Maerua, Forssk. (Forsskal, 1775

Abreu, J. A., Martins, E. S. & Catarino, L., 2014, New species of Maerua (Capparaceae) from Angola, Blumea 59 (1), pp. 19-25 : 23-25

KEY TO ANGOLAN MAERUA

1. Petals absent or (0–3–)4 petals very short, up to 3 mm long............................................. 2

1. Petals present, 3.5 mm or longer.................. 4

2. Gynophore 35–40 mm. Stamens 40–60. Leaves smoothly papyraceous, petiole 5–30 mm long.................................... M. angolensis subsp. angolensis

2. Gynophore up to 30 mm. Stamens 15–27. Leaves leathery, coriaceous, petiole 0.5–1.5 mm, rarely up to 3 mm .... 3

3. Leaves and petioles entirely without hairs or papillae; plant glabrous.............................. M. buxifolia

3. Leaves differentially pubescent, sparsely to densely papillose; petioles never glabrous, even in the most glabrescent forms............................... M. parvifolia

4. Sepals up to 11 mm long. Gynophore 8–10 mm long. Receptacle 1.9–2.6 mm wide at the mouth M. pintobastoae

4. Sepals ≥ 16 mm long. Gynophore ≥ 19 mm long. Receptacle 2.2–4.1 mm wide at the mouth.................... 5

5. Ovary ovoid-oblong, 2.4–5.0 mm long. Receptacle infundibular, 5–8 by 3–4 mm, faintly ribbed. Leaves with 4–7 lateral veins united to a submarginal vein on each side......................... M. juncea subsp. juncea

5. Ovary linear, rarely ellipsoidal, 5–7.9 mm long. Receptacle campanulate to tubular, rarely infundibular, 3.5–6 by 2.2–4.1 mm. Leaves occasionally with 1–2 inconspicuous veins on each side and a marginal vein........... M. mendesii