Uvaria angolensis Welw. ex Oliv., Fl. Trop. Afr. 1: 23, 1868

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. & Sonke, Bonaventure, 2022, Flora of Cameroon - Annonaceae Vol 45, PhytoKeys 207, pp. 1-532 : 331-334

publication ID

https://dx.doi.org/10.3897/phytokeys.207.61432

DOI

https://doi.org/10.5281/zenodo.7228607

persistent identifier

https://treatment.plazi.org/id/595F7260-799A-4ED2-A3E4-87BABE67F632

treatment provided by

PhytoKeys by Pensoft

scientific name

Uvaria angolensis Welw. ex Oliv., Fl. Trop. Afr. 1: 23, 1868
status

 

Uvaria angolensis Welw. ex Oliv., Fl. Trop. Afr. 1: 23, 1868

Figs 103 View Figure 103 , 113 View Figure 113 ; Map 13A View Map 13

= Uvaria bukobensis Engl., Pflanzenw. Ost-Afrikas C: 178, 1895. Type. Tanzania: Kagera region, Bukoba, Stuhlmann F.L. 1132, no date: lectotype, here designated: K[K000198760].

= Uvaria angolensis var. guineense Keay, Kew Bull. 8: 71, 1953. Type. Cameroon. Kunde, Mildbraed G.W.J. 9224, 3 May 1914: holotype: K[K000198772].

= Uvaria variabilis De Wild., Pl. Bequaert. I: 461, 1922. Type. Democratic Republic of the Congo. Orientale, bord de la Semliki, Lesse, Bequaert J. 4117, 7 May 1914: lectotype, sheet here designated: BR[BR0000009826274]; isotypes: BR[BR0000009826601]; K[K000198773].

Type.

Angola. Malanje; Pungo Andongo, Welwitsch F.M.J. 754, Apr 1857: lectotype, sheet here designated: LISU[LISU206054]; isotypes: B[B 10 0153065]; BM[BM000554044]; COI[COI00004859]; K[K000198826]; P[P00046766]; LISU[LISU206055] .

Description.

Liana, 2-6 m tall, d.b.h. unknown. Indumentum of mixed simple, fasciculate or stellate hairs; old leafless branches sparsely pubescent, young foliate branches densely to sparsely pubescent. Leaves: petiole 3-10 mm long, 2 mm in diameter, tomentose to very sparsely pubescent, cylindrical, blade inserted on the side of the petiole; blade 4-17 cm long, 2.5-7 cm wide, oblong to elliptic, apex acuminate, acumen 1-1.5 cm long, base rounded to subcordate, subcoriaceous, below densely to sparsely pubescent when young and old, above sparsely pubescent when young, sparsely pubescent to glabrous when old; midrib sunken or flat, above densely pubescent when young, densely to sparsely pubescent when old, below sparsely pubescent when young, densely to sparsely pubescent when old; secondary veins 6 to 12 pairs, pubescent above; tertiary venation reticulate. Individuals bisexual; inflorescences ramiflorous on young or old foliate branches, extra axillary. Flowers with 9 perianth parts in 3 whorls, 1 to 3 per inflorescence; pedicel 4-6 mm long, 1-2 mm in diameter, pubescent; in fruit 7-10 mm long, 2 mm in diameter, tomentose; bracts 2, one basal and one towards the lower half of pedicel, basal bract 1-2 mm long, 1 mm wide; upper bract 2-3 mm long, 4-5 mm wide; sepals 3, valvate, completely fused, tearing at anthesis, 5-9 mm long, 4-7 mm wide, ovate, apex truncate, base truncate, green to yellow, tomentose outside, tomentose inside, margins flat; petals free, sub equal; outer petals 3, 12-20 mm long, 8-11 mm wide, ovate to obovate, apex obtuse, base truncate, green to yellow, margins flat, pubescent outside, pubescent inside; inner petals 3, imbricate, 12-19 mm long, 8-11 mm wide, obovate to ovate, apex rounded, base truncate, green to yellow, margins flat, pubescent outside, tomentose inside; stamens 190 to 210, in 8 to 9 rows, 3-5 mm long, linear; connective tongue shaped, pubescent, yellow to orange; staminodes absent; carpels free, 25 to 35, ovary 4-5 mm long, stigma bilobed, slightly capitate, glabrous. Monocarps stipitate, stipes 8-12 mm long, 2-5 mm in diameter, inserted laterally; monocarps ca. 20, 13-40 mm long, 6-20 mm in diameter, cylindrical, apex apiculate, tomentose, smooth and slightly constricted around the seeds, brown turning red when ripe; seeds 6 to 16 per monocarp, ca. 10 mm long, 4-5 mm in diameter, ellipsoid; aril absent.

