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Dyer, Fl. trop. Afr. 4(1): 99 (1902). |
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Apocynaceae |
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Pleiocarpa flavescens Stapf (1902), Pleiocarpa micrantha Stapf (1902). |
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Pleiocarpa pycnantha is widespread from Senegal east to Kenya, and south to Angola and Mozambique. |
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The wood is used for local construction, combs, plane-blocks, implement handles and pestles, and also for carving, e.g. to make pipe-stems in Uganda. Ground roots mixed with seeds of Aframomum melegueta K.Schum. and palm wine are taken as a laxative. In Benin a leaf maceration with lemon juice is administered to patients suffering from jaundice, oedema, reduced urine excretion and infection by roundworms. |
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The wood is yellow to brown, hard and durable. Some indole alkaloids have been isolated from Pleiocarpa pycnantha roots and bark, e.g. pycnanthine, pleiocarpamine, quebrachamine and macusine B. |
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Shrub or small to medium-sized tree up to 20(–30) m tall; bole up to 50 cm in diameter; bark smooth to fissured or reticulately cracked, grey to reddish brown. Leaves opposite or in whorls of 3–5, simple and entire; stipules absent; petiole 5–20 mm long; blade narrowly elliptical to oblong, 4–22 cm × 1–8 cm, base rounded to cuneate, apex obtuse to acute or acuminate, glabrous, pinnately veined with 15–25 pairs of lateral veins. Inflorescence an axillary cluster, 1–2 cm × 1–3 cm, 10–30(–40)-flowered; bracts very small. Flowers bisexual, regular, 5-merous, very fragrant to bad-smelling; pedicel 1–3 mm long; sepals ovate or elliptical, 1–2.5(–3) mm long, free or connate at base, apex acute to rounded; corolla tube almost cylindrical, 6–10 mm × 0.5–2 mm, with a belt of hairs 1–3 mm wide inside just below the insertion of the stamens, lobes ovate to almost orbicular, 1.5–4.5(–5) mm long, apex rounded to acute, spreading, recurved later, white to yellow-orange; stamens inserted just below the top of the corolla tube, included, 1–2 mm long, anthers ovate, yellow; ovary superior, ovoid to globose, consisting of 2 separate carpels united at base by a disk-like thickening, style 4–8 mm long, pistil head ellipsoid to ovoid, 0.2–1 mm long. Fruit consisting of 2 globose to ellipsoid follicles 13–23(–30) mm long, apex pointed to rounded, yellow to orange, smooth to slightly rough, 2-seeded. Seeds ellipsoid to oblong, 6.5–13.5 mm long, brown. Pleiocarpa comprises about 5 species and is confined to mainland tropical Africa. It is related to Hunteria and Picralima. Pleiocarpa pycnantha can be found flowering and fruiting throughout the year. |
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Pleiocarpa pycnantha occurs in the understorey of rainforest, gallery forest and montane forest, up to 2300 m altitude. It can also be found in disturbed forest. |
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As Pleiocarpa pycnantha is widespread and occurs in various forest types, there is no reason to consider it threatened by genetic erosion. |
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It is unlikely that Pleiocarpa pycnantha will become an economically important timber tree in the future because its size is usually too small. However, its hard and durable wood will remain useful for the construction of local houses and the production of implements, as long as natural stands of sufficient volume are available. |
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• Burkill, H.M., 1985. The useful plants of West Tropical Africa. 2nd Edition. Volume 1, Families A–D. Royal Botanic Gardens, Kew, Richmond, United Kingdom. 960 pp. • Coates Palgrave, K., 1983. Trees of southern Africa. 2nd Edition. Struik Publishers, Cape Town, South Africa. 959 pp. • Omino, E.A., 1996. A contribution to the leaf anatomy and taxonomy of Apocynaceae in Africa. Wageningen Agricultural University Papers 96–1. Wageningen Agricultural University, Wageningen, Netherlands. 178 pp. |
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• Adjanohoun, E.J., Adjakidjè, V., Ahyi, M.R.A., Aké Assi, L., Akoègninou, A., d’Almeida, J., Apovo, F., Boukef, K., Chadare, M., Cusset, G., Dramane, K., Eyme, J., Gassita, J.N., Gbaguidi, N., Goudote, E., Guinko, S., Houngnon, P., Lo, I., Keita, A., Kiniffo, H.V., Kone-Bamba, D., Musampa Nseyya, A., Saadou, M., Sodogandji, T., De Souza, S., Tchabi, A., Zinsou Dossa, C. & Zohoun, T., 1989. Contribution aux études ethnobotaniques et floristiques en République Populaire du Bénin. Agence de Coopération Culturelle et Technique, Paris, France. 895 pp. • Gorman, A.A., Dastoor, N.J., Hesse, M., von Philipsborn, W., Renner, U. & Schmid, H., 2004. Ueber die Konstitution zweier neuartiger dimerer Indolalkaloide Pycnanthin und Pleiomutinin 132. Mitteilung über Alkaloide. Helvetica Chimica Acta 52(1): 33–55. • Neuwinger, H.D., 2000. African traditional medicine: a dictionary of plant use and applications. Medpharm Scientific, Stuttgart, Germany. 589 pp. |
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Lemmens, R.H.M.J., 2006. Pleiocarpa pycnantha (K.Schum.) Stapf. [Internet] Record from PROTA4U. Louppe, D., Oteng-Amoako, A.A. & Brink, M. (Editors). PROTA (Plant Resources of Tropical Africa / Ressources végétales de l’Afrique tropicale), Wageningen, Netherlands. <http://www.prota4u.org/search.asp>. Accessed . |
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General importance | |
Geographic coverage Africa | |
Geographic coverage World | |
Ornamental use | |
Timber use | |
Medicinal use | |