Uvariodendron fuscum var. fuscum

Dagallier, Leo-Paul M. J., Mbago, Frank M., Couderc, Marie, Gaudeul, Myriam, Grall, Aurelie, Loup, Caroline, Wieringa, Jan J., Sonke, Bonaventure & Couvreur, Thomas L. P., 2023, Phylogenomic inference of the African tribe Monodoreae (Annonaceae) and taxonomic revision of Dennettia, Uvariodendron and Uvariopsis, PhytoKeys 233, pp. 1-200 : 1

Uvariodendron fuscum var. fuscum

Figs 19 , 23

Description.

Young branches sparsely pubescent to glabrous. Petiole 4-16 mm long, 2-5 mm wide. Leaf lamina 160-450 mm long, 43-118 mm wide, length:width ratio (2.1) 2.8-3.9, Base acute, apex acute to acuminate, surface below glabrate when young, glabrous when old; midrib sparsely pubescent to glabrous below; secondary veins 15-24 pairs. Flower pedicel 0-5 mm long. Bracts 1 to 6, upper bract 10-25 mm long, 14-25 mm wide. Sepals 11-23 mm long, 13-26 mm wide. Outer petals 20-39 mm long, 17-26 mm wide. Inner petals 20-42 mm long, 15-26 mm wide, length:width ratio 1.3-2.1, broadly obovate to obovate. Carpels 20 to 70. Fruiting pedicel ca. 5 mm long. Monocarps (only unripe fruits seen).

Distribution.

Endemic to Lower Guinean Domain of the Guineo-Congolian Region: Cameroon, Equatorial Guinea (Bioko Island), Nigeria.

Habitat and ecology.

Submontane to mountain mature or old secondary rain forests. Altitude: 800-1400 m a.s.l.

Additional specimens examined.

