Rhynchosia naineckensis Fortunato [Familia Fabaceae]

Descripción y datos generales

Publicación original

Fortunato. (1982). Darwiniana, 24, 497–498, fig..

Status

Nativa

Hábito

Enredadera

Descripción morfológica

Vine suffrutescent, twining, stems branched, pilose, indumentum white to light yellow, with yellow vesicular glands, but lacking bulbous-based trichomes. Stipules 2–3.1 × 0.5–1 mm, free, persistent, lanceolate, externally pilose with yellow vesicular glands, but lacking bulbous-based trichomes. Leaves trifoliolate; petiole 1–5.4 cm long; leaf rachis 1–2.1 cm long; stipels absent; leaflets 2,4–5.3 × 2–4.9 cm, ovate or deltoid to rhombic, surface not bullate, attenuate to acuminate at apex, obtuse or truncate at base, margin entire, pilose, with yellow vesicular glands on the abaxial surface. Inflorescence axillary, racemose, 2.7–3.5 cm long, bearing 6–9 flowers, not exceeding the length of the subtending leaf; bracts caducous; pedicels 1–1.5 mm long. Flowers 4–7 mm long excluding the pedicel; calyx 2–3.2 mm long, pubescent with yellow vesicular glands, but lacking bulbous-based trichomes, lobes lanceolate, not exceeding the corolla in length; standard petal 4–6 × 3–4.7 mm, orbicular, emarginate at apex, pilose to pubescent, with yellow vesicular glands, but lacking bulbous based trichomes, claw 1–1.5 mm long, auricle ca. 0.5 mm long; wing petals 4–5 × 1–2 mm, oblong, claw. 1.3–2 mm long, auricle ca. 0.5 mm long; keel petals 5–6 × 2–2.2 mm, falcate, claw ca. 1–2 mm long; stamens 5–5.5 mm long; ovary 2–3.3 mm long, pubescent, with yellow vesicular glands. Fruits 1.1–1.6 × 0.6–0.8 cm, reddish-brown to black, strongly constricted between the seeds, oblong, glabrescent, with yellow vesicular glands, but lacking bulbous-based trichomes. Seeds 4.7–5.5 × 3–4 mm, suborbicular, bicolored, black and red, the red confined to the hilar area.

Material tipo

Argentina. Formosa. Dpto. Pilcomayo. Laguna Naineck, ruta 86, km 1334 1/2; 31 Ago 1981, R. H. Fortunato, L. Cusato & C. C. Xifreda 57 (holotipo, BAB00000490; isotipo, SI002522).

Distribución

Distribución por país

Ilustraciones

Ejemplares de herbario

Referencias bibliográficas por País

Vouchers — Ejemplares examinados

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Estado de conservación