A synopsis of the genus Stryphnodendron (Fabaceae, Caesalpinioideae, mimosoid clade) Author Scalon, Viviane Renata 0000-0001-7000-6641 Universidade Federal de Ouro Preto, Herbário OUPR. Campus Morro do Cruzeiro s. n., 35400 - 000, Ouro Preto / MG, Brazil. vrscalon @ gmail. com; https: // orcid. org / 0000 - 0001 - 7000 - 6641 vrscalon@gmail.com Author Paula-Souza, Juliana De Universidade Federal de Santa Catarina, Departamento de Botânica / CCB. Rua Eng. Agronômico Andrei Cristian Ferreira 216, 88040 - 535, Florianópolis / SC, Brazil. Author Lima, Alexandre Gibau De Universidade de São Paulo, ESALQ. Av. Pádua Dias 11, 13418 - 900, Piracicaba / SP, Brazil. & Escola Nacional de Botânica Tropical, Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão 2040, 22460 - 030, Rio de Janeiro / RJ, Brazil. alegibau @ gmail. com. Author Souza, Vinicius Castro Universidade de São Paulo, ESALQ. Av. Pádua Dias 11, 13418 - 900, Piracicaba / SP, Brazil. text Phytotaxa 2022 2022-05-03 544 3 227 279 http://dx.doi.org/10.11646/phytotaxa.544.3.1 journal article 55680 10.11646/phytotaxa.544.3.1 f125f93d-3a5b-48a3-9561-4ebee258e3d6 1179-3163 6520280 24. Stryphnodendron platyspicum Rizzini & Heringer (1966: 106) . — Type : BRAZIL . Distrito Federal , Brasília , “Crescit ad campos in Goiás ” , 5 November 1961 , Heringer 8733 ( holotype RB 113247!, isotypes HB!, R!, UB !) = Stryphnodendron pumilum Glaziou (1906: 177) , opus utiq. oppr. Subshrubs 25–50 cm tall, usually cespitose, bearing a well-developed, woody underground root-like system. Leaves with (2–)3–5(–7) pairs of pinnae; (4–)6–8(–13) pairs of leaflets; rachis nectaries (1)2–3, patelliform to rarely verruciform; blade subcoriaceous to coriaceous, margin glabrous, leaflets (0.8–)1.2–2(–3.5) cm, discolor, glabrous on both surfaces, sometimes sparsely pubescent on the lower surface near the insertion of the secondary petiolule, unilateral tuft of trichomes on the lower surface absent. Inflorescences of simple thyrsi, cymulae of usually geminate spikes, sometimes 3–4 ternate, vinaceous. Flowers monoclinous, vinaceous to reddish. Fruit a follicule, straight to very rarely slightly curved, flat-compressed, 5.5–6.5 × 1.5–2 cm , valves vinaceous to dark-brown ( Fig. 2C ). Vernacular names: — Barbatimão-miúdo. Distribution and habitat: — Stryphnodendron platyspicum samples are known only from the Federal District and neighboring areas in Goiás state in Brazil . The natural habitats of this species are very reduced, mainly due to the urban expansion in Brasília and surroundings. This species is usually found in woody cerrados, but also in more open physiognomies (campo cerrado). Conservation: —Vulnerable (VU B1ab(i,iii)+2ab(ii,iii) [AOO= 60.000 km 2 , EOO= 2,333.839 km 2 ]. Although some populations of Stryphnodendron platyspicum are restricted to small areas, in situ observations in Brasília revealed that they are usually abundant in individuals. Furthermore, herbarium collections indicate that the species is frequently found in conservation units, such as the Águas Emendadas Biological Reserve and the IBGE Ecological Reserve. Phenology: —This species was collected with flowers from August to December and with immature fruits in September, mature fruits collected from November to February. Selected specimens examined: — BRAZIL . Distrito Federal : Brasília , Reserva Ecológica do IBGE, nascente do Ribeirão do Monjolo , 22 December 1994 , fl., M.L. Fonseca & E.C. Lopes 139 ( IBGE , RB ) . Brasília , Reserva Ecológica do IBGE, cerrado próximo à confluência do córrego Taquara , 09 January 1992 , fr., B.A.S. Pereira 2039 ( IBGE , RFA, UEC ) .