Rinorea, Aublet

Key View in CoL

Below, we provide a key to the Gabonese species of Rinorea with verrucose, farinose or lamellate fruits, in addition to R. zenkeri from Cameroon. Despite the fact that species with such textured fruits do not form a natural group ( Wahlert & Ballard 2012), we have produced a key with the aim to aid identification of these species when found in fruit.

1. Leaf base cordate; inflorescence bracts 3–10 mm long, covered with long hairs up to 1 mm .............................................. 2

- Leaf base obtuse to cuneate; inflorescence bracts 1–4 mm long, glabrous or covered with short hairs <0.1 mm ............. 3

2. Inflorescence a raceme with undivided secondary ramifications; fruit lamellate .................................................... R. zenkeri

- Inflorescence a panicle with secondary ramification divided in threes; fruit verrucose .......................................................... .........................................................................................................................R. curtirama Achoundong & Bos (1999: 128)

3. Lower leaf surface without glands; inflorescence terminal ................................................................................................. 4

- Lower leaf surface covered with glands; inflorescence usually axillary ............................. R. verrucosa Chipp (1923: 293)

4. Leaves obovate, with densely dentate margins; filaments glabrous; fruits farinose or lamellate.......................................... 5

- Leaves elliptic, with coarsely dentate margins; filaments hairy; fruits verrucose .............. R. cerasifolia Brandt (1913: 118)

5. Fruits farinose; staminal tube continuous, all filaments inserted on the inner side of the staminal tube; midrib below sparsely covered with hairs ......................................................................................................................................R. dentata

- Fruits lamellate; staminal tube discontinuous, adaxial filament free, other filaments inserted on the inner side of the staminal tube; midrib below densely covered with hairs ............................................................................................. R. calcicola