjective crenatus, -a, -um; modifies foliis
with the uppermost	summis - superlative degree, ablative plural neuter of group A adjective superus, -a, -um; agrees with foliis
stem-clasping;	amplexicaulibus - ablative plural neuter of group B adjective amplexicaulis, -is, -e; modifies foliis
with whorls	verticillis - ablative plural of second declension masculine noun verticillus, -i
nearly naked;	subnudis - ablative plural masculine of group A adjective subnudus, -a, -um; modifies verticillis
[and]	[added for smoother reading]
with corollas	corollis - ablative plural of fist declension feminine noun corolla, -ae
on the hood	galea - ablative singular of first declension feminine noun galea, -ae
glutinous.	glutinosis - ablative plural feminine of group A adjective glutinosus, -a, -um; modifies corollis