Sabicea mildbraedii var. mildbraedii

Zemagho, Lise A., Liede-Schumann, Sigrid, Lachenaud, Olivier, Dessein, Steven & Sonke, Bonaventure, 2017, Taxonomic revision of Sabicea subgenus Anisophyllae (Ixoroideae, Rubiaceae) from Tropical Africa, with four new species, Phytotaxa 293 (1), pp. 448-450 : 448-450

10c. Sabicea mildbraedii var. mildbraedii ( Fig. 23 )

Sabicea dubia Wernham (1914: 53) . Pseudosabicea mildbraedii ( Wernham 1914: 53) N. Hallé var. dubia (Wernham) N. Hallé (1964: 400) .

Type :— DR CONGO. Madibi, 15 April 1907, A. Sapin s.n. (holotype BR [ BR0000008852069 ]!) .

Stems villose, with stiff, patent and often reddish hairs ca. 2 mm long, intermingled on young stems with a dense white felt of appressed woolly hairs. Leaves villose with stiff hairs above (not felted); densely white-felted and sparsely villose at least on the base of the midrib below. Stipules densely villose to very sparsely felted outside. Hypanthium densely villose, with stiff, antrorse hairs. Calyx tube densely villose outside; lobes variable in shape from almost linear, narrowly triangular, broadly elliptic to slightly spathulate, 1.5–3.5 x 0.5–1.5 mm, acute and often bending outwards at apex, densely white-felted and villose at least on the margin outside, glabrous or sparsely villose inside, with short, appressed, stiff hairs. Corolla lobes villose with stiff hairs (0.7–1.5 mm long) intermingled with a short felt of woolly hairs outside. Fruit densely villose, with stiff, patent hairs 1.5–2 mm long.

Distribution: —Lower Guinea and Congolia Domains. Common and widespread from southeastern Gabon to southwestern DR Congo ( Fig. 24 ), partly overlapping with the range of var. glabrescens .

Habitat and ecology: —Forest-savanna boundaries, young forest regrowth (e.g. along roads and in fallow fields) and woodland; at 300–1050 m altitude.

Phenology: —Flowers collected in all months except July; fruits in January, March and September.

Conservation status:— IUCN Red List Category: Least Concern [LC]. The extent of occurrence is estimated as 239,155.759 km 2 and the area of occupancy as 212 km 2. The latter value falls within the limit for Endangered under criterion B2. However, the taxon is known from more than 10 locations (sensu IUCN 2012), is usually common, and is favoured by human activities due to its preference for open habitats; therefore, it is not a threatened variety.

Additional specimens examined:— DR CONGO. Léo-Kalina “Raquette”, 15 January 1940, A. Becquet 1021 ( BR) ; Léopoldville [=Kinshasa], 14 April 1915, J. Bequaert 7316 ( BR) ; ibid., 7 May 1915, J. Bequaert 7546 ( BR) ; Lac de “Ma Vallée”, Zone Kimwenza, 26 August 1966, H. Breyne 204 ( BR, WAG) ; Nsele - Menkao , zone Maluku, 20 March 1975, H. Breyne 2363 ( BR) ; entre Dembo et le Kwango, October 1900, R.P. Butaye 1487 ( BR) ; environs de Lemfu , October 1903, R.P. Butaye s.n. ( BR) ; Kapana , 21 February 1950, H. Callens 2365 ( BR) ; Kimuenza- Lovanium , 9 November 1955, A. Carlier 28 ( BR) ; Sanda , Territoire Kasangulu, 21 April 1960, P. Compère 1964 ( BR) ; Kenge - Kwango , 3 March 1956, R. Devred 2647 ( BR) ; 40 km SW Kenge vers Popokabaka , 9 May 1948, P. Duvigneaud 8545 ( BRLU) ; Entre Kwango-Wamba , village de Pandi à 25 km est de Dinga, 14 August 1944, R. Germain 2802 ( BR) ; Kimuenza , 10 October 1900, J. Gillet 1623 ( BR) ; Léo II, 5 January 1947, E. Jans 14 ( BR) ; Kinshasa , mont Amba, pic du mont, près du monastère des Norbertins, 4 June 1974, A. Lawalrée 18323 ( BR) ; Plateau Batéké (zone de Maluku) près de Mutiene, sur les rives de la Bombo, 9 December 1982, J. Lejoly 82/722 ( BR, BRLU, WAG) ; Miabi (territoire Bakwanga), 21 November 1956, L. Liben 1972 ( BR, P) ; environ 30 km au SW de Kinshasa. Bord du lac Ma Vallée , 14 April 1979, S. Lisowski 52155 ( BR) ; Région de Kinshasa , plateau de Batéké, route Menkao-Mutiene, près du pont sur la Bombo, 9 December 1982, S. Lisowski 85841 ( BR) ; Environs de Kinshasa , zone de Kimuenza, bord du lac de “Ma Vallée”, 12 December 1982, S. Lisowski 86156 ( BR, WAG) ;

