Uvariastrum pierreanum Engl., Monogr. Afrik. Pflanzen. - Fam. 6: 32 1901
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
Uvariastrum
Uvariastrum pierreanum

description: Uvariastrum pierreanum Engl., Monogr. Afrik. Pflanzen.-Fam. 6: 32, 1901 Figs 117, 118; Map 14I Type. Gabon. Estuaire; Libreville, <i>Klaine T.-J. 1091</i>, Oct 1897: lectotype, designated by Le Thomas (1969b), p. 294: P[P00315822]; isolectotype: B[B1001153112]. Description. Tree to shrub, 4-25 m tall, d.b.h. 40 cm; stilt roots or buttresses absent. Indumentum of simple hairs; <b>old leafless branches glabrous, young foliate branches sparsely pubescent.</b> Leaves: petiole 2-4 mm long, 1-2 mm in diameter, sparsely pubescent to glabrous, weakly grooved adaxially, <b>blade inserted on the side</b>; blade 6-16 cm long, 2-4.5 cm wide, elliptic to obovate, apex acuminate, acumen 0.7-2 cm long, base decurrent to cuneate, papyraceous to subcoriaceous, below sparsely pubescent to glabrous when young, sparsely pubescent to glabrous when old, above sparsely pubescent to glabrous when young, sparsely pubescent to glabrous when old, concolorous; midrib sunken or flat, above glabrous when young and old, below glabrous when young and old; secondary veins 7 to 12 pairs, glabrous above; tertiary venation reticulate. Individuals bisexual; inflorescences cauliflorous or ramiflorous on young foliate or old leafless branches, axillary. Flowers with 9 perianth parts in 3 whorls, 1 to 3 per inflorescence; pedicel 15-50 mm long, 1-2 mm in diameter, sparsely pubescent to densely pubescent; in fruit 15-50 mm long, 4-6 mm in diameter, sparsely pubescent to glabrous; bract 1, basal, 6 mm long, 6 mm wide; sepals 3, reduplicate-valvate, free, 15-25 mm long, 10-20 mm wide, ovate, apex acute, base truncate, grey-green, pubescent towards margins outside, sparsely pubescent inside, margins revolute; petals free, sub equal; outer petals 3, 25-40 mm long, 10-15 mm wide, elliptic, apex acute, base narrowed, yellow to greyish yellow, margins flat, densely pubescent outside, sparsely pubescent inside; inner petals 3, valvate, 15-28 mm long, 6-15 mm wide, elliptic, apex acute, base cuneate, yellow to greyish yellow, margins flat, densely pubescent outside, sparsely pubescent inside; stamens numerous, 4-6 mm long, linear; connective elongated, pubescent, pinkish red; staminodes absent; carpels free, 5 to 10, ovary 4-6 mm long, stigma bilobed, slightly capitate, densely pubescent. Monocarps shortly stipitate to sessile, stipes 0-4 mm long, 3-5 mm in diameter; monocarps 3 to 5, 90-100 mm long, 40-50 mm in diameter, <b>ellipsoid to globose, apex rounded, pubescent</b>, velvety, <b>smooth, not ribbed</b>, light green when ripe; seed 16 to 20 per monocarp, 15-25 mm long, 1-2 mm in diameter, flattened ellipsoid; aril absent. Distribution. A widespread species with a disjunct distribution in west and central Africa, from Guinea and Liberia to Ghana, and from Nigeria to Republic of Congo, and northern Democratic Republic of Congo. In Cameroon known from the East, South, Central and South-West regions. Habitat. A fairly common species; in primary or secondary lowland rain forest or in gallery forests near savannas, on non-inundated