Cameroon - South-West Region • A. Dahl 622 (K), trail north of Likombe village ; 4°14'N, 9°11'E; alt. 1060 m; 02 Mar. 1995 • B.-A. Nkongmeneck 891 (YA), Mt Cameroun, flanc d'Ekona Lelu, feuille IGN: 1/200 000 Buea-Douala ; 4°16'N, 9°18'E; alt. 1300 m; 14 Jan. 1985 • D.W. Thomas 4469 (K, MO, P, P, YA), forest and meadows on the gently sloping side of Mt Cameroun above small Koto village ; 4°18'N, 9°06'E; alt. 550 m; 06 Mar. 1985 • E.W.G. Kalbreyer 41 (K); 4°01'N, 9°12'E; 1877 • G.W.J. Mildbraed 10720 (K), Likomba - Pflangzung , 15-35 km NE of Victoria; 4°06'N, 9°20'E; alt. 50 m; Nov. 1928 • H. Lehmbach 178 (B), Buea ; 4°09'N, 9°14'E; alt. 1800 m; 16 Jan. 1898 • H. Lehmbach 57 (B, K), Buea 1, Buea ; 4°09'N, 9°14'E; alt. 1000 m; 26 Apr. 1897 • J.J. Wieringa 2058 (WAG); Fako, Mt Etinde (= Small Mt Cameroon), near and at summit; 4°05'N, 9°07'E; alt. 1400 m; 29 Jan. 1994 • M. Groves 122 (K, SCA, YA), trail north of Likombe Village ; 4°14'N, 9°11'E; alt. 1000 m; 21 Feb. 1995 • M.R. Cheek 5145 (K, SCA, YA), Liwenyi , on the West bank of the Onge river above the first set of rapids, that is about 1-2 hours walk inland from Enyenge ; 4°17'N, 8°58'E; alt. 50 m; 27 Oct. 1993 • P. Lane 142 (K, SCA, YA), Mt Kupé, within Permanent Sample Plot on Shrike Trail leading from Nyasoso to summit; 4°50'N, 9°40'E; alt. 1200 m; 20 Jun. 1994 • R.W.J. Keay FHI37485 (FHI, K), Kumba Distr., eastern boundary of Bambuko F.R., about 11 miles SSW. of Musome. Northern slopes of Cameroon Mt; 4°18'18.11'N, 9°11'55.75'E; alt. 1000 m; 01 Feb. 1958 • S. Cable 1353 (K, SCA, YA), path towards grassland and top of Mt Cameroon from Likombe ; 4°07'N, 9°11'E; alt. 1060 m; 22 Feb. 1995 • S. Cable 1524 (K, SCA, YA), Upper Boando , logging path that becomes trail to summit; 4°04'N, 9°09'E; alt. 900 m; 14 Mar. 1995 • S. Cable 1626 (K, YA), path to summit of Etinde from Upper Boando ; 4°04'N, 9°09'E; alt. 1000 m; 16 Mar. 1995 • S. Cable 2187 (K, YA); Ndian, Korup National Park, Ekundu Kundu, path from Ekundu-Kundu to about 1 km; 5°02'14.24'N, 8°54'58.14'E; alt. 300 m; 26 Apr. 1996 • T.D. Maitland 453 (K), Buea , above upper farm; 4°09'N, 9°14'E; alt. 1219 m; 1924 • T.D. Maitland s.n.10 (K) , Cameroon mountain, Buea ; 4°09'N, 9°14'E; alt. 975 m; 1930 • T.D. Maitland s.n.9 (K) , Cameroon mountain, Buea area; 4°09'N, 9°14'E; alt. 1219 m; 1930 • T.L.P. Couvreur 1026 (WAG, YA), on trail leading to top of Mt Etinde, after Ekonjo village ; 4°04'02.27'N, 9°09'10.16'E; alt. 749 m; 01 Apr. 2016 • T.L.P. Couvreur 1029 (MPU, WAG, YA), on trail leading to top of Mt Etinde, after Ekonjo village ; 4°04'04.83'N, 9°09'11.43'E; alt. 781 m; 01 Apr. 2016 • T.L.P. Couvreur 1040 (MPU, WAG, YA), Mt Cameroon National Park, Bakinguili trail, above Bakinguili village ; 4°05'48.05'N, 9°03'24.71'E; alt. 563 m; 02 Apr. 2016 • T.L.P. Couvreur 1046 (MPU, WAG, YA), Mt Cameroon National Park, on the Bomona trail, behind Bomona village, 10 km NW from Idenau ; 4°17'46.46'N, 9°06'06.31'E; alt. 859 m; 03 Apr. 2016 • T.L.P. Couvreur 990 (MPU, WAG, YA), slopes of Mt Cameroon, on the Bokwango trail, near Bokwango village, 4 km south west of Buea ; 4°07'25.26'N, 9°11'11.28'E; alt. 1227 m; 23 Mar. 2016 • T.L.P. Couvreur 992 (MPU, WAG, YA), slopes of Mt Cameroon, on the Bokwango trail, near Bokwango village, 4 km south west of Buea ; 4°07'27.06'N, 9°10'13.93'E; alt. 1560 m; 23 Mar. 2016 . Equatorial Guinea - Bioco (Fernando Poo) • G.W.J. Mildbraed 6428 (B), Pico Basile , Fernando Poo: Nordseite d. Pics v. Sta. Isabel oberhalb Basilé, Wald über der Kakao-Region 6-800 m, viel Allanblackia , (oberer Tropenwald ); 3°41'24.72'N, 8°51'27.72'E; alt. 800 m; 16 Aug. 1911 - Bioko Sur • W.R.Q. Luke 12203 (MA), Moeri: Camp 1 to Camp 2; 3°28'09.84'N, 8°40'06.96'E; alt. 704 m • W.R.Q. Luke 13279 (K), Hormiga Camp pt 346 to North camp pt 347; 3°20'51'N, 8°29'23.64'E; alt. 800 m; 01 Feb. 2009 . Nigeria - Cross River State • K. Schmitt 323 (MO), Cross River National Park. Oban Hills. SW facing slope ca 5 km E of Neghe; 5°15'20"N, 8°38'50"E; 07 Feb. 1995 .

Figures

Figure 19. Uvariodendron fuscum (Benth.) R. E. Fr. var. fuscum A leaf, lower side B apex of young branch with detail of petiole and leaf base, upper side, inset: detail of sparse pubescence on young branch C trunk with flower bud (top) and flower (bottom) D open flower E young fruit with unripe monocarps, one old petal remaining F flower semi-bottom view, showing bracts and sepals G detail of flower after anthesis, note the falling stamens and pollinator insects, inset: detail of Coleoptera full of pollen grains. A, E, G Couvreur 1046 B, C Couvreur 1029 D, F Couvreur 990. Photos Thomas Couvreur.

Figure 23. Distribution map of Uvariodendron fuscum. Shades of grey represent elevation, from white (sea level) to darker grey (higher elevation). The inset shows the extent of the map over Africa.