Nectariferous. Producing nectar.
Node. The place upon a stem which normally bears a leaf or whorl of leaves.
Nut. A hard and indehiscent, 1-celled, 1-seeded fruit.
Nutlet. A diminutive nut.
Oblanceolate. Lanceolate, with the broadest part toward the apex. Page [xii.]
Oblique. Slanting, or with unequal sides.
Oblong. Longer than broad, with sides approximately parallel. Page [xii.]
Obovale. Ovate, with the broadest part toward the apex. Page [xii.]
Obovoid. An ovate solid with the broadest part toward the apex.
Obtuse. Blunt or rounded at the apex. Page [xii.]