Arapatiella psilophylla var. emarginata A. T. Novaes, M. J. Falc
Creators: name: Rodrigues, Ana Tereza Novaes Parga
name: Falcão, Marcus José De Azevedo
name: Mansano, Vidal De Freitas
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Arapatiella
Arapatiella psilophylla
Arapatiella psilophylla (harms) r. s. cowan var. emarginata (cowan) a. t. novaes, m. j. falc

description: Arapatiella psilophylla (Harms) R. S. Cowan var. emarginata (Cowan) A. T. Novaes, M. J. Falc ã o & Mansano.
(Figures 1, 3)
≡ Arapatiella emarginata Cowan, Brittonia 33(1):11. (1981). Type:— BRAZIL, Bahia. VIII-1971. R. S. Pinheiro 1548 CEPEC barcode CEPEC00007499 (Holotype: CEPEC!; isotype: US).
Trees 10 – 25 m × 7.5 – 40 cm. Leaf rachis 7.5 – 20 cm long, glabrous; petioles 3.5 – 17.5 cm long, glabrous; petiolules 5 – 8 mm long, glabrous; Proximal leaflets 7 – 23.5 × 3 – 9 cm, distal leaflets 7 – 30.5 × 3 – 9.6 cm, oblong to rotund, apex emarginate to retuse, sometimes truncate to obtuse, rarely cuspidate, glabrous; stipules 1.1 – 10.5 × 1 – 11.5 cm, glabrous. Inflorescences 20 – 30 cm long, rachis lax, densely strigulate, indumentum dark brown to reddish brown, bracts 1.5 – 7.5 × 1.7 – 9.3 cm, bracteoles 5 × 5 mm. Floral buds up to 1.7 cm long; pedicel 8 – 22 mm long; hypanthium 5 – 8 mm long, sepals 7 – 11 × 5 – 11 mm, brown, indumentum dark brown to reddish brown, petals 13 – 18 × 9 – 12 mm long, filament 12 – 24 mm long, anther 4 – 6 × 1.5 – 2 mm, ovary 9 – 11 × 4 mm, indumentum coppery to dark brown, style 12 mm long, stipe 5 mm long. Fruits puberulent, indumentum brown to dark brown, less dense than in var. psilophylla, apex acute to rounded, fruit 45 × 3.5 cm.
Diagnosis: —The apex emarginate to retuse to truncate is the most easily distinguishable feature of A. psilophylla var. emarginata. Stipules, flowers and inflorescences bigger; color of inflorescence indumentum darker, generally dark brown to reddish brown; rachis and petioles thicker; leaves subcoriaceous and with glossy surface.
Distribution and habitat: —The reduced distribution of A. psilophylla var. emarginata has only two principal localities of occurrence: the municipalities of Una and Uruçuca and its surroundings. There is an occurrence for humid forest environments as dense ombrophilous forests, but also to Restingas. The substrate type is sandy soil. (Figure 4).
Phenology: —Among the few specimens available, flowering occurred in April, August, and September. There are only two specimens in fruit collected in October and November.
Etymology: —The term emarginata refers to the apex present in specimens of the variety in contrast to the marked acuminate or cuspidate apex of the var. psilophylla.
Examined specimens: — BRAZIL: Bahia: Una, Reserva Biológica do Mico-Le ã o, entrada no km 46 da rod. BA-001 Ilhéus/Una, 15º09’S 39º05’W. Árvore, 15 m, 9-XI-1993, Amorim, A. M. A. 1402 (CEPEC, MBM, NY); 12-X-1995, Amorim, A. M. A. 1734 (CEPEC); estaç ã o da EMBRAPA (EDJAB), km 50 da rod. Ilhéus/Una. Árvore, 20 m, 15- IX-1993, Jardim, J. G. 294 (CEPEC, K, MBM, MO, NY, RB, SP, US); Km 5 a 15 da rod. Una para Olivença. Árvore, 10 m, 11-IX-1973, Pinheiro, R. S. 2254 (CEPEC, US); 2014, Rocha, s.n. ALCB117540 (ALCB); Fazenda Alagoinhas, 13-IX-1969, Monteiro, M. T. 23085 (HST); Uruçuca: Fazenda Lagoa do Conjunto Fazenda Santa Cruz, 7, 4 km a norte de Serra Grande na estrada para Itacaré, 14º25’24’’S 39º03’38’’W. Árvore, 24, 5 m, 24-IV-1995, Thomas, W. W. 10913 (CEPEC, NY, K, UESC); Árvore, 24, 5 m, VII-1991, Thomas, W. W. 8167 (CEPEC).
description: Published as part of Rodrigues, Ana Tereza Novaes Parga, Falcão, Marcus José De Azevedo & Mansano, Vidal De Freitas, 2023, A Taxonomic Revision of Arapatiella (Fabaceae: Caesalpinioideae): An Endemic and Threatened Genus from the Brazilian Coast, pp. 273-286 in Phytotaxa 606 (4) on pages 283-284, DOI: 10.11646/phytotaxa.606.4.3, http://zenodo.org/record/8202764