Zornia piurensis Mohlenbr., Webbia

Zeferino, Laís Couto, Lewis, Gwilym Peter, Pezzini, Flávia Fonseca & Fortuna-Perez, Ana Paula, 2025, A taxonomic synopsis of the genus Zornia J. F. Gmel. (Leguminosae: Papilionoideae) for the Neotropics, Acta Botanica Brasilica (e 20240197) 39, pp. 1-37 : 29

Zornia piurensis Mohlenbr., Webbia 16(1): 120. 1961.

Fig. S3

Type: PERU. Depto. Piura: Prov. Huancabamba: Serran , 2 April 1939, H.E Stork 11375 (holotype GH; isotypes F–0043455F !, K–000328087 !, MO–277460 !, UC–658225 !) .

Shrub to ca. 50 cm tall. Stems erect, branched, glabrous. Leaves with 2 leaflets, petiolate. Leaflets 12–45 × 2.8–14 mm, lanceolate, glabrous. Stipules elliptic, 3–5 veined. Inflorescences spiciform, axillary, 15 cm long. Bracteoles 9–12 × 3.7–7 mm, ovate, 5–7 veined, punctate, glabrous, green. Loment with 3–5 articles; articles 2–2.3 × 1.6–2 mm, reticulate-veined, bristle-like trichomes 1 mm long.

Distribution and habitat: Ecuador, Peru. It occurs in Montane Grassland and Tropical Dry Forest.

Conservation Status: Endangered (EN). Zornia piurensis has a limited geographical range, and it occupies a relatively small portion of its overall extent of occurrence (EOO= 616.869. 299 km ²; AOO= 32.000 km ²).

Notes: This species is distinguished by its glabrous, punctate leaflets and its ovate bracteoles.

Representative specimen examined: ECUADOR. Guayaquil : near the cement mill Guayas, 15 April 1939, Asplund 5711 (US); Galapagos Islands: Albemarle Island, Tagus Cove , 24 May 1932, Howell 9507 (US). PERU. Lambayeque: s.loc., s.d., Vidal-Senege s.n. (P).

Figures

Figure 3. Main preferred vegetation types of Zornia species.A. Campo rupestre vegetation, sandy soil, Savanna B. Cerrado vegetation, Savanna C. Roadsides D. Caatinga vegetation, Tropical Dry Forest E. Campo rupestre vegetation, Savanna F. Cerrado vegetation, Savanna G. Cattle pastures H. Caatinga vegetation, Tropical Dry Forest. (Photos A, B, C, E, F, G: L.C. Zeferino; D, H: F.F. Pezzini).