Campylospermum glaucifolium Biss., 2013

Campylospermum glaucifolium Biss. View in CoL , sp. nov. — Fig. 2 View Fig ; Map 3 View Map 3

Diagnosis — A species resembling C. calanthum (Gilg) Farron , but with a glaucous upper leaf surface (at least when dry), longer petiole, and a pendulous inflorescence that carries 0–2(–3) racemes.

Type. J.J.de Wilde et al.10165 (holo WAG;iso LBV), Gabon, Estuaire, 1 km

W of Nkan,along the road from Assok to Méla, N0°40', E10°19', 23 Jan.1991.

Treelet up to 2 m tall. Stipules caducous, 2–3 mm long. Leaves: petiole 7–15(–20) mm long, canaliculate above; leaf blade nar- rowly elliptic to narrowly elliptic-obovate, 13–25(–30) by 4–7 (–8) cm, base cuneate, apex acuminate, leathery to coriaceous, margin serrulate, upper surface glossy, dark green but turning glaucous when dry, lower surface pale green, young leaves reddish; midrib generally prominent on both sides, main lateral veins 10–15 mm apart, 14–16 on either side, slightly prominent above, prominent below, curved upward to run parallel to the margin, tertiary venation scalariform, running perpendicular to the midrib thus causing the formation of a decreasing series of intermediate lateral veins, indistinct above, distinct below. Inflorescences terminal, pendulous, (9–) 15–33 cm long; peduncle slender; racemes 0–2(–3), 3–6(–10) cm long; pairwise scales persistent at the base of peduncle; bracts caducous, triangular, c. 2–3 mm long; cymules 0.5–1(–1.5) cm apart, 1–4-flowered. Flowers: pedicel 3 –12 mm, articulated at 1–3 mm from the base; sepals, ovate, in flower 6–7 by 2–3 mm, green-yellowish, in fruit 8–9 by 3–4 mm, persistent and accrescent, bright red; petals obovate, 7–9 by 4–5 mm, shortly clawed at base, rounded at apex, bright yellow; stamens 10, filaments less than 1 mm long, anthers 5–6 mm long, transversely wrinkled, pori- cidal; ovary c. 2 mm wide; style slender, 6–7 mm long. Fruits: receptacle a ± flattened-globose shape, c. 3 mm wide, red; drupelets 1–4 well developed per receptacle, reniform, black at maturity; cotyledons accumbent, similar in size.

Distribution — Continental Equatorial Guinea ( Rio Muni), Gabon and south-western Republic of the Congo (Niari).

Ecology — In primary and secondary forest, on creek banks and adjacent to swampy areas; at 210–1000 m altitude.

Phenology — Flowers collected in January, April, July and August; fruits collected from March to May and in August.

Preliminary IUCN conservation status — LC. EOO = 72,683 km 2, AOO = 23,157 km 2, locations = 9 (cell width = 50.79 km). This species, although being sub-endemic to Gabon, has a fairly wide distribution and hence its EOO and AOO are com- paratively large, and above the IUCN thresholds. Potential future threats could come from habitat destruction (logging or land transformation) but a fair number of populations are located within protected areas (PN de Monte Alen, Monts de Cristal NP, Waka NP, Lopé Reserve). Therefore, the category of ‘Least Concern’ is here proposed.

Additional material. CONGO (BRAZZAVILLE), Niari: Bissiengou 1326 ( LBV, WAG), route Malinga-Divénié , 4 km du village Mollo , S2°29.64' E12°09.61', 480 m, 13 June 2011 (st) GoogleMaps . – EQUATORIAL GUINEA, Rio Muni, Centro Sur: Desmet, G. 242 ( BRLU), Mundung ‘ Les 4 montagnes’, N1°38' E10°11', 1000 m, 8 Jan. 2003 (fr); Ngomo 418 ( BRLU), Parc National de Monte Alen ,c. N1°40' E10°17', 30 July 1998 (fl); Pérez Viso 1139 ( MA), Parque Nacional de Monte Alén , Esamalang, camino hacia Mondung, c. N1°33' E10°12', 13 May 1999 (fr); Senterre 4122 ( BRLU), Parc National de Monte Alen , 11 km à l’Est de la cabaña de Mosumo, N1°36.4' E10°08.5', 12 July 2003 (st); Wilks 1796 ( LBV, WAG), Monts de Cristal , 10 km ENE d’Okuamkos, N1°10' E10°16', 12 Aug. 1988 (fl) GoogleMaps . – GABON, Estuaire: J.J.F.E. de Wilde 10257 ( LBV, WAG), Crystal Mountains, 25 km on the road Tchimbélé-Kinguélé, N0°31' E10°18', 360 m, 26 Jan. 1991 (fl). Ngounié: A.M. Louis 3058 ( LBV, WAG), route chantier Leroy Massika entre Mouila et Yeno, S1°40' E11°15', 600 m, 27 Apr.1989 (fr); Bissiengou 1343 ( LBV, WAG), route Malinga-Rebé, S2°23.07' E12°03.35', 489 m, 14 June 2011 (st); Bissiengou 1436 ( LBV, WAG), Sindara, après village Matadi 7 route exploitation forestière EGG (ancien IFL), S1°02.26' E10°42.47', 49 m, 22 June 2011 (st); Wieringa 5192 ( LBV, WAG), upper Waka area, 13 km on IFL forestry road B2, S1°20.5' E10°52.2', 180 m, 31 Mar. 2004 (fr). Ogooué-Ivindo: Bissiengou 1056 ( LBV, WAG), Nord-Est du parc de la Lopé, 25 km du carrefour qui mène à l’ancien Bo- oué Bac, S0°11.42' E11°50.05', 251 m, 6 Mar. 2010 (fr); Dibata 117 ( MO, WAG), Chantier Koumameyong, côté rivière-Marécage à raphia, c. N0°31' E11°55', Mar. 1987 (fr). Ogooué-Maritime: van Valkenburg 3162 ( BR, LBV, MO, WAG), old logging road leading southward from chantier CBG Peni, S2°07.76' E10°24.95', 210 m, 22 Apr. 2005 (fl). Woleu-Ntem: Bissiengou 961 ( LBV, WAG), Parc des Monts de Cristal , le long de la rivière Mbé, piste après la case picnic sur la droite, c. N0°37' E10°24', 13 Feb. 2010 (st); Wieringa 500 ( BR, C, LBV, MO, PRE, WAG), Crystal mountains , 5.5 km NNE of Tchimbélé, N0°40' E10°25', 31 Jan. 1990 (fl) GoogleMaps .