triquetrous leek vs Allium triquetrum

triquetrous leek and Allium triquetrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
triquetrous leek	Yes	No	No	No
Allium triquetrum	Yes	No	No	No

As nouns, triquetrous leek and Allium triquetrum are synonyms defined as:

triquetrous leek and Allium triquetrum: European leek naturalized in Great Britain; leaves are triangular

Other synonyms of triquetrous leek include three-cornered leek.

triquetrous leek (noun)	Allium triquetrum (noun)
European leek naturalized in Great Britain; leaves are triangular	European leek naturalized in Great Britain; leaves are triangular