Stryphnodendron heringeri Occhioni

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 : 247

15. Stryphnodendron heringeri Occhioni f. ( Occhioni 1985: 63).

— Type: BRAZIL. Goiás, Alto Paraíso de Goiás, a ca. 87km ao N da cidade, 30 October 1979, Equipe IBGE [“ Heringer ”] 2636 (holotype IBGE 15208 !, isotypes HB!, K!, MO!, NY!, RB!, UEC!)

Subshrubs 50–100 cm tall, usually cespitose, bearing a well-developed, woody underground root-like system. Leaves with (4–)8–10 pairs of pinnae; (11–)13–19 pairs of leaflets; rachis nectaries 2-3, verruciform; blade chartaceous, margin glabrous, leaflets (6–)8–14(–18) × (2–)4–6(–9) mm, discolor, usually glabrous on both surfaces, sometimes sparsely pubescent along the midrib on the lower surface, unilateral tuft of trichomes on the lower surface absent. Inflorescences of simple thyrsi; cymulae of usually solitary spikes, sometimes geminate. Flowers monoclinous. Fruit a follicule, straight to very slightly curved, flat-compressed, 11–14 × 1–1.5 cm, valves vinaceous to dark-brown ( Fig. 2A ).

Distribution and habitat: — Stryphnodendron heringeri is endemic to Chapada dos Veadeiros, Goiás state in Brazil. The type specimen of this species was collected in a location referred to as “Serra da Cristalina”, which is a very frequent toponym for sites abundant in crystals. This particular location at Chapada dos Veadeiros is not related to Serra dos Cristais to where S. cristalinae is endemic, having a different geomorphological structure and flora. Natural populations of S. heringeri are usually found in areas of campo cerrado, campo sujo or campo limpo, usually associated with sandy and lateritic, shallow soils.

Conservation: —Critically Endangered (CR B1ab(ii,iii,iv)) [AOO= 8.000 km 2, EOO= 62.393 km 2] The species shows a very reduced distribution in threatened areas not covered by legal protection.

Phenology: —This species was collected with flowers in October and November, with fruits from February to March and October to November.

Selected specimens examined: — BRAZIL. Goiás: Água Fria de Goiás, 12 km ao N de Água Fria, em direção ao lago Jacuba, 20 November 2015, fl., M.F. Simon 2659 ( CEN). São João da Aliança , Chapada dos Veadeiros, ca. De 87 km ao Norte da cidade, 30 November 1979, fr., E.P. Heringer et al. 2636 ( IBGE, NY) .

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.