Uvariopsis sessiliflora Robyns &amp; Ghesq., Ann. Soc. Sci. Bruxelles, Ser. B 53: 322 1933
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
Uvariopsis
Uvariopsis sessiliflora

description: Uvariopsis sessiliflora (Mildbr. &amp; Diels) Robyns &amp; Ghesq., Ann. Soc. Sci. Bruxelles, Ser. B 53: 322, 1933 Map 16G ≡ Tetrastemma sessiliflorum Mildbr. &amp; Diels, Bot. Jahrb. Syst. 53. 440, 1915. Type. Cameroon. East Region; Bezirk Lomié, im grossen Dscha-Bogen, <i>Mildbraed G.W.J. 5239</i>, 1911: holotype: B[B 10 015312]; isotype: HBG[HBG502485]. Description. Tree, height unknown, d.b.h. unknown; stilt roots or buttresses not observed. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches densely pubescent. Leaves: petiole 2-3 mm long, 1-2 mm in diameter, glabrous, slightly grooved, blade inserted on top of the petiole; <b>blade 12-18 cm long, 4-6 cm wide</b>, elliptic to obovate, apex acute, acumen 0.5-0.8 cm long, base acute to obtuse, papyraceous, below densely pubescent when young, densely pubescent when old, above glabrous when young and old; midrib sunken or flat, above densely pubescent when young, glabrous when old, below densely pubescent when young, glabrous when old; secondary veins 10 to 11 pairs per side, glabrous above; tertiary venation reticulate. Individuals unisexual [?, only female flowers known], monoecious [?]; inflorescences cauliflorous. Flowers with 6 perianth parts in 2 whorls, <b>globose in bud</b>, 2 to 3 per inflorescence, <b>female pedicels 1-3 mm long</b>, <b>1-2 mm in diameter</b>, pubescent; in fruit unknown, bracts 2 to 3, all basal or towards the lower half of pedicel, ca. 1 mm long, ca. 1 mm wide; female sepals 2, valvate, free, 2-4 mm long, 2-4 mm wide, ovate, apex acute, base truncate, pubescent outside, glabrous inside, margins flat; female petals 4, free, 7-16 mm long, 6-8 mm wide, ovate, apex acute, base truncate, margins flat, pubescent outside, sparsely pubescent and sericeous towards margins inside; male flowers unknown; staminodes unknown; female flowers: carpels free, number unknown, ovary 2-3 mm long, stigma unknown,. <b>Monocarps stipitate, 1 seen, ca. 18 mm long</b>, ca. 13 mm in diameter, globose, apex rounded, glabrous, smooth, color unknown; seeds 3 to 4 per monocarp, ca. 8 mm long, ca. 6 mm in diameter, ellipsoid; aril absent. Distribution. endemic to Cameroon, known from the South region. Habitat. Only known from the type specimen; in primary lowland rain forests. Altitude: ca. 600 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Not evaluated (but probably Critically Endangered). Uses in Cameroon. None reported. Notes. <i>Uvariopsis sessiliflora</i> is a poorly known species, but is distinguished by its subsessile flowers (pedicel shorter than 3 mm) and globose flower buds. Subsessile flowers are also found in <i>U. citrata</i> (Couvreur and Niangadouma 2016), but this latter species has longer leaves (31-50 vs 12-18 cm) with a characteristic lemon scent (not reported by Mildbraed for <i>U. sessiliflora</i>) and conical flower buds (versus globose) The latest phylogenetic studies of <i>Uvariopsis</i> suggest that <i>U. sessiliflora</i> is conspecific with <i>U. dioica</i>, and the former name could be synonymized with the later (Dagallier et al. in prep).
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 431-432, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["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"]}