Stryphnodendron guianense (Aubl.) Bentham (1875: 374)

Scalon, Viviane Renata, Paula-Souza, Juliana De, Lima, Alexandre Gibau De & Souza, Vinicius Castro, 2022, A synopsis of the genus Stryphnodendron (Fabaceae, Caesalpinioideae, mimosoid clade), Phytotaxa 544 (3), pp. 227-279 : 246-247

14. Stryphnodendron guianense (Aubl.) Bentham (1875: 374) .

≡ Piptadenia guianensis (Aubl.) Bentham (1841: 335) . ≡ Folianthera guianensis (Aubl.) Rafinesque (1838: 120) . ≡ Acacia guianensis (Aubl.) Willdenow (1806: 1061) . ≡ Mimosa guianensis Aublet (1775: 938) .— Type: FRENCH GUIANA, “ Habitat in sylvis Caïenna & Guiana”, s.d., Aublet s.n. (BM001135589)

= Stryphnodendron purpureum Ducke (1915: 16) .—Type: BRAZIL. “Alcobaça ad fluvium Tocantins, in sylvis secundariis terrae argillosae rubrae valde frequens”, 28 December 1914, Ducke s.n. (holotype MG 15556 !, isotypes BM!, G!, S!, US!) .

Treelets to trees 2–12(–20) m tall. Leaves with 8–11 pairs of pinnae; (6–)8–14(–18) pairs of leaflets; petiolar nectary 1, verruciform with an elongated base; leaflets (4–)6-15(–23) × 4-8(–13) mm, usually oblong to oblong-rhombic, distal leaflets usually obovate, proximal sometimes elliptic, chartaceous to subcoriaceous, discolor, upper surface usually glabrous to subglabrous, sometimes sparsely puberule, lower surface subglabrous to puberule, unilateral tuft of trichomes on the lower surface present, sometimes inconspicuous. Inflorescences of simple thyrsi, pinkish; cymulae of solitary to 4-ternates spikes; spikes 8–16(–18.5) cm long. Flowers monoclinous or diclinous, corolla glabrous, pinkish. Fruit a nucoid legume, straight to slightly curved, flat-compressed, seeds slightly prominent, valves subcoriaceous, inconspicuously nerved.

Vernacular names: — Talapirinria ( Brazil, Maranhão).

Distribution and habitat: —This taxon occurs in terra firme forests of Northeastern Amazon (Atlantic Coastal, Roraima and Jari-Trombetas phytogeographic provinces). In addition to these areas, S. guianense also occurs in Northeastern Brazil (Ceará and Maranhão states) in secondary vegetation often associated with sandy soils.

Conservation:—Least Concern (LC) [AOO= 40.000 km 2, EOO= 1,265,120.766 km 2]

Phenology: —Specimens with flowers were collected in February and March, June and July, and from October to December, specimens with fruits were collected in May.

Selected specimens examined: —— BRASIL. Ceará: Ubajara, Horto de Ubajara , 03 November 1995, fr., M.A. Oliveira s.n. ( EAC 23383) . Pará: Breu Branco , approx. 40 km S of Tucuruí, then 5 km W on old logging road, 22 November 1981, fl., D.C. Daly 1529 ( INPA) . FRENCH GUIANA. Saül, along airport road on outskirts of Saül , 08 December 1982, fl., S.A. Mori & B. Boom 15361 (P) .