Duguetia confinis (Engl. & Diels) Chatrou, Changing Genera: 67, 1998

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 : 103-104

Duguetia confinis (Engl. & Diels) Chatrou, Changing Genera: 67, 1998

Figs 25 , 26 ; Map 3I

≡ Pachypodanthium confine Engl. & Diels, Notizbl. Konigl. Bot. Gart. Berlin 3: 55, 1900.

= Pachypodanthium sargosii R.E.Fr., Ark. Bot. 3(2): 38, 1955; Pachypodanthium confine var. sargosii Le Thomas, Fl. Gabon 16: 106, 1969. Type. Republic of Congo: Kouilou, Sargos R. 29, 4 Mar 1920: lectotype, sheet here designated: P[P00364784]; isotype: P[P00364785].

Type.

Gabon. Estuaire; Libreville, Klaine T.-J. 217, 10 Oct 1895: lectotype, sheet here designated: P[P00315819]; isotypes: P[P00315821, P00315815] .

Description.

Tree, 15-40 m tall, d.b.h. 40-85 cm; stilt roots or buttresses absent. Indumentum of stellate hairs; old leafless branches sparsely pubescent to glabrous, young foliate branches densely pubescent. Leaves: petiole 1-8 mm long, 2-6 mm in diameter, densely pubescent, cylindrical, blade inserted on the side of the petiole; blade 9-31 cm long, 3-8 cm wide, elliptic, apex acute, acumen 0.5-1 cm long, base rounded to acute, coriaceous, below densely pubescent with white erect stellate hairs covering the whole blade when young and old, above glabrous when young and old, discolorous, whitish below; midrib sunken or flat, above glabrous when young and old, below densely pubescent when young and old; secondary veins 14 to 25 pairs, indistinct, glabrous below; tertiary venation reticulate. Individuals bisexual; inflorescences ramiflorous on old leafless branches, appearing axillary, forming on a short peduncle 2-11 mm long. Flowers with 9 perianth parts in 3 whorls, 2 to 5 per inflorescence; pedicel 3-20 mm long, 2-5 mm in diameter, densely pubescent; in fruit 3-20 mm long, 2-5 mm in diameter, glabrous to densely pubescent; bracts 2, one basal and one towards the upper half of pedicel, basal bracts 5-9 mm long, 5-10 mm wide; sepals 3, valvate, free, 17-22 mm long, 13-15 mm wide, ovate, apex acute, base truncate, green, densely pubescent outside, glabrous inside, margins flat; petals free, outer petals longer than inner to sub equal; outer petals 3, 11-18 mm long, 5-9 mm wide, elliptic, apex acuminate, base truncate, cream to white, margins wavy, densely pubescent outside, glabrous inside; inner petals 3, imbricate, 11-18 mm long, 5-9 mm wide, elliptic, apex acuminate, base truncate, cream, margins flat, pubescent outside, glabrous inside; stamens 290 to 310, in 7 to 8 rows, 1-2 mm long, broad; connective discoid, glabrous, red; staminodes absent; carpels free, 100 to 125, ovary 1.4-2 mm long, stigma globose, glabrous. Fruit pseudosyncarpous, 25-50 mm in diameter, ellipsoid; individual carpels sessile, 100 to 125 carpels, completely fused, 15-12 mm long, 2-5 mm in diameter, obovoid, apex apiculate to acute, densely pubescent, longitudinally ribbed with 5 to 6 main ribs, greyish brown with purplish red or pale brown pulp when ripe; seed 1 per monocarp, 10-14 mm long, 4-8 mm in diameter, ellipsoid; aril present, red.

Distribution.

From Cameroon to Gabon and Republic of Congo; in Cameroon known from East, South and Littoral regions.

Habitat.

In lowland periodically inundated or non-inundated rain forests. Altitude 0-50 m a.s.l.

Local and common names known in Cameroon.

None recorded.

IUCN conservation status.

Least Concern (LC) ( Cosiaux et al. 2019j).

Uses in Cameroon.

None recorded.

Notes.

Duguetia confinis is distinguished by its lower leaf surface, which is densely pubescent with erect stellate hairs completely covering the blade, and its carpels completely fused in fruit.

Specimens examined.

Central Region: Est N of Lom near Sanaga river ( Yaundé) 250 km from Deng Deng , 4.84°N, 13.19°E, 01 March 1914, Mildbraed G.W.J. 8558 (K). Littoral Region : Au sud de Ngola (8 km E de l’embouchure de la Sanaga), 3.55°N, 9.698°E, 05 January 1974, Letouzey R. 12585 (P); Douala-Edea Reserve 10B, 5.01°N, 13.33°E, 01 April 1978, Thomas D.W. 1237 (K). South Region : ca 16 km from Kribi Ebolowa road Bidou plantation Kienke forReserve, 2.85°N, 10.01°E, 03 February 1969, Bos J.J. 3844 (WAG,YA); 20 km From Kribi N of Lolodorf road (SFIA logging road), 3.01°N, 10.05°E, 15 July 1969, Bos J.J. 5048 (BR,BR,K,WAG,YA); Mt Elephant ca 18 km SE of Kribi, 2.78°N, 10.5°E, 14 January 1970, Bos J.J. 6128 (BR,P,WAG); Near mouth of, 3.17°N, 9.961°E, 28 March 1928, Hédin L. 1690 (P,WAG); Campo-Ma’an area 2.71°N, 9.866°E, 26 October 2001, van Andel T.R. 4205 (KRIBI,WAG); Bipindi, 3.08°N, 10.42°E, 01 January 1904, Zenker G.A. 3195 (B,BR,E,G,L,M,MO,P,S) .

Figures

Map 3. A Artabotrys velutinus B Brieya fasciculata C Cleistopholis glauca D Cleistopholis myristiciflora E Cleistopholis patens F Cleistopholis staudtii G Dennettia tripetala H Duguetia barteri I Duguetia confinis. White borders represent region limits in Cameroon; green patches represent protected areas (see methods and Suppl. material 1: Fig. S 1).

Figure 25. Duguetia barteri A flower, side view B flower, bottom view C fruit, note fused monocarps into a syncarpous fruit, referred to as a pseudosyncarp and with dome shaped apex D longitudinal section of fruit, note completely fused monocarps. Duguetia confinis E leaves, upper side F base of leaf blade, upper side G base of leaf blade, lower side, note whitish pubescence representing minute stellate hairs completely covering whole lower side of leaf blade H flowering branch I flower, top view J detail of receptacle, all petals removed A, B Sosef 2138, Gabon C, D Couvreur 393, Ngovayang, Cameroon E-J Couvreur 527, Gabon. Photos Thomas L. P. Couvreur.

Figure 26. Duguetia staudtii A flowering branch B detail of stellate pubescence on lower side of leaf blade C flower bud, side view D carpel, side view E syncarpous fruit, referred to as a pseudosyncarpous fruit F longitudinal section of fruit. Duguetia confinis G flowering branch H detail of pubescent on lower side of blade, note that it is completely covering the lower surface I flower bud, side view J detail of flower, sepals removed K outer petal, inner view L inner petals, inner view M stamen, side and front views N carpel, side and front views O longitudinal section of fruit, note completely fused monocarps P seed A-D from Letouzey 4438 E, F from Chevalier 16224 G, H from Le Testu 1774 I-N, P from Klaine 217 O from Lecompte s. n. Drawings by Helene Lamourdedieu, Publications Scientifiques du Museum national d'Histoire naturelle, Paris; modified from Le Thomas (1969 b, pl. 18, p. 105).