Sirdavidia solannona Couvreur &amp; Sauquet, PhytoKeys 46: 4 2015
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
Sirdavidia
Sirdavidia solannona

description: Sirdavidia solannona Couvreur &amp; Sauquet, PhytoKeys 46: 4, 2015 Figs 97, 98; Map 12F Type. Gabon. Estuaire; Monts de Cristal, near first bridge after Kinguele, <i>Couvreur T.L.P. 596</i>, 15 Nov 2013: holotype: WAG[WAG0392343]; isotypes: LBV; P[P04022675]; YA; WAG[WAG0392342]. Description. Tree, 4-6 m tall, d.b.h. 2-4 cm; stilt roots or buttresses absent. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches sparsely pubescent. Leaves: petiole 3-4 mm long, 2-3 mm in diameter, sparsely pubescent to glabrous, slightly grooved, blade inserted on top of the petiole; blade 20-26 cm long, 4.5-9 cm wide, ovate to elliptic or obovate, <b>apex long acuminate, acumen 2-3 cm long</b>, base obtuse, coriaceous, below glabrous when young and old, above sparsely pubescent to glabrous when young, glabrous when old, concolorous; midrib sunken or flat, above glabrous when young and old, below sparsely pubescent when young, glabrous when old; secondary veins 9 to 12 pairs, glabrous above; tertiary venation reticulate. Individuals bisexual [possibly androdioecious], inflorescences cauliflorous or ramiflorous on young foliate or old leafless branches, axillary. Flowers with 9 perianth parts in 3 whorls, 1 to 3 per inflorescence; pedicel 2-10 mm long, densely pubescent; in fruit 8-15 mm long, diameter unknown, glabrous; bracts several basal and one upper towards the lower half of pedicel, bracts ca. 1 mm long, ca. 1 mm wide; sepals 3, valvate, free, 2-3 mm long, ca. 2 mm wide, ovate, apex acute, base truncate, pink to light red, densely pubescent outside, glabrous inside, margins flat; petals free, valvate, sub equal; outer petals 3, 4-10 mm long, 2.5-5 mm wide, elliptic, apex acute, base truncate, red, margins flat, densely pubescent outside, pubescent inside, reflexed; inner petals 3, valvate, 4-9 mm long, 2-4 mm wide, elliptic, apex acute, base truncate, pink to light red, margins flat, densely pubescent outside, pubescent at least towards margins inside, reflexed; stamens 16 to 19, in 2 to 3 rows, 3-4 mm long, linear; connective tongue shaped, glabrous, <b>bright yellow</b>; staminodes absent; <b>carpel 1</b>, ovary 4-5 mm long, stigma cylindrical to coiled, sparsely pubescent. Monocarp sessile, 1, 50-70 mm long, 15-18 mm in diameter, oblong, apex apiculate, sparsely pubescent to glabrous (pubescent when young), <b>smooth, longitudinally 4 to 6 ribbed</b>; seeds not counted, biseriate, 12-16 mm long, 6-7 mm in diameter, ellipsoid; aril absent. Distribution. Cameroon and Gabon; in Cameroon known from the Littoral region. Habitat. A rare species, only collected once in 1973 in Cameroon, but it is common in the forest understory when present (e.g. Monts de Cristal, Gabon); in lowland primary or old secondary rain forests on non-inundated soils. Altitude 100-600 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Vulnerable (VU) (Cosiaux et al. 2019a s). Uses in Cameroon. None reported. Notes. <i>Sirdavidia solannona</i> is easily distinguished by its long acuminate leaves (acumen 2-3 cm long), flowers with bright yellow stamens and small red reflexed petals, resembling the flower of a Solanaceae nor even <i>Ardisia</i> (Primulaceae) (Olivier Lachenaud, pers. com), its single carpel and thus single monocarp with 6 to 8 ribs. The androdioecious nature [flowers unisexual staminate or bisexual] of this species needs to be confirmed. We observed male and bisexual flowers in Gabon. <i>Letouzey 12405</i> suggests that male flowers are cauliflorous and hermaphrodite ones are ramiflorous, which needs to be confirmed. <i>Sirdavidia solannona</i>, the only species of the genus, was thought to be endemic to Gabon (Couvreur et al. 2015). However, after its description, a herbarium collection from Cameroon, <i>Letouzey 12405</i> was identified (dating from 1973). We returned to this same locality in 2018, but unfortunately could not locate the species. In the original description, we didn’t have access to a fruiting specimen. Here, we provide a description of the fruit (<i>Moungazi 1544, LBV</i>). Specimen examined. <b>Littoral Region</b>: near Nkak Ndjok (ca Mapubi) 30 km ENE Ed 3.83°N, 10.43°E, <i>17 December 1973</i>, <i>Letouzey R.</i> 12405 (K,P).
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 317-320, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Couvreur, TLP, Sonke, B, Niangadouma, R, Sauquet, H, 2015. Sirdavidia, an extraordinary new genus of Annonaceae from Gabon. PhytoKeys 46: 1 - 19, DOI: https://doi.org/10.3897/phytokeys.46.8937", "Cosiaux, A, Couvreur, TLP, Erkens, RHJ, 2019a. Annickia affinis. The IUCN Red List of Threatened Species: e.T132512369A132513599. https://doi.org/10.2305/IUCN.UK.2019-3.RLTS.T132512369A132513599.en"]}