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Phytotaxa 293 (1) © 2017 Magnolia Press • 49 Région de Kinshasa , plateau de Batéké, route Menkao-Mutiene, près du pont sur la Bombo, 9 December 1982, S. Lisowski 86617 ( BR, WAG) ; Kikwit / Erco, 21 November 1990, B. Masens 503 ( BR, BRLU, MO, WAG) ; Manenga , Territoire Kimbanseke, 6 December 1979, Nkunga 6255 ( BR) ; Kingana , territoire Popokabaka, 26 November 1958, L. Pauwels 714 ( BR) ; Kimvula , territoire Popokabaka, 06 January 1959, L. Pauwels 1118 ( BR) ; Kimvula , 18 June 1959, L. Pauwels 3318 ( BR) ; Kimuenza Lovanium , Territoire Binza, 21 January 1957, W. Robyns 4199 ( BR) ; Madibi , April 2007, A. Sapin s.n. ( BR) ; Sanda , 26 November 1908, H. Vanderyst s.n ( BR.) ; Sanda , April 1925, H. Vanderyst 14648 ( BR) . GABON. just outside W of Kelé on road towards Franceville , 3 March 1999, L. Andersson & A. Nilsson 2302 ( BR) ; 6 km Moanda -Franceville , 1 September 1970, F.J. Breteler 6248 ( BR, P, WAG); Plateau Batéké, 37 km E of Franceville, 7 December 1989, J.J.F.E. de Wilde 9973 ( BR, WAG) ; Kessala village , 29 February 2008, S. Dessein, O. Lachenaud, S. Janssens, Y. Issembe & T. Nzabi 2195 ( BR) ; SSE of Moanda, near Mandjaye , 26 November 1992, J.J. Dibata 1098 ( MO, UPS, US, WAG) ; Route Moanda-Mounana , km 8, piste à gauche 1 km, 5 November 1984, A.M. Louis 1637 ( MO, WAG) ; ca. 70 km S of Okondja on road to Franceville , 2 November 2005, M.S.M. Sosef, T.L.P. Couvreur, M. Botermans, Y. Azizet Issembé & J.-.N. Boussiengui 2195 ( WAG) ; Batéké Plateau , Station of the Projet de Protection des Gorilles, 21 November 2001, G. Walters, A. Bradley, G. Nang-Essouma & A. Mbaniboua 900 ( BR, MO, WAG) ; Plateaux Batéké National Park. Mpassa River drainage; 6 km from Projet Protection des Gorilles, Along Mpassa River, 3 March 2003, G. Walters & R. Niangadouma 1221 ( MO, WAG) ; Batéké Plateaux , Ekouyi Mbouma village, 9 December 2007, G. Walters & G. Kandinia 2082 ( BR, MO) . REPUBLIC OF CONGO. Mayama , 26 November 1930, Babet s.n. (P); Malengo , 19 August 1964, A. Bouquet 399 (P); Parc National d’Odzala, savane à ca. 10 km du Camp Mboko, sur piste vers Mbomo, 5 December 1994, D. Champluvier 5029 ( BR, WAG) ; Brazzaville , January 1904, A.J.B. Chevalier 11381 (P); Gompaka, 5 August 1912, A.J.B. Chevalier 27707 (P); route Brazzaville–Kinkala, km 37, recû forestier de Kingoye, 5 December 1962, B. de Néré 35 ( MPU, P); Cataractes, route Brazzaville à Kinkala, piste à gauche du village de Tonkama km 38, 14 December 1962, B. de Néré 128 (P); Cataractes, à 42 km, route BrazzavilleKinkala, piste à gauche après Tonkama, 20 December 1962, B. de Néré 216 ( MPU) ; plateau des Cataractes, région

