Stryphnodendron cristalinae Heringer ( Rizzini & Mattos Filho 1968: 234 )

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 : 240

6. Stryphnodendron cristalinae Heringer ( Rizzini & Mattos Filho 1968: 234) .

— Type: BRAZIL. Goiás, Cristalina , elev. 1350m, E.P. Heringer 11182 (holotype RB 132217!, isotypes HB!, K!, MG!, UB!)

= Stryphnodendron campestre Forero (1972:143) .—Type: BRAZIL. Goiás, “Serra dos Christaës”, 1818, Pohl 847 (holotype NY00003371 !, isotypes F!, MO!, W!).

Subshrubs 20–30(–35) cm tall, usually cespitose, bearing a well-developed, woody underground root-like system. Leaves with 5–7(–9) pairs of pinnae; (5–)6–10(–17) pairs of leaflets; rachis nectary 1, verruciform; blade chartaceous, margin glabrous, leaflets (4–)6–10(–13) × 3–7 mm, discolor, glabrous on both surfaces, unilateral tuft of trichomes on the lower surface absent. Inflorescences of simple thyrsi; cymulae of usually solitary spikes, sometimes geminate, vinaceous to reddish. Flowers monoclinous, purplish, pinkish or vinaceous. Fruit a follicule, straight to very rarely slightly curved, flat-compressed, (4.5–)5.5–7.5 × 1.5–2.2 cm, valves atrovinaceous to dark-brown ( Fig. 2D, E ).

Distribution and habitat: — Stryphnodendron cristalinae occurs in campo limpo, campo sujo, campo cerrado or in more open physiognomies of the cerrado, often associated with sandy or rocky soils. The species has a very restricted distribution, being known only in the municipality of Cristalina (Goiás state), from the Serra dos Cristais and sometimes reaching the limits of urban areas. The specimens collected at the Água Limpa farm (University of Brasília Experimental Station, Brasília, Federal District) were cultivated from seeds brought from Cristalina.

Conservation:—Endangered (EN B1ab(i,iii)+2ab(ii,iii) [AOO= 12.000 km 2, EOO= 1,021.914 km 2]. Only small populations of this taxon were found during recent expeditions to its area of occurrence, in extremely reduced areas bordered by soybean plantations. No records in conservation units were found.

Phenology: —This species was collected with flowers in March to May, and July to January. Specimens with fruits were collected in March, April and November.

Selected specimens examined: — BRAZIL. Goiás: Cristalina, ao longo da BR 050, 7 km ao sul do entroncamento com a BR 040, 20 September 2016, fl., R.C. Pires & M.F. Simon 100 ( CEN). Cristalina , Serra dos Cristais, 9 km by road S of Cristalina on road to Catalão, 4 April 1973, fr., W. R. Anderson et al. 8086 ( US).

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.