Flora of Cameroon - Annonaceae Vol 45 Author Couvreur, Thomas L. P. https://orcid.org/0000-0002-8509-6587 IRD, DIADE, Univ Montpellier, Montpellier, France & Universite de Yaounde I, Ecole Normale Superieure, Departement des Sciences Biologiques, Laboratoire de Botanique systematique et d'Ecologie, B. P. 047, Yaounde, Cameroon & Naturalis Biodiversity Center, Botany Section, Darwinweg 2, 2333 CR Leiden, Netherlands thomas.couvreur@ird.fr Author Dagallier, Leo-Paul M. J. https://orcid.org/0000-0002-3270-1544 IRD, DIADE, Univ Montpellier, Montpellier, France Author Crozier, Francoise IRD, DIADE, Univ Montpellier, Montpellier, France Author Ghogue, Jean-Paul Universite de Yaounde I, Ecole Normale Superieure, Departement des Sciences Biologiques, Laboratoire de Botanique systematique et d'Ecologie, B. P. 047, Yaounde, Cameroon & Green Connexion, Environmental Group, siege face GP Melen, a cote de l'immeuble Palais des verres. Yaounde, Cameroun Author Hoekstra, Paul H. Naturalis Biodiversity Center, Botany Section, Darwinweg 2, 2333 CR Leiden, Netherlands Author Kamdem, Narcisse G. Universite de Yaounde I, Ecole Normale Superieure, Departement des Sciences Biologiques, Laboratoire de Botanique systematique et d'Ecologie, B. P. 047, Yaounde, Cameroon Author Johnson, David M. https://orcid.org/0000-0003-2896-7419 Department of Botany-Microbiology, Ohio Wesleyan University, Delaware, OH, 43015, USA Author Murray, Nancy A. Department of Botany-Microbiology, Ohio Wesleyan University, Delaware, OH, 43015, USA Author Sonke, Bonaventure https://orcid.org/0000-0002-4310-3603 Universite de Yaounde I, Ecole Normale Superieure, Departement des Sciences Biologiques, Laboratoire de Botanique systematique et d'Ecologie, B. P. 047, Yaounde, Cameroon text PhytoKeys 2022 2022-09-20 207 1 532 http://dx.doi.org/10.3897/phytokeys.207.61432 journal article http://dx.doi.org/10.3897/phytokeys.207.61432 1314-2003-207-1 29CD4EF8FB525DBAA022DF25CDB649C9 Polyceratocarpus pellegrinii Le Thomas, Adansonia ser . 2, 5: 451, 1965 Figs 95 , 96 ; Map 12E Type . Gabon . Ogooue-Lolo ; Poungui, Le Testu G.M.P.C. 7754 , 10 Dec 1929 : lectotype , sheet here designated: P[P00363348]; isotypes: BR[BR0000008805041]; P[P00363347] . Description. Tree, 5-6 m tall, d.b.h. up to 10 cm; stilt roots or buttresses absent. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches glabrous. Leaves: petiole 5-6 mm long, 2-3 mm in diameter, pubescent, slightly grooved, blade inserted on top of the petiole; blade 13-31 cm long, 3.6-5 cm wide, oblong, apex acuminate, acumen 0.5-1 cm long, base narrowly cuneate to shortly attenuate, coriaceous, below glabrous when young and old, above glabrous when young and old, (concolorous or) discolorous, whitish below; midrib raised above , above glabrous when young and old, below glabrous when young and old; secondary veins 13 to 17 pairs, glabrous above; tertiary venation intermediate. Individuals andromonoecious, male and hermaphrodite inflorescences similar, ramiflorous on old leafless branches, axillary. Flowers with 9 perianth parts in 3 whorls, 1 to 2 per inflorescence; pedicel ca. 10 mm long, 3-4 mm in diameter, pubescent; in fruit 5-6 mm long, 5-6 mm in diameter, pubescent; bract 2-3 mm long, ca. 1 mm wide; sepals 3, valvate, basally or entirely fused, cup shaped, 3-4 mm long, ca. 6 mm wide, triangular to ovate, apex acute, base truncate, green to brown-red, densely pubescent outside, glabrous inside, margins flat; petals free, outer petals longer than inner; outer petals 3, 20-25 mm long , 5-7 mm wide, oblong to elliptic, apex acute, base truncate, yellow , margins flat, pubescent outside, glabrous inside; inner petals 3, valvate, 10-14 mm long, 6-7 mm wide, elliptic to oblong, apex acute, base truncate, yellow , margins flat, pubescent outside, pubescent inside; stamens 160 to 200, in 8 to 10 rows, 1-2 mm long, linear; connective discoid, glabrous, white; staminodes absent; carpels free, 8 to 9, ovary 3-4 mm long, stigma cylindrical, pubescent. Monocarps sessile, 5 to 7, 50-110 mm long, 20-30 mm in diameter, oblong , apex rounded, glabrous, irregularly and transversally ribbed , otherwise smooth, dark green when ripe; seeds 12 to 14 per monocarp, 15-20 mm long, ca. 10 mm in diameter, ellipsoid; aril absent. Distribution. From Cameroon to Gabon, and one collection from Democratic Republic of Congo; in Cameroon known from the Littoral and South regions. Habitat. An uncommon and rarely collected species in Cameroon; in lowland or premontane primary or old secondary rain forests. Altitude: 0-600 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Not evaluated. Uses in Cameroon. None reported. Notes. Polyceratocarpus pellegrinii is distinguished by its conspicuous raised midrib unique within the genus, and yellow flowers (versus white in P. parviflorus , color of P. microtrichus unknown). Le Thomas (1969b) indicates that the fruits are unknown but they have since been collected (e.g. Couvreur 575 from Gabon) and are here described. Specimens examined. Littoral Region : Mapubi 30 km before Edea on Yaounde-Edea road On forestry road 5 km direction to Sanaga river , 3.84°N , 10.38°E , 28 February 2018 , Couvreur T.L.P. 1178 (MPU,WAG). South Region : 20 km From Kribi N of Lolodorf road (SFIA logging road), 3.01°N , 10.05°E , 15 July 1969 , Bos J.J. 5049 (WAG); Ongongondje Hill (Ambam), 2.38°N , 11.28°E , 27 December 1975 , de Wilde J.J.F.E 8718 (BR,K,MO,P,U,WAG,YA); Colline au SE de Ndengue 15 km S d'Ebolowa , 2.78°N , 11.12°E , 26 March 1970 , Letouzey R. 10248 (P,YA) .