Stryphnodendron platyspicum Rizzini & Heringer (1966: 106)

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 : 258

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) .

Figures

FIGURE 2. Subshrub species of Stryphnodendron. A. Stryphnodendron heringeri Occhioni f.; B. Stryphnodendron barbatulum Rizzini & Heringer; C. Stryphnodendron platyspicum Rizzini & Heringer; D. & E. Stryphnodendron cristalinae Heringer, the woody underground root-like system in detail.