Distribution.

A widespread tropical African species, occurring from Sierra Leone to Central African Republic, Sudan and Ethiopia, and from Kenya to Zambia, one of the few Annonaceae species with such a wide continental distribution ( Couvreur et al. 2008a); in Cameroon known from the Adamaoua, Central, East, North-west, South and West regions.

Habitat.

A common species in Cameroon; mainly occurring in gallery forests in drier regions of the country but also in rain forests. Altitude 500-1400 m a.s.l.

Local and common names known in Cameroon.

None recorded.

IUCN conservation status.

Least Concern (LC) (Botanic Gardens Conservation International and IUCN SSC Global Tree Specialist Group 2019c).

Uses in Cameroon.

None reported.

Notes.

Uvaria angolensis belongs to a complex of species characterized by a calyx completely fused in bud and tearing into three distinct sepals at anthesis ( Verdcourt 1971b). In Cameroon, other species of Uvaria with that character are U. baumannii , U. chamae , and U. osmantha . These species are all quite close morphologically (although U. baumanii and U. osmantha are quite different) but can be differentiated by some distinctive characters in particular fruit shape (see Key). Uvaria angolensis is particularly close to U. versicolor (not in Cameroon), but is distinguished by the connective of the stamens being tongue shaped versus discoid in U. versicolor . Uvaria angolensis is also quite variable in its indumentum varying from densely pubescent to glabrous.

Specimens examined.

Adamaoua Region: Réserve forestière de Ngaoundéré, 7.32°N, 13.58°E, 21 July 1977, Fotius G. 2738 (P,YA); Beleldibi (35 km au SSE de Ngaoundéré), 7.32°N, 13.58°E, 22 July 1966, Letouzey R. 7486 (P,YA); Pentes NO de l’Hoséré Banyo entre 1100 et 1400 m, 6.75°N, 11.82°E, 09 June 1967, Letouzey R. 8565 (L,YA). Central Region : Yaoundé Mt Eloumden path from foot of mountain (ca 800 m) on Mendong side, 3.81°N, 11.43°E, 02 May 1996, Cheek M. 8307 (K,WAG,YA); Pentes orientales du mont Yangba (1473 m) près Nyafianga (42 km NNE de Bafia), 5.13°N, 11.35°E, 09 September 1966, Letouzey R. 7829 (P,YA); Pres Nyafianga à 46 km SW de Linté, 5.13°N, 11.35°E, 23 April 1982, Nkongmeneck B.A. 310 (P,YA). East Region : Kumbe , 6°N, 14.30°E, 01 January 1914, Mildbraed G.W.J. 9224 (COI,K). North Region : Wakwa , 7.23°N, 13.58°E, 07 October 1960, Breteler F.J. 432 (WAG); Near craterlake ' Lac Tison' ca 12 km SE of Ngaoundéré, 7.25°N, 13.58°E, 30 November 1964, de Wilde W.J.J.O 4361 (WAG). South Region : Rocher de Ako'okas 26 km southeast of Ebolowa , 2.7°N, 11.28°E, 21 February 1987, Huber H.F.J. 982 (YA). West Region : ca. 6 km NE of Bangangte, 5.15°N, 10.52°E, 11 May 1964, de Wilde J.J.F.E 2579 (B,BR,K,MO,P,WAG,YA); Mme Vilatte plantations caOca 5 km from Foumbot, 5.55°N, 10.61°E, 07 July 1972, Leeuwenberg A.J.M. 10160 (BR,K,MO,P,WAG,YA) GoogleMaps .

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Magnoliales

Family

Annonaceae

Genus

Uvaria