Hexalobus salicifolius Engl., Monogr. Afrik. Pflanzen. - Fam. 6: 57 1901
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
Hexalobus
Hexalobus salicifolius

description: Hexalobus salicifolius Engl., Monogr. Afrik. Pflanzen.-Fam. 6: 57, 1901 Fig. 31; Map 4H Type. Cameroon. South Region; Bipindi, <i>Zenker G.A. 2268</i>, 1900: holotype: B[B 10 0154199]; isotypes: BM[BM000546383]; COI[COI00033180]; G[G00011622, G00011623]; GEOT[GOET005680]; HBG[HBG518921]; K[K000582046]; L[L 0049299]; M[M0089219]; MO <i>n.v.</i>; P[P00363369, P00363367]; S[S12-22767]; WAG[WAG0053744]; WU[WU0025889]; Z[Z-000034502]. Description. <b>Tree, up to 35 m tall</b>, d.b.h. up to 100 cm; stilt roots or buttresses absent, trunk fluted. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches densely pubescent. Leaves: petiole 1-3 mm long, 1-2 mm in diameter, sparsely pubescent, slightly grooved, blade inserted on top of the petiole; <b>blade 5-10 cm long</b>, 1.5-3.5 cm wide, elliptic, apex acuminate, acumen 0.5-1 cm long, base cuneate, coriaceous, above glabrous when young and old, above sparsely pubescent when young, sparsely pubescent when old, concolorous; midrib sunken or flat, below pubescent when young and old, below pubescent when young and old; secondary veins 5 to 12 pairs; tertiary venation reticulate. Individuals bisexual; inflorescences ramiflorous on young foliate branches, axillary. Flowers with 9 perianth parts in 3 whorls, 1 to 3 per inflorescence; pedicel 8-15 mm long, 1-2 mm in diameter, densely pubescent; in fruit 10-13 mm long, 2-3 mm in diameter, glabrous; bracts 5 to 6, several basal and two (sometimes fused) towards the upper half of pedicel, basal bracts 5 mm long, 3 mm wide; upper bracts 5 mm long, 3 mm wide; sepals 3, valvate, free, 7-11 mm long, 4-7 mm wide, ovate, apex acute, base truncate, brown, pubescent outside, densely pubescent inside, margins flat; petals basally fused, tube 2-4 mm long, purple, inner and outer whorl not differentiated, equal; lobes 17-30 mm long, 4-8 mm wide, elliptic, apex rounded, cream to yellow, margins wavy, pubescent outside, pubescent inside, plicate; stamens numerous, in 11 to 13 rows, ca. 2 mm long, elongated; connective discoid, glabrous, cream; staminodes absent; <b>carpels free, 3 to 4</b>, ovary 2-3 mm long, stigma divided into two lobes with margins coiled inwards, pubescent. Monocarps stipitate, 1-2 mm long, ca. 3 mm in diameter; monocarps 2 to 4, 60-93 mm long, 40-55 mm in diameter, ovoid to oblong, apex rounded, pubescent to glabrous, <b>verrucose</b>, rusty-brown when ripe; seeds 15 to 15 per monocarp, 22-31 mm long, 11-18 mm in diameter, flattened; aril absent. Distribution. Known from Cameroon, Gabon and the Republic of Congo (one specimen); in Cameroon known from the East, South and Central regions. Habitat. A fairly scarce species, in primary and secondary lowland and pre-montane rain forest, occasionally in semi-deciduous forests, in periodically inundated forests and on river banks. Altitude 50-900 m a.s.l. Local and common names known in Cameroon. Ooué (dial. Jaundi, <i>Hédin 1663</i> ); Owoé (dial. Yetbou, <i>Médou 1703</i> ). IUCN conservation status. Least Concern (LC) (Cosiaux et al. 2019o). Uses in Cameroon. None recorded. Notes. <i>Hexalobus salicifolius</i> is morphologically close to <i>H. crispiflorus</i> from which it is distinguished by its smaller leaves, fewer carpels (2 to 4 versus 7 to 16 in <i>H. crispiflorus</i>) and verrucose monocarps (versus smooth in <i>H. crispiflorus</i>). Specimens examined. <b>South Region</b>: South Province 15 km from Kribi, 2.96°N, 9.933°E, <i>28 August 1970</i>, <i>Bos J.J.</i> s.n. (WAG[WAG0162941]); Campakok (Camp Akok), 2.65°N, 9.9°E, <i>30 October 1991</i>, <i>Hallé F.</i> 4181 (WAG); Colline près Mezese à 17 km ENE de Sangméli 2.95°N, 12.14°E, <i>19 October 1966</i>, <i>Letouzey R.</i> 8122 (BR,P,YA); Bidou, 2.85°N, 9.991°E, <i>28 May 1954</i>, <i>Médou J. SRFK</i> 1703 (P,YA); 22 km NE of Kribi Kribi-Bipindi road Bidou I cultivated fields NE of village, 3.00°N, 10.09°E, <i>04 June 2006</i>, <i>van Velzen R.</i> 98 (WAG); 26 km N of Kribi SE of the toll post for Kribi-Edéa road forest at Bebamboue II, 3.05°N, 9.987°E, <i>26 May 2006</i>, <i>van Velzen R.</i> 99 (WAG); Bipindi, 3.08°N, 10.42°E, <i>01 January 1900</i>, <i>Zenker G.A.</i> 2268 (COI,G,G,K,L,M,MO,P,S,WAG); Bipindi, 3.08°N, 10.42°E, <i>01 January 1907</i>, <i>Zenker G.A.</i> 3330 (BR,G,UPS).
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 128-129, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Cosiaux, A, Couvreur, TLP, Erkens, RHJ, 2019o. Hexalobus salicifolius. The IUCN Red List of Threatened Species: e.T32927A132520473. https://doi.org/10.2305/IUCN.UK.2019-3.RLTS.T32927A132520473.en"]}