soils or along rivers, occurring on sandy or rocky soils. Altitude 0-600 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Least Concern (LC) (Cosiaux et al. 2019a u). Uses in Cameroon. None reported. Notes. <i>Uvariastrum pierreanum</i> is characterized by a combination of light brown sepals and glabrous leaves and smooth monocarps. By the shape of its flowers and glabrous aspect, <i>U. pierreanum</i> resembles <i>U. zenkeri</i>, but the latter has large leathery leaves and its leaf blade is inserted on top instead of on the side of the petiole. In herbarium material, the sepals of <i>U. pierreanum</i> dry brown, whereas those of <i>U. zenkeri</i> dry black. Specimens examined. <b>Central Region</b>: Mefou National Park, 3.61°N, 11.58°E, <i>13 March 2004</i>, <i>Cheek M.</i> 86 (K,YA). <b>East Region</b>: 3 km west of Djembe road head Lobeke Reserve, 2.21°N, 16°E, <i>16 October 1998</i>, <i>Harris D.J.</i> 5889 (E); Lobeke Reserve Small Bai, 2.28°N, 15.71°E, <i>01 November 1998</i>, <i>Harris D.J.</i> 6135 (E); A 25 km à l’WSW de Kinsassa village situé à 65 km au NNE de Moloundou sur route de Yokadouma 2.56°N, 15.16°E, <i>09 March 1971</i>, <i>Letouzey R.</i> 10533 (HGB,P,YA); Forêt au Sud de Dimako rive droite de la rivière Mbonda, 4.26°N, 13.56°E, <i>18 January 1960</i>, <i>Letouzey R.</i> 2670 (P,YA); A 13 km SSW de Koso (village situé à 60 km au SSW de Batouri), 3.93°N, 14.17°E, <i>29 July 1963</i>, <i>Letouzey R.</i> 5529 (P,YA); Approximately 10 km N of Welele between Yokadouma and Molundu, 2.68°N, 15.36°E, <i>18 March 1987</i>, <i>Manning D.</i> 1586 (MO,P,YA); Réserve de Biosphère du Dja vers 1175 m sur la piste reliant la station de Bouamir et l’inselberg de Mbasakok, 3.18°N, 12.81°E, <i>18 May 2001</i>, <i>Senterre B.</i> 1283 (BR); Réserve de Biosphère du Dja vers 1175 m sur la piste reliant la station de Bouamir et l’inselberg de Mbasakok, 3.18°N, 12.81°E, <i>19 May 2001</i>, <i>Senterre B.</i> 1370 (BR). <b>South Region</b>: Bitye, 3.01°N, 12.35°E, <i>01 September 1922</i>, <i>Bates G.L.</i> 1764 (K); Campo Ma an National Park 5 km after main entrance, 2.35°N, 10.25°E, <i>15 February 2012</i>, <i>Couvreur T.L.P.</i> 385 (WAG,YA); 1 km from main camp near Lélé river 16 km East from Lélé village, 2.28°N, 13.32°E, <i>07 September 2013</i>, <i>Couvreur T.L.P.</i> 454 (WAG,YA); Campo Ma’an National Park 11 km on trail from Ebinanemeyong village on road 7 km from Nyabessan to Campo town, 2.49°N, 10.34°E, <i>12 February 2015</i>, <i>Couvreur T.L.P.</i> 680 (WAG,YA); Ca 30 km S of Mbalmayo, 3.29°N, 11.44°E, <i>13 February 1964</i>, <i>de Wilde J.J.F.E</i> 1904 (B,BR,K,MO,P,WAG,YA); Station de cacaoyer de N’koemvone 14 km On the road from Ebolowa to Ambam, 2.81°N, 11.13°E, <i>18 February 1975</i>, <i>de Wilde J.J.F.E</i> 7972 (B,BR,K,MO,P,U,WAG,YA); Meyo Centre, 2.55°N, 11.03°E, <i>24 March 1970</i>, <i>Letouzey R.</i> 10225 (P).
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 377-379, 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", "Cosiaux, A, Couvreur, TLP, Erkens, RHJ, 2019a. Annickia affinis. The IUCN Red List of Threatened Species: e.T132512369A132513599. https://doi.org/10.2305/IUCN.UK.2019-3.RLTS.T132512369A132513599.en"]}