Lobe. Any division of an organ, especially if rounded.
Lobed. Provided with a lobe or lobes. Page [xiii.]
Lustrous. Glossy; shining.
Membranaceous. Thin and somewhat translucent.
Midrib. The central vein of a leaf or leaflet.
Monoecious. Unisexual, with staminate and pistillate flowers on the same individual.
Mucilaginous. Slimy; resembling or secreting mucilage or gum.
Mucronate. Tipped with a small, abrupt point. Page [xii.]
Naked. Lacking organs or parts which are normally present in related species or genera.
Naturalized. Said of introduced plants which are reproducing by self-sown seeds.