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de Boko , 4 August 1963, B. de Néré 298 ( MPU, P); same locality and date, B. de Néré 373 ( MPU) ; plateau des Cataractes, route Brazzaville-Kinkala , km 30, forêt de Kubola, 9 June 1960, B. Descoings 5740 ( MPU, P) ; Bassin de l’Alima-Likouala, région de Makoua, à 11 km sur la route d’Etoumbi , 12 June 1961, B. Descoings 7344 ( MPU, P) ; Plateau des Cataractes, à 20 km de Kibossi sur la route de Brazaville , 17 December 1962, B. Descoings 9668 ( BR, MPU, P) ; Plateau Batéké, ancien village sur le bord des falaises de Douvres , 26 November 1962, B. Descoings 9841 ( MPU) ; région de Kindamba, entre Meya et Loukakou, piste des grottes de Meya , 7 February 1963, B. Descoings 11393 (P) ; Yakatopema ( Moukouma ), new MPD camp, 28 January 2009, E. Kami 4084 ( BR, WAG) ; Parc National d’Odzala , environ 1 km à l’est du Camp Ikouélé, 21 June 1995, Kouka 154 ( BRLU) ; Vers Mpika (35 km au NNW de Brazzaville), 8 November 1987, J. Lejoly 87/095 ( BR) ; Parc National d’Odzala , piste de Mbomo vers le camp caravati km 17, 12 December 1990, J. Lejoly & J.M. Moutsamboté 328 ( BRLU) ; Parc National d’Odzala , piste de Mbomo vers le camp caravati km 17, 12 December 1990, J. Lejoly & J.M. Moutsamboté 350 ( BRLU) ; Parc National d’Odzala, entre le Camp Ikouélé et le camp Mboko , 8 December 1993, J. Lejoly 93/450 ( BRLU) ; Cataractes, km 56, près du village Yanga , 6 January 1989, S. Lisowski B-5359 ( BR) ; Parc National d’Odzala, près du campement du layon N’Tombi , 12 February 1994, S. Lisowski C-802 ( BRLU) ; Parc National d’Odzala , ca. 2 km W du Camp Mboko, 3 February 1994, S. Lisowski C-917 ( BRLU) ; piste BrazzavilleKinkala , km 40, 15 January 1955, Prévost 95 (P) ; Bafuru plateau, Léfini Animal Reserve, grassland on lower slopes of Léfini ravine, 12 October 1991, D.W. Thomas & D. Harris 8597 ( MO) ; Pool, Réserve de Chasse de Léfini, banks of the Léfini river near its confluence with the Louna river, ca. 20 km upstream from Mbouanbé, 24 October 1991, D.W. Thomas, D. Harris & J.-M. Moutsamboté 8713 ( MO, WAG) ; région de Fort-Rousset [= Owando ], 17 February 1958, Trochain 10858 (P) .

Figures

FIGURE 23. Sabicea mildbraedii var. mildbraedii. A, flowering stem; B, detail of a node with inflorescence, stipules and reduced leaf; C, short-styled flower; D, section of long-styled flower; E, fruit. From Breteler 6248 (A), Walters & Kandinia 2082 (B), Nkunga 6255 (C), Robyns 4199 (D), Walters & Niangadouma 1221 (E). Drawn by Antonio Fernandez.

FIGURE 24. Distribution of Sabicea mildbraedii var. mildbraedii.