Monanthotaxis tripetala P.H.Hoekstra, PhytoKeys 69: 96, 2016
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publication ID |
https://dx.doi.org/10.3897/phytokeys.207.61432 |
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DOI |
https://doi.org/10.5281/zenodo.7228520 |
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persistent identifier |
https://treatment.plazi.org/id/37184784-3FA5-4D3A-E3ED-AF5B005EF164 |
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treatment provided by |
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scientific name |
Monanthotaxis tripetala P.H.Hoekstra, PhytoKeys 69: 96, 2016 |
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Monanthotaxis tripetala P.H.Hoekstra, PhytoKeys 69: 96, 2016
Figs 70 View Figure 70 , 71 View Figure 71 ; Map 9C View Map 9
Type.
Cameroon. East Region; 15 km E of Dimako , village halfway Bertoua-Doumé, Leeuwenberg A.J.M. 5828, 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. Individuals bisexual; inflorescences ramiflorous on old leafless branches, axillary. 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; outer petals 3, 2-2.2 mm long, ca. 2.2 mm wide, broadly ovate to circular, apex rounded to obtuse, base truncate, margins flat, pubescent outside, pubescent inside; inner petals absent or more rarely 1 minute, ca. 1.5 mm long, 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.
Monanthotaxis tripetala 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 Monanthotaxis cauliflora and M. diclina , but those have unisexual flowers.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.