Isolona cooperi Hutch. &amp; Dalziel ex G. P. Cooper &amp; Record, Bull. Yale Univ. School For. No. 31: 15 1931
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
Isolona
Isolona cooperi

description: Isolona cooperi Hutch. &amp; Dalziel ex G.P.Cooper &amp; Record, Bull. Yale Univ. School For. No. 31: 15, 1931 Fig. 35; Map 5B Type. Liberia. Montserrado; near Firestone plantations, along Dukwai road, <i>Cooper G.P. 417</i>, 7 May 1929: lectotype, designated by Couvreur (2009), p. 148: GH[GH00286760]; isotypes: F[F0093217]; FHO[FHA00095994]; G[GH00286760]; K <i>n.v.</i>; NY[NY00026103]; WIS[WIS00000299MAD]. Description. Tree, 6-18 m tall, d.b.h. 20 cm; stilt roots or buttresses absent. <b>Indumentum absent</b>; old leafless branches glabrous, young foliate branches glabrous. Leaves: petiole 1-5 mm long, 2-3 mm in diameter, glabrous, grooved, <b>blade inserted on top of the petiole</b>; blade 15-29 cm long, 6-15 cm wide, oblong to obovate, apex acuminate, acumen 1-2 cm long, base cuneate to rounded, subcoriaceous, below glabrous when young and old, above glabrous when young and old, concolorous; midrib raised, above glabrous when young and old, below glabrous when young and old; secondary veins 9 to 18 pairs, glabrous below; tertiary venation reticulate. Individuals bisexual; inflorescences cauliflorous or ramiflorous on young foliate branches, axillary. Flowers with 9 perianth parts in 2 whorls, 1 to 2 per inflorescence; pedicel 14-25 mm long, 1 mm in diameter, glabrous; in fruit 16-27 mm long, 2 mm in diameter, glabrous; bracts 2 to 4, all basal, 1 mm long, 1mm wide; sepals 3, valvate, free, 2 mm long, 2 mm wide, ovate, apex rounded, base truncate, green, glabrous outside, glabrous inside, <b>margins flat</b>; petals basally fused, tube 6-11 mm long, inner and outer whorl not differentiated, equal; lobes 8-15 mm long, 4-6 mm wide, oblong, apex acute to rounded, green, margins flat, glabrous outside, glabrous inside, spreading horizontally; stamens numerous, in 3 to 4 rows, 2 mm long, broad; connective discoid, glabrous, green; staminodes absent; carpels fused into a single structure, 3 mm long, stigma capitate, glabrous. Fruit syncarpous, sessile, 30-90 mm long, <b>15-30 mm in diameter, ellipsoid, apex apiculate, glabrous</b>, <b>smooth, constricted over seeds in dried material, smooth when fresh</b>, orange with white spots when ripe; seeds not counted, 10-15 mm long, 5-10 mm in diameter, ellipsoid; aril absent. Distribution. A mainly West African species, from Liberia to Ghana, with a few specimens from Cameroon and one from Gabon; in Cameroon known from South and South-West regions. Habitat. A rare species in Cameroon; in lowland primary and secondary forests, also along rivers, on sandy soils. Altitude 0-300 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Least Concern (LC) (Cosiaux et al. 2019r). Uses in Cameroon. None reported. Notes. <i>Isolona cooperi</i> is distinguished by its completely glabrous leaves, young foliate branches and flowers and with the leaf blade inserted on top of the petiole. In addition, the flowers emit a very strong sweet scent, noticeable even in dried material. It has a smooth corolla in dried material and corolla lobes with straight margins. <i>Isolona cooperi</i> is similar to <i>I. hexaloba</i> by the shape of its flowers, but the latter differs by its blade inserted sideways to the petiole and the absence of the strong sweet scent. Finally, <i>I. cooperi</i> resembles <i>I. campanulata</i> by the shape of the fruits. Specimens examined. <b>South Region</b>: Bipindi, 3.08°N, 10.41°E, <i>01 February 1910</i>, <i>Zenker G.A.</i> s.n. (F). <b>South-West Region</b>: Korup National Park, 5.06°N, 8.855°E, <i>10 March 1998</i>, <i>Kenfack D.</i> 1063 (MO,WAG).
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 137-139, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Couvreur, TLP, 2009. Monograph of the syncarpous African genera Isolona and Monodora (Annonaceae). Systematic Botany Monographs 87: 1 - 150", "Cosiaux, A, Couvreur, TLP, Erkens, RHJ, 2019r. Isolona cooperi. The IUCN Red List of Threatened Species: e.T132677030A132678219. https://doi.org/10.2305/IUCN.UK.2019-3.RLTS.T132677030A132678219.en"]}