Taxonomic history:
   1753: Linnaeus described this species as Valeriana celtica in Species Plantarum, 1st ed., p. 32.
   today: The current name for this species is Valeriana celtica L.

Original Latin diagnosis:
Valeriana floribus triandris, foliis ovato-oblongis obtusis integerrimis.

English translation:
Valeriana with flowers three-stamened [and[ with leaf blades ovate-oblong, obtuse, [and] entire.

English translation with commentary:

Valeriana	Valeriana
with flowers	floribus - ablative plural of third declension masculine noun flos, floris
three-stamened	triandris - ablative plural masculine of group A adjective triandrus, -a, -um; modifies floribus
[and]	[added for smoother reading]
with leaf blades	foliis - ablative plural of second declension neuter noun folium, -i
ovate-oblong,	ovato-oblongis - ovato- (combining form of group A adjective ovatus, -a, -um) + oblongis (ablative plural neuter of group A adjective oblongus, -a, -um)
obtuse,	obtusis - ablative plural neuter of group A adjective obtusus, -a, -um; modifies foliis
[and]	[added for smoother reading]
entire.	integerrimis - ablative plural neuter of group A adjective integerrimus, -a, -um; modifies foliis