Uvariodendron angustifolium R. E. Fr., Acta Horti Berg. 10: 58 1930
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
Uvariodendron
Uvariodendron angustifolium

description: Uvariodendron angustifolium (Engl. &amp; Diels) R.E.Fr., Acta Horti Berg. 10: 58, 1930 Fig. 120; Map 15B ≡ Uvaria angustifolia Engl. &amp; Diels, Notizbl. Königl. Bot. Gart. Berlin 2: 295, 1899. Type. Cameroon. South-West Region; Johann-Albrechtshöhe [Kumba], <i>Staudt A. 742a</i>, 20 Mar 1896; holotype: B[B 10 0153115]. Description. Tree to shrub, 3-12 m tall, d.b.h. unknown; stilt roots or buttresses absent. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches glabrous to pubescent. Leaves: petiole 3-7.5 mm long, 1-2 mm in diameter, glabrous to pubescent, grooved, blade inserted on top of the petiole; <b>blade 10-19.9 cm long, 3-5.8 cm wide, narrowly elliptic</b>, apex acute to acuminate, acumen 1.1-1.4 cm long, base acute to cuneate, subcoriaceous, below glabrous to pubescent at base, glabrous when old, above glabrous when young and old, <b>lemon-scented when crushed</b>; midrib sunken or flat, above glabrous when young and old, below glabrous to pubescent at base when young and old; secondary veins 8 to 14 pairs per side, tertiary venation reticulate. Individuals bisexual; inflorescences ramiflorous on old or young foliate branches, axillary. Flowers with 9 perianth parts in 3 whorls, 1 to 2 per inflorescence; <b>pedicel 0-6 mm long</b>, 2-3 mm in diameter, densely pubescent; in fruit ca. 5 mm long, ca. 3.5 mm in diameter; bracts 2 to 6, several basal and one upper towards the middle of pedicel, basal bracts 2-3 mm long, 1-3 mm wide; upper bract 6-11 mm long, 9-15 mm wide; sepals 3, valvate, basally fused, imbricate at the middle, 9-13 mm long, 9-13 mm wide, ovate, apex acuminate, base truncate, densely pubescent outside, glabrous inside, margins flat; petals free, sub equal; outer petals 3, 15-21 mm long, 9-15 mm wide, ovate, apex acuminate, base truncate, margins flat, densely pubescent outside, glabrous inside; inner petals 3, valvate, 15-22 mm long, 5-10 mm wide, ovate, apex acuminate, base truncate, margins flat, densely pubescent outside, glabrous inside; stamens 200 to 300, in 10 to 15 rows, 3-3.5 mm long, narrowly oblong; connective discoid; staminodes absent; carpels free, 7 to 30, ovary 3.5-4.5 mm long, stigma bilobed, slightly capitate, densely pubescent. Monocarps shortly stipitate, stipes 1-3 mm long, ca. 3 mm in diameter; monocarps 2 to 10, 23-40 mm long, 17-30 mm in diameter, ellipsoid to globose, yellow when ripe emitting strong lemon smell; seeds 9 to 18 per monocarp, 21-28 mm long, ca. 10 mm in diameter, ellipsoid to oblong; aril absent. Distribution. A species with a disjunct distribution in West Africa (Ghana, Ivory Coast) and Central Africa (Nigeria, Cameroon); in Cameroon, known from the South-West region. Habitat. A rare species, only collected five times in Cameroon, the last collection from 1987. In lowland primary or secondary rain forest. Altitude 200-400 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>Uvariodendron angustifolium</i> is distinguished by its narrowly elliptic and relatively small leaves (13-16 cm <i>versus</i> &gt; 16 cm) compared to the other species in Cameroon. Two collections, <i>Thomas 6087</i> &amp; <i>7018</i>, record that this species emits a strong-lemon scent from the leaves when fresh, which is also recorded in Uvariodendron molundense var. citrata Le Thomas, a variety endemic to Gabon (Le Thomas 1969b) and in <i>Uvariopsis citrata</i> Couvreur &amp; Niangadouma (Couvreur and Niangadouma 2016). Specimens examined. <b>South-West Region</b>: Between Bafia and Likoko, 4.37°N, 9.324°E, <i>05 February 1958</i>, <i>Keay R.W.J.</i> 37524 (K); Kumba, 4.63°N, 9.416°E, <i>1896</i>, <i>Staudt A.</i> 642 (K); Johann-Albrechtshöhe [Kumba] area 4.16°N, 9.2°E, <i>28 March 1896</i>, <i>Staudt A.</i> 742 (B,K); Lake Barombi Kumba, 4.64°N, 9.45°E, <i>01 April 1986</i>, <i>Thomas D.W.</i> 6087 (YA); Along the road between Konye and Bakole, 4.91°N, 9.466°E, <i>25 May 1987</i>, <i>Thomas D.W.</i> 7018 (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 385-387, 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", "Couvreur, TLP, Niangadouma, R, 2016. New species of Uvariopsis (Annonaceae) and Laccosperma (Arecaceae / Palmae) from Monts de Cristal, Gabon. PhytoKeys 68: 1 - 8, DOI: https://doi.org/10.3897/phytokeys.68.9576"]}