Toussaintia hallei Le Thomas, Adansonia ser. 2, 7: 99 1967
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
Toussaintia
Toussaintia hallei

description: Toussaintia hallei Le Thomas, Adansonia sér. 2, 7: 99, 1967 Fig. 101; Map 12H Type. Gabon. Ogooué-Ivindo; Belinga, <i>Hallé N. 4189</i> , 2 Jul 1966: lectotype, sheet here designated: P[P00046762]; isotypes: P[P00046760, P00046761]. Description. <b>Liana</b>, 10-15 m tall, d.b.h. 4 cm. Indumentum of simple hairs; old leafless branches glabrous, young foliate branches tomentose. Leaves: petiole 4-7 mm long, ca. 1 mm in diameter, pubescent, grooved, blade inserted on top of the petiole; blade 5-14 cm long, 3.5-5 cm wide, oblong to elliptic, apex acuminate, acumen ca. 1 cm long, base rounded, subcoriaceous, below pubescent when young and old, above glabrous when young and old, concolorous; midrib impressed, above glabrous when young and old, below sparsely pubescent when young, glabrous when old; secondary veins 7 to 10 pairs, glabrous above; <b>tertiary venation reticulate, very dense and tight</b>. Individuals bisexual; inflorescences ramiflorous on young foliate branches, axillary. <b>Flowers with 12 to 14 perianth parts in 3 to 4 whorls</b>, 1 to 2 per inflorescence; peduncle short, ca. 2 mm long; pedicel 10-17 mm long, 1-2 mm in diameter, tomentose; <b>one large bract at the base of the inflorescence, 7-13 mm long, 5-7 mm wide, elliptic</b>; floral bracts 2 to 4, one basal and several upper towards the lower half of pedicel, basal bract 5-9 mm long, 4-7 mm wide, elliptic; upper bracts 5-8 mm long, 4-6 mm wide, elliptic; sepals 3, valvate, free, 10-18 mm long, 5-7 mm wide, elliptic to ovate, apex acute, base truncate, green, tomentose outside, glabrous inside, margins flat, slightly reflexed in bud; petals free, valvate, sub equal; petals 15-30 mm long, 5-9 mm wide, narrowly obovate, apex rounded, base truncate, greenish-yellow, streaked with red-brown, base shading into bright white, margins flat, pubescent outside, glabrous inside; staminodes absent; <b>stamens 300 to 350, in 20 to 30 rows arranged on a long conical receptacle (androgynophore)</b>, ca.1 mm long, linear; connective discoid, glabrous, yellow; carpels free, 20 to 22, ovary 4-5 mm long, stigma shortly bilobed, glabrous. Fruits unknown. Distribution. A central African species, known from Gabon, Cameroon and Republic of Congo. In Cameroon known from the East region (one collection). Habitat. A very rare species across its range. In primary rain forests. Altitude ca. 400 m a.s.l. Local and common names known in Cameroon. None recorded. IUCN conservation status. Not evaluated. Uses in Cameroon. None reported. Notes. <i>Toussaintia hallei</i> is characterized by leaves that are shiny above and have a reticulate and very dense tertiary venation. The flowers have 9 to 10 petals inserted in 2 to 3 whorls and numerous stamens inserted horizontally on a very strongly convex receptacle referred to as an androgynophore, all unusual and unique features among Cameroonian Annonaceae (Le Thomas 1967b, 1969b; Luke and Deroin 2005). This species is rarely collected and is known from a single collection in Cameroon. Specimen examined. <b>East Region</b>: ca 30 km NW of Moloundou, 2.25°N, 15.08°E, <i>07 December 1982</i>, <i>de Kruif A.P.M.</i> 871 (WAG,YA).
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 325-327, DOI: 10.3897/phytokeys.207.61432
description: {"references": ["Le Thomas, A, 1969b. Annonacees. In: Aubreville, A, Ed., Flore du Gabon. Museum National d'Histoire Naturelle, Paris: 1 - 371", "Le Thomas, A, 1967b. Presence du genre Toussaintia (Annonacee) au Gabon. Adansonia 7: 97 - 100", "Luke, Q, Deroin, T, 2005. A new Toussaintia (Annonaceae) from Tanzania. Journal of East African Natural History 94: 165-174. https://doi.org/10.2982/0012-8317(2005)94[165:ANTAFT]2.0.CO;2"]}