Polyceratocarpus microtrichus Ghesq. Ex Pellegr., Bull. Soc. Bot. France Mem: 68 1950
Creators: name: Couvreur, Thomas L. P.
name: Dagallier, Leo-Paul M. J.
name: Crozier, Francoise
name: Ghogue, Jean-Paul
name: Hoekstra, Paul H.
name: Kamdem, Narcisse G.
name: Johnson, David M.
name: Murray, Nancy A.
name: Sonke, Bonaventure
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Polyceratocarpus
Polyceratocarpus microtrichus

description: Polyceratocarpus microtrichus (Engl. &amp; Diels) Ghesq. Ex Pellegr., Bull. Soc. Bot. France Mém: 68, 1950 Figs 95, 96; Map 12C ≡ Uvaria microtricha Engl. &amp; Diels, Bot. Jahrb. Syst. 39: 473, 1907. Type. Cameroon. South Region; Bipindi, <i>Zenker G.A. 2899</i>, Mar 1904: holotype: B[B 10 0154089]; isotypes: BR[BR0000008804808]; K[K000199038]; M[M0107917]; P[P00363351]; S[S07-13391]. Description. Tree, up to 8 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 pubescent. Leaves: <b>petiole 5-8 mm long</b>, 1-2 mm in diameter, sparsely pubescent to glabrous, slightly grooved, blade inserted on the side of the petiole; blade 14-34 cm long, 3.5-8 cm wide, oblong to elliptic, apex acuminate to acute, acumen 0.5-1 cm long, base acute, coriaceous, below sparsely pubescent when young, sparsely pubescent to glabrous when old, above glabrous when young and old, discolorous, whitish below; midrib sunken or flat, above glabrous when young and old, below glabrous when young and old; secondary veins 9 to 15 pairs, glabrous above; tertiary venation intermediate. Individuals unisexual (?, only male flowers and fruits seen), inflorescences ramiflorous on young foliate or old leafless branches, axillary; flowers with 9 perianth parts in 3 whorls, 2 to 4 per inflorescence; male flowers: pedicel 6-8 mm long, 3-4 mm in diameter, tomentose; bract 2-3 mm long, ca. 1 mm wide; sepals 3, valvate, basally or entirely fused, cup shaped, ca. 4 mm long, 7-8 mm wide, triangular to ovate, apex acute, base truncate, tomentose outside, glabrous inside, margins flat; petals free, <b>subequal</b>; outer petals 3, <b>10-14 mm long</b>, 6-9 mm wide, oblong to elliptic, apex acute, base truncate, margins flat, densely pubescent outside, pubescent but glabrous towards the base inside; inner petals 3, valvate, <b>10-14 mm long</b>, 5-7 mm wide, obovate to oblong, apex acute, base truncate, margins flat, tomentose outside, pubescent inside; stamens 90 to 110, in 7 to 10 rows, 2-3 mm long, linear to clavate; connective discoid, glabrous; staminodes absent; female flowers only seen in fruit; fruiting pedicel 10-20 mm long, glabrous. Monocarps sessile, 2 to 5, 20-30 mm long, 15-25 mm in diameter, <b>obovoid</b>, apex rounded, glabrous, <b>smooth, slightly bumpy when dry, not ribbed, white when ripe</b>; seeds 10 to 14 per monocarp, 5-10 mm long, 3-4 mm in diameter, ellipsoid; aril absent. Distribution. From Cameroon to Gabon, in Cameroon known from the South and South-West regions. Habitat. A rare species in Cameroon; in premontane primary rain forests. Altitude: 100-700 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Not evaluated. Uses in Cameroon. None reported. Notes. See under <i>P. parviflorus</i>. The collection <i>Watts 627</i> was suggested to be a new species (Cable and Cheek 1998, p. 11) but having seen the specimen in K, we have identified it as <i>P. microtrichus</i>. Specimens examined. <b>South Region</b>: 20 km SE of Kribi route minière E of Mt Eléphant, 2.78°N, 10.03°E, <i>01 April 1970</i>, <i>Bos J.J.</i> 6679 (WAG); ca 45 km from Kribi ca 8 km N of Lolodorf road Forest towards Lokoundje R, 3.1°N, 10.25°E, <i>02 April 1970</i>, <i>Bos J.J.</i> 6684 (BR,K,LD,LM,MO,P,WAG,YA); Ngovayang, 3.25°N, 10.57°E, <i>08 June 2015</i>, <i>Droissart V. 1881</i> (MO); Bipindi, 3.08°N, 10.42°E, <i>01 January 1904</i>, <i>Zenker G.A.</i> 2899 (BR,L,P,WAG); Bipindi, 3.08°N, 10.42°E, <i>01 January 1907</i>, <i>Zenker G.A.</i> 3270 (L,P); Bipindi, 3.08°N, 10.42°E, <i>01 December 1913</i>, <i>Zenker G.A.</i> 478 (P,U,WAG). <b>South-West Region</b>: Mokoko Forest Reserve Dikome, 4.48°N, 9.033°E, <i>05 May 1994</i>, <i>Ekema S.N.</i> 950 (K); Mokoko Forest Reserve ca 6 km W of Mundongo, 4.43°N, 9.083°E, <i>22 March 1993</i>, <i>Watts J.</i> 627 (K).
description: Published as part of <i>Couvreur, Thomas L. P., Dagallier, Leo-Paul M. J., Crozier, Francoise, Ghogue, Jean-Paul, Hoekstra, Paul H., Kamdem, Narcisse G., Johnson, David M., Murray, Nancy A. &amp; Sonke, Bonaventure, 2022, Flora of Cameroon - Annonaceae Vol 45, pp. 1-532 in PhytoKeys 207</i> on pages 311-313, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Cable, S, Cheek, M, 1998. The plants of Mt Cameroon: a conservation checklist. Kew Publishing. Royal Botanic Gardens, Kew London", "Le Thomas, A, 1969b. Annonacees. In: Aubreville, A, Ed., Flore du Gabon. Museum National d'Histoire Naturelle, Paris: 1 - 371"]}