Monanthotaxis congoensis Baill., Bull. Soc. Linn, Paris 2: 879 1890
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
Monanthotaxis
Monanthotaxis congoensis

description: Monanthotaxis congoensis Baill., Bull. Soc. Linn, Paris 2: 879, 1890 Figs 49, 50; Map 6H Type. Gabon. no region; Ogooué, <i>Thollon F.-R. 813</i>, Jul 1887: lectotype, chosen by Le Thomas (1969b), p. 258: P[P00362762, P00362763, P00362766]; isolectotypes: K[K000198992]; MA[MA630761, MA698356]; WAG[WAG0003586, WAG0003587]. Description. Shrub to liana, 2-5 m tall, d.b.h. unknown. Indumentum of simple hairs; old leafless branches glabrescent, young foliate branches densely pubescent with appressed pale brown hairs 0.7-1.2 mm long. Leaves: petiole 3-ca. 8 mm long, ca. 1 mm in diameter, densely pubescent, grooved, blade inserted on top of the petiole; blade 7.5-25 cm long, 1.9-6 cm wide, oblong to oblanceolate or elliptic, apex acuminate to acute, acumen ca. 1.5 cm long, base cuneate to cordate, papyraceous, <b>below densely pubescent with appressed silky white hairs when young</b>, sparsely pubescent when old, above sparsely pubescent to glabrous when young, glabrous when old, discolorous, whitish below; midrib sunken or flat, above densely pubescent when young and old, below densely pubescent when young and old; secondary veins 9 to 16 pairs, pubescent above; tertiary venation percurrent. Individuals bisexual; inflorescences ramiflorous on old leafless branches, terminal or leaf opposed. Flowers with 9 perianth parts in 2 whorls, 4 to 10 per inflorescence, <b>in 6-13 cm long racemes</b>; pedicel up to ca. 12 mm long, ca. 1 mm in diameter, sparsely pubescent to densely pubescent; in fruit same as in flower; basal bract 2-3 mm long, ca. 1 mm wide; upper bract ca. 1 mm long, ca. 1 mm wide; sepals 3, valvate, basally fused, 1-3 mm long, 1-2 mm wide, triangular to ovate, apex acute, base truncate, densely pubescent outside, pubescent inside, margins flat; <b>petals free, 6, in one whorl</b>, 3-4 mm long, 1-2 mm wide, elliptic to ovate, apex obtuse, base truncate, green to light yellow, margins flat, densely pubescent outside, pubescent inside; stamens 6, in 1 row, opposite with the petals, ca. 1 mm long, obconic; connective truncate, glabrous; staminodes 6, alternating with stamens, ca. 1 mm long; carpels free, 15 to 21, ovary ca. 1 mm long, stigma bilobed, glabrous. Monocarps stipitate, stipes 2-3 mm long, 2-3 mm in diameter; monocarps up to 4, 12-15 mm long, 9-10 mm in diameter, <b>ellipsoid to subglobose</b>, apex rounded, densely pubescent, smooth, dull orange to red when ripe; <b>seed 1 per monocarp</b>; 8-9 mm long, 7-8 mm in diameter, ellipsoid; aril absent. Distribution. A central African species, in Cameroon and Gabon; in Cameroon known from the Littoral, South and South-West regions. Habitat. A uncommon species when present, in primary and old secondary rain forest, periodically inundated rain forests, gallery forests or forest edges, on rocky soil. Altitude 50-700 m a.s.l. Local and common names known in Cameroon. None recorded. Preliminary IUCN conservation status. Least Concern (LC) (Hoekstra et al. 2021). Uses in Cameroon. None recorded. Notes. <i>Monanthotaxis congoensis</i> is distinguished by its densely pubescent lower leaf surface with appressed silky white hairs and its raceme-like inflorescences. Specimens examined. <b>Littoral Region</b>: Ebo Wildlife Reserve Djuma permanent camp On east trail, 4.36°N, 10.25°E, <i>15 February 2013</i>, <i>Couvreur T.L.P.</i> 626 (WAG,YA). <b>South-West Region</b>: Etinde Upper Boando footpath to west of village, 4.05°N, 9.15°E, <i>06 December 1993</i>, <i>Cable S.</i> 404 (K); Bayang Mbo Wildlife Sanctuary after Mbu river, 5.35°N, 9.501°E, <i>26 March 2016</i>, <i>Couvreur T.L.P.</i> 1018 (WAG,YA); on trail leading to top of Mt Etinde after Ekonjo village, 4.06°N, 9.151°E, <i>01 April 2016</i>, <i>Couvreur T.L.P.</i> 1025 (WAG,YA); Mokoko Forest Reserve Dikome, 4.48°N, 9.033°E, <i>05 May 1994</i>, <i>Ekema S.N.</i> 939 (K,YA); Banyang-mbo Sanctuary, 5.35°N, 9.541°E, <i>02 December 2000</i>, <i>Gosline W.G.</i> 300 (K); district Buea Upper Boando, 4.03°N, 9.106°E, <i>27 March 1992</i>, <i>Kwangue A.T.</i> 22 (K,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 180-182, 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", "Hoekstra, PH, Wieringa, JJ, Maas, JM, Chatrou, LW, 2021. Revision of the African species of Monanthotaxis (Annonaceae). Blumea 66: 107 - 221, DOI: https://doi.org/10.3767/blumea.2021.66.02.01"]}