Eperua grandiflora subsp. guyanensis R.S. Cowan (1975: 34)

Fortes, Elenice A., Dos, Ilka P., Steege, Hans Ter, Aymard, Gerardo, Secco, Ricardo De S., Martins-Da-Silva, Regina Célia V. & Mansano, Vidal F., 2023, A taxonomic revision of the genus Eperua (Leguminosae, Detarioideae, Detarieae), Phytotaxa 617 (1), pp. 1-127 : 60-61

9b. Eperua grandiflora subsp. guyanensis R.S. Cowan (1975: 34)

Type : — GUYANA. Bartica-Potaro. 83 mi Bartica-Potaro road, 23 June 1933, Tutin T. G. 245 (holotype US00001146!, isotypes, BM000952283 image!, K000555101 image!, U0003225 image!) .

Leaves margin very revolute, rarely flat. Inflorescences pubescent, puberulous to glabrescent; bracts tomentose, pubescent to puberulous externally, glabrous within; bracteoles 1.9–3.0 × 1.5–3.4 mm, pubescent to puberulous on both sides to glabrous within; pedicel puberulous, pubescent to tomentose; buds pubescent to puberulous, sometimes glabrescent. Flowers: hypanthium tomentose, pubescent to puberulous; sepal pubescent, puberulous to glabrescent; stamens sheath entirely pubescent to puberulous; ovary sericeous. Legumes puberulous.

Phenology:— Flowering from February to April, in June, July, and from September to November; fruiting in January, April, May, August, and October.

Distribution:— Guyana (Cuyuni-Mazaruni, Essequibo Islands–West Demerara, Pomeroon-Supenaam, Potaro-Siparuni, Upper Demerara-Berbice) and Surinam (Nickerie).

Habitat:— White sand ecosystems in wallaba forest, from sea level to 200 m elev, on white and brown sand, sometimes on white sand-brown loamy sand-bauxite mosaic.

Occurrence in protected areas:— Mabura Hill Forest Reserve ( Guyana, Upper Demerara-Berbice), Pibiri Forest Reserve ( Guyana, Upper Demerara-Berbice).

Etymology:— The specific epithet relates to its distribution in Guyana.

Vernacular names:— ituri-wallaba (Ek R.C. & Zagt R. 855, Forest Department 2311, Redden K.M. et al. 1053, Sandwith N.Y. 314, Tutin T.G. 245), wapa-courbaril (Coup C. CL203).

Uses:— Guyana: firewood (Tutin T.G. 245), light poles (Redden K.M. et al. 1053), fences, posts, electricity poles, and roof shingles (H. ter Steege pers. obs.).

Taxonomic notes:— See taxonomic notes of the type subspecies.

Selected specimens:— GUYANA. Cuyuni-Mazaruni, Bartica , Essequibo River, Moraballi Creek , near Bartica, 20 September 1929, Sandwith N.Y. 314 ( RB, U). Essequibo-Demerara Ocidental, 4 km from Santa Mision, 0–200 m elev., 6°30’0”N 58°23’W, 25 November 1992, Ĝrts-van Rijn A.R.A. et al. 403 ( CAY, U, US). Pomeroon-Supenaam, Waraputa compartment , c. 25 km S of Mabura, 0–100 m elev., 5°15’0”N 58°45’0”W, 10 October 1991, Polak A.M. et al. 364 ( U). GUYANA. Potaro-Siparuni, Kuribrong , 112 m elev., 5°21’0”S 59°15’0”W, April 2010, Zartman C.E. 7928 ( INPA, RB ). Upper Demerara-Berbice, Mabura Hill area , 150–200 m elev., 5°20’0”N 58°40’0”W, 05 June 1986, Pipoly J.J. 7560 ( CAY, F, INPA, MO, P, U, US, WAG ); Mabura Hill Forest Reserve , main trail, 69 m elev., 5°9’33.8”N 58°41’51.8”W, 20 October 2002, Redden K.M. et al. 1053 ( U, US). SURINAM. Nickerie, Arkonikreek , Nickerie rivier , 28 August 1976, Teunissen P.A. 16010 ( U).