Monotes glandulosus Pierre (1897: 1299)

Meerts, Pierre, Rougelot, Quentin & Sosef, Marc, 2017, Revision of the genus Monotes (Dipterocarpaceae) in D. R. Congo, with implications for Angola and its distinction from Marquesia, Phytotaxa 308 (2), pp. 151-205 : 196

16. Monotes glandulosus Pierre (1897: 1299)

Type: — ANGOLA (?). Sine loco, sine dato (holo-: P! [barcode P054013988]; iso-: BRLU! (fragm.); photo: BM!, K!) .

Discussion: — Monotes glandulosus Pierre is an enigmatic taxon known from the type specimen only, probably from Angola. Bancroft (1939a) interpreted it as very closely related to M. delevoyi . Duvigneaud (1949) argued that it was almost similar to M. mutetetwa . The type specimen has oblong leaves with irregular margin, glabrous areoles, reticulum with curled hairs and upper surface with remains of short stiff hairs (ca. 0.25 mm long). Such a phenotype combines traits of M. dasyanthus var. mutetetwa and M. adenophyllus var. adenophyllus and a hybrid origin is possible. Some collections from D.R. Congo approach the type of M. glandulosus , especially Callens 3034 (BM!, BR!), Duvigneaud 2530M2 (BRLU!); Duvigneaud 3071 (BRLU!).

References:— Bancroft (1937: 138; 1939a: 341); Catarino et al. (2013: 272); Duvigneaud (1949: 60); Figueiredo & Smith (2008: 67); Gilg (1908b: 291); Lebrun & Stork (1991: 144).