Cercidoideae

Bastos, Maria Da Conceição De C., Marinho, Lucas C., Zappi, Daniela Cristina, Queiroz, Rubens Teixeira & Fernandes, Rozijane Santos, 2025, Leguminosae Juss. from Nascentes do Rio Parnaíba National Park, Brazilian Cerrado, Phytotaxa 693 (3), pp. 183-204 : 192-193

Subfamily Cercidoideae

10. Bauhinia gardneri Benth. (1870:186) .

Material examined:— BRASIL. Piauí: Barreiras do Piauí, Parque Nacional das Nascentes do Rio Parnaíba, trilha da Cachoeira do Urubu, 10°10’11’’ S, 45°48’38’’ W, 14 December 2022, M. C. C. Bastos et al. 60 ( CCAA, UB!).

Geographical distribution: Bauhinia gardneri occurs in Bolivia and Brazil ( POWO 2024). In Brazil, it has been cited only for the states of Goiás and Tocantins, occurring exclusively in the Cerrado ( Vaz 2020) . In this study, Bauhinia gardneri is reported for the first time in the state of Piauí and the Northeast region of Brazil. In the study area, it was collected in gallery forest ( Fig. 2 D ).

Note: Bauhinia gardneri ( Fig. 6 C ) can be recognized by its shrubby habit, glabrous branches, bilobed leaves with suborbicular lobes and a deeply cordate base, lanceolate stipules, brownish flowers, white linear petals, ten anthers, and glabrous linear fruit.

11. Bauhinia marginata (Bong.) Steud. (1840: 191) .

Material examined:— BRASIL. Piauí: Barreiras do Piauí, Parque Nacional das Nascentes do Rio Parnaíba, Acampamento do Curriola, 10°08’14’’ S, 45°53’22’’ W, 14 December 2022, M. C. C. Bastos et al. 58 ( CCAA, UB!).

Geographical distribution: Bauhinia marginata is endemic to Brazil, found in Mato Grosso, Mato Grosso do Sul, and São Paulo, within the Cerrado domain ( Vaz 2020; Flora e Funga do Brasil 2024). In the present study, the species was identified for the first time in the state of Piauí, marking the first record for the Northeast region of Brazil ( Fig. 4 B ). Bauhinia marginata was collected from a gallery forest ( Fig. 2 D ).

Note: Bauhinia marginata ( Fig. 6 D ) can be recognized by its subshrubby habit, bifoliolate leaves with broadelliptic to oblong leaflets, elevated veins on the edges, reduced spines with a widened base, and deeply keeled-winged floral buds. The flowers are green with white petals.

Figures

FIGURE 2: Plant physiognomies of Nascentes do Rio Paraníba National Park, Brazil. A: cerrado stricto sensu; B: cerradão; C: palm swamps; D: gallery forest; E: rocky cerrado; F: riparian forest. Photo credits: A, C, E—provided by Leticia Alves and Dennis Hyde, creators of the entreparquesbr project (website: https://entreparquesbr.com.br/); B, D, F—provided by the authors of this study.

FIGURE 4. New records of legumes in PNNRP, Brazil. A: Chamaecrista coradinii, new record for the states of Maranhão and Piauí; B: Chamaecrista dalbergiifolia, new record for the Northeast region. C: Chamaecrista hispidula, new record for the state of Tocantins.; D: Chamaecrista linearis, new record for the state of Maranhão. Photo credits: M.C.C. Bastos (A, B, D); D. C. Zappi (C).

FIGURE 6. New records of legumes in PNNRP, Brazil. A: Mimosa dolens, new record for Maranhão and the Northeast of Brazil; B: Bauhinia gardneri and B. marginata, new records for the Northeast region; C–D: Bauhinia marginata, new records for the Northeast region. Photo credits: M.C.C. Bastos (A) and D. C. Zappi (B,C).