1. It is contained in an incurved sheath, and rarely protruded from it.

2. Synonyms for Biconcave include concave, concavo-concave, depressed, hollow, sunken, indented, incurved, recessed, dented and cupped

3. Pour Battledoring whichever bivalvular husbander, she tole strummed hypergenetically an levis around-the-clock taking essay exams in order that incurved rejoiced

4. Convex to obtusely Campanulate with an incurved margin at first, rarely becoming plane, and often are umbonate or with a slight depression in the center.

5. Leaves alternate; petiolules obscure; leaflets ovate or ovate-oblong, slightly incurved, 5-10 × 2.5-4 cm, abaxially Adpressed shortly pubescent on veins, adaxially glabrous or sparsely puberulent, base obliquely rounded, asymmetric, apex acute.