What is "pleiocarpa"

Pleiocarpa is a genus of plant in the Apocynaceae family first described as a genus in 1876. It is native to tropical Africa from Senegal to Tanzania and south to Zimbabwe. the World Checklist of Selected Plant Families recognises 6 species:

Species

1. Pleiocarpa bicarpellata Stapf - Cabinda, Cameroon, Republic of Congo, Gabon, Zaire, Kenya
2. Pleiocarpa brevistyla Omino - Gabon
3. Pleiocarpa mutica Benth. - Ghana, Ivory Coast, Liberia, Sierra Leone, Nigeria, Cameroon, Gabon, Central African Republic, Republic of Congo
4. Pleiocarpa picralimoides ( Pichon) Omino - Cabinda, Republic of Congo, Gabon
5. Pleiocarpa pycnantha ( K.Schum) Stapf - widespread across most of tropical Africa
6. Pleiocarpa rostrata Benth. - Nigeria, Cameroon, Gabon

formerly included in genus

1. Pleiocarpa camerunensis (K.Schum. ex Hallier f.) Stapf = Hunteria camerunensis K.Schum. ex Hallier f.
2. Pleiocarpa hockii De Wild. - Acokanthera oppositifolia (Lam.) Codd
3. Pleiocarpa simii (Stapf) Stapf ex Hutch. & Dalziel = Hunteria simii (Stapf) H.Huber