A Grammatical Dictionary of Botanical Latin

triplinervis,-e (adj.B), triplinervius,-a,-um (adj.A): ‘triple-nerved,’ the midrib sending off a strong nerve laterally, i.e. on each side above the base of the blade, often above the middle of the leaf; the lateral nerves are distinctly shorter than the central nerve; triple-nerved, “having three nerves; usually having a prominent nein on each side of the midrib above the base” as in a sunflower. WIII; cf. quintuplinervis,-e (adj.B); cf. trinervis,-e (adj.B), ‘tri-nerved’ where two additional nerves arise together with the central nerve but at the leaf base;

- folia alterna, integerrima, fere triplinervia, leaves alternate, very entire, almost triple-nerved.

NOTE: the connecting vowel here is -i-;

tripliformia folia [folia tripliformia (adj. B): “(obsol.) leaves resembling the triple-ribbed form” (Lindley).