Greenwayodendron Verdc., Adansonia ser. 2, 9: 89 1969
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
Greenwayodendron

description: Greenwayodendron Verdc., Adansonia sér. 2, 9: 89, 1969 ≡ Polyalthia sect. Afropolyalthia Engler &amp; Prantl., Leipzig, W. Engelmann.160, 1897. Type species. <i>Greenwayodendron suaveolens</i> (Engl. &amp; Diels) Verdc. Description. Trees, 7-45 m tall, d.b.h. 3-125 cm; stilt roots or buttresses absent. Indumentum of simple hairs. Leaves: petiole 2-8 mm long, 1-3 mm in diameter, blade 6.5-16.2 cm long, 2-6.7 cm wide, elliptic to oblong, apex acuminate to caudate, base cuneate to rounded, concolorous; midrib sunken or flat; secondary veins 5 to 18 pairs; tertiary venation reticulate. Individuals androdioecious; male and bisexual inflorescences similar in appearance, ramiflorous on young foliate branches, leaf opposed or extra axillary. Flowers with 9 perianth parts in 3 whorls, 1 to 4 per inflorescence; pedicel 4-6 mm long; in fruit 6-13 mm long; bracts 2, one basal and one upper, 1-2 mm long; sepals 3, valvate, free, 2-4 mm long, ovate, apex acuminate, base truncate; petals free; outer petals longer than inner; outer petals 3, valvate, 8-18 mm long, 2.3-2.6 mm wide, oblong to elliptic, apex acuminate, base rounded; inner petals 3, valvate, 8-18 mm long, 1.3-2.6 mm wide, ovate to elliptic, apex acuminate, base rounded; stamens 15 to 25, in 4 to 5 rows, ovary 1-2 mm long, elongated; connective tongue-shaped, glabrous; staminodes absent; carpels free, 10 to 20, 1-2 mm long, stigma ovoid, pubescent. Fruits apocarpous, monocarps stipitate, stipes 5-10 mm long, monocarps 2 to 8, 8-21 mm long, 7-21 mm in diameter, ellipsoid to globose, apex rounded, smooth, green turning wine red when ripe; seed 1 to 4, 3-13 mm long, 3-13 mm in diameter, ellipsoid to flattened ellipsoid; aril absent. A genus of six currently described species distributed across Africa. Two species are known from Cameroon, none endemic. Onana (2011) mentions <i>Greenwayodendron oliveri</i> (Engl.) Verdc. from Cameroon, but this is not confirmed here. The latter species is a West African endemic (Lissambou et al. 2018); several specimens from coastal Gabon previously identified as <i>G. oliveri</i> are now separated as a different species: <i>G. littorale</i> Lissambou, Dauby &amp; Couvreur (Lissambou et al. 2018, 2019). Neither species is known from Cameroon to date. Taxonomy. Lissambou et al. (2018).
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 page 110, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Onana, JM, 2011. The vascular plants of Cameroon: A taxonomic checklist with IUCN assessments. Flore du Cameroun 39. Herbier National du Cameroun, Yaounde, Cameroon", "Lissambou, B-J, Hardy, OJ, Atteke, C, Stevart, T, Dauby, G, Mbatchi, B, Sonke, B, Couvreur, TLP, 2018. Taxonomic revision of the African genus Greenwayodendron (Annonaceae). PhytoKeys 114: 55 - 93, DOI: https://doi.org/10.3897/phytokeys.114.27395", "Lissambou, B-J, Couvreur, TLP, Atteke, C, Stevart, T, Pineiro, R, Dauby, G, Monthe, FK, Ikabanga, DU, Sonke, B, M'batchi, B, Hardy, OJ, 2019. Species delimitation in the genus Greenwayodendron based on morphological and genetic markers reveals new species. TAXON 68: 442 - 454, DOI: https://doi.org/10.1002/tax.12064"]}