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 10. Stryphnodendron flavotomentosum A.Lima & V.C.Souza ( Lima et al. , 2021: 70 ) . — Type : BRAZIL . Espírito Santo . Baixo Guandú , Fazenda Galiléia , no barranco do rio próximo a estrada do Mutum Preto em Baixo Guandu , lado esquerdo, 11 December 1991 , D.A. Folli 1519 ( holotype ESA108191 !, isotypes CVRD!, VIES !) Trees , 13– 18 m . Leaves with 9–12 pairs of pinnae; 10–14 pairs of leaflets; petiolar nectary 1, verruciform; leaflets 6– 14 × 5–8 mm , obovate, proximal leaflets oblong to elliptic, chartaceous, subconcolor, upper surface yellow-pubescent, lower surface yellow-tomentulose, unilateral tuft of trichomes on the lower surface present and prolonged up to the 3rd pair of basal veins. Inflorescences of simple thyrsi, brownish; cymulae of solitary to ternate spikes; spikes 8–10.5 cm long. Flowers monoclinous, corolla yellow-sericeous, yellow. Fruit a nucoid legume, straight, flat-compressed, seeds slightly prominent, valves woody, inconspicuously nerved. Distribution and Habitat — Stryphnodendron flavotomentosum is known only in the Atlantic Forest domain from Western Espírito Santo state , municipalities of Baixo Guandu and Marilândia, where it has been collected in forested slopes and river ravines. Conservation —Data Deficient (DD) [AOO = 8 km ², EOO not measurable]. The species is known only from a few collections and the area where it occurs is considered very poorly collected. However, recent collecting efforts have revealed populations of several taxa previously known from limited herbarium samples, and it is possible that intensive field work might increment the available sampling of S. flavotomentosum and broaden its current distribution. Phenology — C ollected with flowers and fruits in December. Selected specimens examined: — BRAZIL . Espírito Santo : Aracruz , atrás do tanque de efluentes, Fábrica , 02 February 1995 , fr., J.N. Neves 97 ( VIES ). Baixo Guandu, Fazenda Galileia, no barranco do rio, próximo à estação do Mutun Preto , 11 December 1991 , fl., A.D. Folli 1519 ( VIES ) .