Papilionoideae

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 : 193-194

Subfamily Papilionoideae

13. Eriosema venulosum Benth. (1859: 211) .

Material examined:— BRASIL. Maranhão:Alto Parnaíba, Parque Nacional das Nascentes do Rio Parnaíba, Cachoeira do Sussuapara, 10°10’10” S, 45°55’27” W, 20 July 2023, D. C. Zappi et al. 5576 ( CCAA, UB!).

Geographical distribution: Eriosema venulosum is endemic to Brazil, distributed in the states of Bahia, Goiás, Pernambuco, Piauí, and Tocantins, occurring in the Caatinga and Cerrado domains ( Cândido et al. 2019). In the study area, the species was found in cerrado sensu stricto vegetation ( Fig. 2 A ), at the edge of the gallery forest. It is recorded herein for the first time in the state of Maranhão.

Note: Eriosema venulosum ( Fig. 7 B ) is characterized by its unifoliolate leaves with leathery leaflets and obtuse apices, branches with long white glandular trichomes, persistent narrow-triangular stipules, and terminal racemose inflorescences with yellow flowers.

14. Luetzelburgia bahiensis Yakovlev (1976: 75) .

Material examined:— BRASIL. Maranhão: Alto Parnaíba, Parque Nacional das Nascentes do Rio Parnaíba, estrada da casa do seu Merval, 9° 49’30” S, 46° 16’ 26” W, 20 July 2023, M. C. C. Bastos et al. 156 ( CCAA!).

Geographical distribution: Luetzelburgia bahiensis is endemic to Brazil. It is recorded in the states of Bahia, Pernambuco, and Piauí, occurring only in the Caatinga ( Cardoso et al. 2014, Flora e Funga do Brasil 2024). In the PNNRP, it was collected in a cerradão environment ( Fig. 2 B ), marking the first collection in the state of Maranhão. Previously, Luetzelburgia bahiensis was exclusive to the Caatinga phytogeographic domain ( Cardoso et al. 2014; Flora e Funga do Brasil 2024), and it is now being recorded as a new occurrence for the Brazilian Cerrado in this study.

Note: Luetzelburgia bahiensis ( Fig. 7 C ) can be recognized by its arboreal habit, glabrous leaves with three to seven rounded leaflets, pendulous panicles, spatulate white lateral petals, dialistemones stames, and samaroid legume fruit.

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 7. New records of legumes in PNNRP, Brazil. A: Copaifera coriacea, new record for Maranhão; B: Eriosema venulosum, new record for the state of Maranhão; C: Luetzelburgia bahiensis, new record for the state of Maranhão and for the Cerrado. Photo credits: M.C.C. Bastos (A, C) and D. C. Zappi (B).