Polyceratocarpus pellegrinii Le Thomas, Adansonia ser. 2, 5: 451 1965
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 pellegrinii

description: Polyceratocarpus pellegrinii Le Thomas, Adansonia sér. 2, 5: 451, 1965 Figs 95, 96; Map 12E Type. Gabon. Ogooué-Lolo; Poungui, <i>Le Testu G.M.P.C. 7754</i>, 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; <b>midrib raised above</b>, 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, <b>20-25 mm long</b>, 5-7 mm wide, oblong to elliptic, apex acute, base truncate, <b>yellow</b>, 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, <b>yellow</b>, 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, <b>50-110 mm long, 20-30 mm in diameter, oblong</b>, apex rounded, glabrous, <b>irregularly and transversally ribbed</b>, 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. <i>Polyceratocarpus pellegrinii</i> is distinguished by its conspicuous raised midrib unique within the genus, and yellow flowers (versus white in <i>P. parviflorus</i>, color of <i>P. microtrichus</i> unknown). Le Thomas (1969b) indicates that the fruits are unknown but they have since been collected (e.g. <i>Couvreur 575</i> from Gabon) and are here described. Specimens examined. <b>Littoral Region</b>: Mapubi 30 km before Edea on Yaoundé-Edea road On forestry road 5 km direction to Sanaga river, 3.84°N, 10.38°E, <i>28 February 2018</i>, <i>Couvreur T.L.P.</i> 1178 (MPU,WAG). <b>South Region</b>: 20 km From Kribi N of Lolodorf road (SFIA logging road), 3.01°N, 10.05°E, <i>15 July 1969</i>, <i>Bos J.J.</i> 5049 (WAG); Ongongondjé Hill (Ambam), 2.38°N, 11.28°E, <i>27 December 1975</i>, <i>de Wilde J.J.F.E</i> 8718 (BR,K,MO,P,U,WAG,YA); Colline au SE de Ndengué 15 km S d’Ebolowa, 2.78°N, 11.12°E, <i>26 March 1970</i>, <i>Letouzey R.</i> 10248 (P,YA).
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 316-317, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Le Thomas, A, 1969b. Annonacees. In: Aubreville, A, Ed., Flore du Gabon. Museum National d'Histoire Naturelle, Paris: 1 - 371"]}