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Webster 1913 Edition

Adj.

[Pref.

extra-

foliaceous

(Bot.)

Away from the leaves, or inserted in a different place from them;

as,

extrafoliaceous

prickles

Loudon.

Adj.

[L. extra, on the outside, and folium, a leaf.]

In botany, growing on the outside of a leaf; as extrafoliaceous stipules.

extrafoliaceous ‎(not comparable)

(botany) Away from the leaves, or inserted in a different place from them.

extrafoliaceous prickles

(Can we find and add a quotation of Loudon to this entry?)