Uvariopsis congensis var. angustifolia Dagallier & Couvreur, 2023

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

Uvariopsis congensis var. angustifolia Dagallier & Couvreur var. nov.

Type.

South Sudan - Unknown major area • I. Friis 735 (holotype: K! (no barcode)), Talanga; 4°01'N, 32°45'E; alt. 1300 m; 07 Dec. 1980 .

Diagnosis.

Up. congensis var. angustifolia differs from the type variety in being trees 7-15 m high (vs. shrubs to trees 2-6 m high) and having narrowly elliptic leaves with a length:width ratio between 3 and 4 (vs. elliptic to obovate leaves with a length:width ratio between 2.1 and 3.1).

Description.

Tree 7-15 m tall. Leaf lamina 73-166 mm long, 22-46 mm wide, length:width ratio 3-4, narrowly elliptic.

Distribution.

Element of the Congolia Domain of the Guineo-Congolian Region and the Somalia-Masai Region: Democratic Republic of the Congo, Kenya, Uganda.

Habitat and ecology.

Lowland and premontane mature or secondary rain forests. Altitude: 470-1000 m asl.

Notes.

The variety Uvariopsis congensis var. angustifolia was created to acknowledge the clear morphological variation exhibited by several specimens (mainly from East Africa), being taller trees and having narrower leaves than the other specimens (mainly from Central Africa), although this morphotype is not monophyletic (see Fig. 1 , Suppl. materials 1, 2).

Additional specimens examined.

Democratic Republic of the Congo - Orientale • J.-P.A. Lebrun 2463 (P), Likati Uele ; 3°32'25'N, 24°02'11'E; Mar. 1931 • J.-P.A. Lebrun 2619 (P); Buta, Buta-Uele ; 2°48'16.32'N, 24°44'59.68'E; Mar. 1931 • J.L.P. Louis 9562 (K); Isangi, Yalulia, à 20 km à l'Est de Yangambi ; 0°40'N, 24°38'E; alt. 470 m; 30 May. 1938 . Kenya - Nyanza • B. Verdcourt 1695 (K); North Kavirondo, Kakamega Forest Station , By roadside leading to Yala River from Junction of main road with road leading to Forest House section. Kakamega Forest ; 0°14'N, 34°51'E; 10 Dec. 1956 • R.B. Faden 70/34 (EA, K); North Kavirondo, Kakamega Forest, Kibiri Block, S. side of Yala River ; 0°11'N, 34°52'E; alt. 1550 m; 21 Jan. 1970 . Uganda - Buganda • B.T. Styles 236 (K); Mengo, Mabira C.F.R., coupe 71; 0°29'03.48'N, 32°59'05.64'E; alt. 1100 m; 23 Nov. 1962 - Central • R.A. Dümmer 5591 (K), Mulange ; 0°30'28.76'N, 33°02'39.79'E; Oct. 1922 - Western Province • B.T. Styles 122 (K); Masindi District, Budongo Forest Reserve, Waibira Block Compt. 19; 1°43'N, 31°32'E; alt. 1097 m; 04 Oct. 1962 • C.M. Harris 167 (K); Masindi District, Budongo Forest Reserve ; 1°43'N, 31°32'E; Nov. 1932 • D.L.N. Hafashimana 13 (K); Masindi District, Budongo Forest Reserve, Kaniyo - Pabidi beat; 1°43'N, 31°32'E; alt. 1010 m; Feb. 1996 • H.A. Lindeman 534 (K); Masindi District, Budongo Forest Reserve ; 1°43'N, 31°32'E; Mar. 1939 • J.G. Myers 13647 (K); Masindi District, Budongo Forest Reserve ; 1°43'N, 31°32'E; 20 Dec. 1940 • M.T. Dawe 484 (K); Toro, Toro at Isungu ; 0°28'59.88'N, 30°19'00.12'E; alt. 1500 m; 06 Sep. 1905 • S. Paulo 581 (K); Kabarole, Fort Portal Forest Reserve ; 0°40'N, 30°16'E; 18 Jul. 1960 • W.J. Eggeling 2291 (EA, K); Masindi District, Budongo Forest Reserve ; 1°43'N, 31°32'E; Nov. 1935 • W.J. Eggeling 3154 (K); Toro, Kibale Forest ; 0°30'N, 30°24'E; Aug. 1936 • W.J. Eggeling 3357 (K); Masindi District, Budongo Forest Reserve ; 1°43'N, 31°32'E; Jun. 1937 . Zambia - North-Western • F. White 3334 (BM, K, MO); Mwinilunga, west of Kalene Hill Mission ; 11°10'02.24'S, 24°09'54.84'E; 22 Sep. 1952 .

Figures

Figure 1. Phylogenetic trees of the Monodoreae inferred with ASTRAL, based on 334 nuclear genes trees. The branch support is given as local posterior probability (LPP) in three shades of greys. For the details on the specimens see Suppl. material 3. Insets: flowers of A Ophrypetalum odoratum (Couvreur 82) B Sanrafaelia ruffonammari (Dagallier 31) C Asteranthe asterias (Dagallier 10) D Hexalobus crispiflorus (no specimen associated) E Uvariastrum zenkeri (no specimen associated) F Isolona hexaloba (no specimen associated) G I. cauliflora (Dagallier 44) H Monodora grandidieri (Dagallier 26) I M. myristica (living specimen at NY conservatory) J M. tenuifolia (Couvreur 1019) K Mischogyne elliotana (no specimen associated) L Uvariodendron gorgonis (Dagallier 38) M Ud. molundense (Bidault 2222) N Ud. connivens (Couvreur 1016) O Ud. var. fuscum (Couvreur 990) P Uvariopsis congensis (Lachenaud 1384) Q Up. lovettiana (Couvreur 97 b) R Up. bakeriana (Couvreur 1000) S Up. submontana (Couvreur 627) T Up. pedunculosa (Couvreur 878). Photos CC BY-NC 4.0 A, D-F, J, N, O, Q-T Thomas Couvreur B, C, G-I, L Leo-Paul Dagallier K Carel Jongkind M Ehoarn Bidault P Olivier Lachenaud.