Thaumatococcus flavus A. C. Ley, 2012

Ley, Alexandra C. & Classen-Bockhoff, Regine, 2012, Five new species of Marantaceae endemic to Gabon, Adansonia (3) 34 (1), pp. 37-52 : 44

publication ID

https://doi.org/ 10.5252/a2012n1a4

DOI

https://doi.org/10.5281/zenodo.5205859

persistent identifier

https://treatment.plazi.org/id/E6568786-401B-E24D-FF0C-FC1592749D8D

treatment provided by

Carolina

scientific name

Thaumatococcus flavus A. C. Ley
status

sp. nov.

Thaumatococcus flavus A. C. Ley , sp. nov.

( Figs 1 View FIG ; 6 View FIG )

Thaumatocco daniellii similis sed inflorescentiae rhachidi fusca, bracteis floribusque, flavis bracteis pubescentibus, fructu juveni fusco cum verrucis, maturo rubro praecipue differt. TYPUS. — Gabon. Monts de Cristal, Tchimbele, in primary forest below the hydroelectrical station near the esplanade, 0°36.855’N, 10°24.159’E, 14.XI.2004, A. C. Ley 56 (holo- WAG!; iso- LBV!) GoogleMaps .

PARATYPI. — Gabon. Monts de Cristal , Tchimbele, in the closed forest below the hydroelectrical station near the esplanade, 0°36.855’N, 10°24.159’E, 10.XII.2005, A. C. Ley 201, 202 ( LBV, WAG) GoogleMaps . — Forest below airstrip towards the river, 0°37’30.6”N, 10°23’51.8”E, 13.XII.2006, A. C. Ley 218 ( LBV, WAG) GoogleMaps . — Mikongo , 0°35.815’N, 11°12.413’E, 19.XI.2008, A. C. Ley 457 ( BRLU, LBV) GoogleMaps . HABITAT AND DISTRIBUTION. — Primary forest along streams at around 500 m in Monts de Cristal in Gabon (Fig. 3) .

DESCRIPTION Rhizomatous herb, up to 2.5 m tall, forming clusters. Leaves arising solitary from rhizome; shoot base with sheaths of up to 20 cm in length, glabrous; petiole up to 2.5 m long, green, glabrous; pulvinus 10 cm long,glabrous; leaf lamina almost round, only slightly asymmetric,up to 40 × 30 cm, with a short broad tip, almost equally light green on both sides, pronounced parallel veins. Inflorescence arising from rhizome, up to 20 cm long, 2-3 partial inflorescences; peduncle 10 cm long with 2-4 sterile yellow bracts at the base of each branch; inflorescence axis brown, pubescent; internodes 3 cm at the base, 0.8 cm at the tip, long hairs around nodes; fertile bracts up to about 14 per partial inflorescence, yellow, about 22 mm long, pubescent; only one flower pair per bract; prophyll missing; axis of flower pair 1 mm, glabrous;pedicelles 0.5 and 1 mm long, glabrous, bearing one bracteole each, 1.5 × 0.9 mm, brown. Flower yellow, 2.5 cm long;sepals 12 × 3 mm; petals 28× 7 mm folded backwards; corolla tube about 15 mm; outer staminodes mostly absent, about 23 cm long; cucullate staminode about 25 mm long;callose staminode 24 mm; stamen 3 mm; petaloid appendage about 25 mm long; style about 30 mm long; ovary 3 × 2.5 mm, yellow/brown, pubescent.Fruit first brown then red at maturity, triangular, fleshy, surface verrucous, about 3.5 × 4 cm. Seeds white, 1.5 cm long.

REMARKS

Thaumatococcus flavus A.C. Ley , sp. nov. differs from the only other species in the genus, Thaumatococcus daniellii Benth. , in the colour of the inflorescence, bracts and flowers, the surface structure of the fruit and its restricted distribution range in the mountainous area of Monts de Cristal.

WAG

Wageningen University

LBV

CENAREST

BRLU

Université Libre de Bruxelles