Mischogyne gabonensis Gosline, Kew Bull. 74 (2) - 28: 13 2019
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
Mischogyne
Mischogyne gabonensis

description: Mischogyne gabonensis (Pellegr. ex Le Thomas) Gosline, Kew Bull. 74(2)-28: 13, 2019 Fig. 45; Map 6C ≡ Mischogyne elliotiana (Engl. &amp; Diels) Le Thomas var. gabonensis Pellegr. ex Le Thomas, Flore du Gabon 16: 291, 1969. Type. Gabon. Nyanga; Mayumba, <i>Le Testu G.M.P.C. 1768, 26 Aug</i> 1914: lectotype, designated by Gosline et al. (2018), p. 28 [P00315820]; isolectotypes BM[BM000547338]; BR[BR0000008801661, BR0000008802330]; LISC[LISC000379]; P[P00315817, P00315818]; WAG[WAG0175098, WAG0175099, WAG0247284, WAG0247285, WAG0247286]. Description. Tree, 3-25 m tall, d.b.h. up to 25 cm; stilt roots or buttresses absent. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches shortly pubescent. Leaves: petiole 5-10 mm long, ca. 2 mm in diameter, sparsely pubescent to glabrous, cylindrical, blade inserted on the side of the petiole; blade 8-16 cm long, 4-7 cm wide, obovate, apex acuminate, acumen 1-3 cm long, base cuneate, papyraceous to subcoriaceous, below glabrous when young and old, above glabrous when young and old, concolorous; midrib impressed, above glabrous when young and old, below glabrous when young and old; secondary veins 6 to 9 pairs, glabrous above; tertiary venation reticulate. Individuals bisexual; inflorescences ramiflorous on old or young foliate branches, extra-axillary. Flowers with 9 perianth parts in 3 whorls, 1 per inflorescence; pedicel 5-12 mm long, 0.5-1 mm in diameter, pubescent; in fruit 7-15 mm long, 2-3 mm in diameter, glabrous; bracts few, reduced to a tuff of hairs, all basal; <b>sepals, valvate, completely fused in bud, tearing at anthesis into 2 or 3 parts</b>, 7-13 mm long, 3-5 mm wide, triangular, apex acute, base truncate, green, tomentose on both sides, margins flat; petals free, equal; outer petals 3, valvate, 14-16 mm long, 3-5 mm wide, narrowly elliptic, apex acute, base truncate, bright white, margins flat, densely pubescent outside, tomentose inside; inner petals 3, valvate, 14-16 mm long, 3-5 mm wide, narrowly elliptic, apex acute, base truncate, bright white, margins flat, densely pubescent outside, tomentose inside; stamens 50 to 60, in 3 to 4 rows, 1-3 mm long, elongated; <b>connective tongue shaped, pubescent</b>, cream; staminodes absent; <b>carpels free, 3-7</b>, ovary 5-6 mm long, stigma bilobed, densely pubescent. Monocarps sessile, 1 to 3, 60-65 mm long, 28-32 mm in diameter, cylindrical, apex rounded, glabrous, smooth, 1-ribbed, yellow when ripe; seeds 6 per monocarp, ca. 20 mm long, ca. 15 mm in diameter, ellipsoid, <b>covered with an indumentum of fine white hairs</b>; aril absent. Distribution. Cameroon, Gabon and Bioko island (Equatorial Guinea); in Cameroon known from the South and South-West regions. Habitat. A rare species in Cameroon (or at least uncommonly collected); in lowland primary or old secondary rain forests. Altitude 0-500 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Endangered (EN) (Texier and Stévart 2021a). Uses in Cameroon. None reported. Notes. <i>Mischogyne gabonensis</i> is morphologically similar to the West African endemic <i>M. elliotiana</i> (of which it was formerly regarded as a variety) in the shape and size of its flowers and monocarps (Gosline et al. 2018). However, <i>M. gabonensis</i> is a large tree up to 25 m tall and 25 cm in d.b.h. with sepals completely fused and tearing at anthesis and has 3-7 carpels, whereas <i>M. elliotiana</i> is a smaller tree or shrub 3-10 m tall, with 3 sepals that are free with reduplicate-valvate margins, and 7-12 carpels. Specimens examined. <b>South Region</b>: Environs de Nko’olong 30 km E Campo, 2.40°N, 10.03°E, <i>21 November 1992</i>, <i>Satabié B.</i> 978 (YA). <b>South-West Region</b>: Mount Cameroon National Park Bakinguili trail above Bakinguili village, 4.09°N, 9.054°E, <i>02 April 2016</i>, <i>Couvreur T.L.P.</i> 1033 (WAG,YA); Fako Njonji Njonji along path to the lake Low canal forest, 4.15°N, 9.066°E, <i>26 September 2001</i>, <i>Kenfack D.</i> 1545 (MO).
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 163-165, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Gosline, G, Marshall, AR, Larridon, I, 2018. Revision and new species of the African genus Mischogyne (Annonaceae). Kew Bulletin 74: e28. https://doi.org/10.1007/s12225-019-9804-7", "Texier, N, Stevart, T, 2021a. Mischogyne gabonensis. The IUCN Red List of Threatened Species: e.T173338600A174512860. https://doi.org/10.2305/IUCN.UK.2021-3.RLTS.T173338600A174512860.en"]}