Monanthotaxis tripetala P. H. Hoekstra, PhytoKeys 69: 96 2016
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 tripetala

description: Monanthotaxis tripetala P.H.Hoekstra, PhytoKeys 69: 96, 2016 Figs 70, 71; Map 9C Type. Cameroon. East Region; 15 km E of Dimako, village halfway Bertoua-Doumé, <i>Leeuwenberg A.J.M. 5828</i>, 11 Jun 1965: holotype: WAG [WAG0110801, WAG0110802]; isotypes: B[B100190273]; BR[BR0000014126253]; C; EA; K; LISC; MO; P[P01967268]; PRE; YA. Description. Liana, 3 m tall, d.b.h. to 11 cm. Indumentum of simple hairs; old leafless branches glabrescent, young foliate branches pubescent with very short appressed reddish brown hairs 0.1 mm long. Leaves: petiole 2-8 mm long, 1-2 mm in diameter, pubescent, blade inserted on the side of the petiole; blade 4.2-16.2 cm long, 1.8-5.3 cm wide, oblong to elliptic, apex acuminate to acute, acumen 0.5-1 cm long, base rounded, subcoriaceous, below sparsely pubescent when young, glabrous when old, above sparsely pubescent to glabrous when young and old, discolorous, whitish below; midrib impressed, above sparsely pubescent when young, glabrous when old, below pubescent when young, sparsely pubescent when old; secondary veins 7 to 10 pairs, glabrous above; tertiary venation percurrent <b>. Individuals bisexual; inflorescences ramiflorous on old leafless branches, axillary.</b> Flowers with 6 to 7 perianth parts in 2 to 3 whorls, 1 to 2 per inflorescence, peduncle 0-6 mm long, pubescent; pedicel 12-20 mm long, 0.5 mm in diameter, pubescent; in fruit 16-29 mm long, ca. 2 mm in diameter; basal bract not seen; upper bracts ca. 1 mm long, ca. 0.5 mm wide; sepals 3, valvate, free, ca. 1 mm long, ca. 1 mm wide, ovate, apex obtuse, base truncate, densely pubescent outside, glabrous inside, margins flat; petals free, outer petals longer than inner (when present), inner petals entirely covered in bud; <b>outer petals 3, 2-2.2 mm long</b>, ca. 2.2 mm wide, broadly ovate to circular, apex rounded to obtuse, base truncate, margins flat, pubescent outside, pubescent inside; <b>inner petals absent or more rarely 1 minute, ca. 1.5 mm long</b>, ca. 0.5-0.6 mm wide, elliptic, apex acute, base truncate, margins flat, pubescent outside, pubescent and glabrous towards the base inside; stamens 9 to 12, in 1 row, ca. 1 mm long, linear to clavate; connective reduced, slightly acute, glabrous; staminodes absent; carpels free, 9, ovary ca. 1 mm long, stigma flat, glabrous. Monocarps stipitate, stipes 7-22 mm long, ca. 2 mm in diameter; monocarps up to 7, 110-130 mm long, 8-9 mm in diameter, moniliform, ellipsoid, apex apiculate, sparsely pubescent to glabrous, verrucose, constricted around seeds when more than 1, yellow when ripe; seeds 1 to 4 per monocarp, ca. 17 mm long, ca. 7 mm in diameter, ellipsoid; aril absent. Distribution. A Central African species, from Cameroon to Gabon, in Cameroon known from the East region. Habitat. A rare species, known from a single collection in Cameroon; in lowland primary or secondary rain forests, on hillsides. Altitude ~650 m a.s.l. Local and common names known in Cameroon. None recorded. Preliminary IUCN conservation status. Endangered (EN) (Hoekstra et al. 2021). Uses in Cameroon. None reported. Notes. <i>Monanthotaxis tripetala</i> is distinguished by the small axillary bisexual flowers, of which the inner petals are highly reduced or absent. The latter character also occurs in the male flowers of <i>Monanthotaxis cauliflora</i> and <i>M. diclina</i>, but those have unisexual flowers.
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 236-238, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["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"]}