Lip, either of the two divisions of a bilabiate corolla or calyx; in orchids the upper petal (often, apparently, the lower) usually very different from the others.
Lobe, any division of a leaf, corolla, etc., especially if rounded.
Lunate, crescent-shaped, or half-moon-shaped.
Lyrate, lyre-shaped; pinnatifid with the terminal lobe large and rounded, and one or more of the lower pairs small.
Membranaceous, thin; rather soft and translucent, like membrane.
Monœcious, with stamens and pistils in separate blossoms on the same plant.
Mucronate, with a short, abrupt, small tip.
Nectar, the sweetish secretion of the blossom from which bees make honey.
Nectary, the place or gland in which nectar is secreted.
Nerve, a simple, unbranched vein or slender rib.