Monotes caloneurus Gilg

Catarino, L., Martins, E. S., Abreu, J. A. & Figueira, R., 2013, Revision of the family Dipterocarpaceae in Angola, Blumea 57 (3), pp. 263-274 : 267

7. Monotes caloneurus Gilg

Monotes caloneurus Gilg (1899) 136. — Syntypes: Buchner 159 (B†?, n.v.), Angola, Malange , Jan. 1880; Buchner 524 ( B †?, n.v.), Angola, Malange , April 1880 ; Mechow 434 ( B †?, n.v.), Angola, Malange , Jan.1880 ; Mechow 455 ( B †?,n.v.; W,seen in JSTOR), Angola, Malange , March 1880 ; Schweinfurth 2678 ( B †?, n.v.; K, seen in JSTOR), Central Africa , 17 Nov. 1869 .

Small tree up to 10 m tall, or shrub. Leaves 10–15(–20) by 5 – 8(–11) cm, oblong-elliptic to ovate-oblong, rounded to emarginate at the apex, rounded to cordate at the base; upper surface glabrous in mature leaves, except for the midrib which can maintain straight hairs; basal gland elliptical; lower surface yellowish to brownish, tomentose in young leaves, less dense with age, with curled hairs on the veins and minute, dense stellate hairs covering the interreticular areoles, lateral nerves 12–16 pairs, prominent in the lower surface, brown-coloured; petiole robust, 1.4– 2.5 cm long. Inflorescences axillary, 5 –7 cm long, with numerous flowers. Flowers with sepals c. 3 mm long, tomentose, petals 6 – 8 mm long, sericeous, anthers with a long triangular appendage at the apex. Fruits globose c. 1 cm diam; wings 4–5 by 1.5–2.5 cm, elliptical to obovate.

Ecology — In subxerophilous forest; altitude up to 1300 m.

Distribution — BE: Dechamps, Murta & Silva 1069 (LISC). – BI: Cardoso s.n. (LISC); Dechamps, Murta & Silva 1389 (LISC); Monteiro & Murta 1846 (LISC). – CN: Teixeira et al. 12102 (LISC). – CS: Exell & Mendonça 3077 (COI); Raimundo, Matos & Figueira 681A (LISC); Santos 1309, 1313 (LISC). – HA: Dechamps, Murta & Silva 1069 (LISC); Gossweiler 9965 (COI, LISC); Henriques 890 (LISC, LISU); Silva 3442 (LISC). – MA: Exell & Mendonça 109 (LISC); Gouveia 1476 (LISC); Santos 1369 (LISC).Also in the Democratic Republic of the Congo and Zambia.

Note — Duvigneaud (1949) distinguishes variety dawei (H.H.Bancr.) H.H.Bancr. and the form cordatus (Hutch.) P.A. Duvign. , but these taxa were not accepted widely and we see no necessity to distinguish subspecific taxa in this species.