Arachis hypogaea L.

Annual herb, 30−80 cm tall; stems erect or decumbent. Leaves paripinnate, alternate, 4-foliolate; petioles 3.7−10 cm long; stipules membranous, apiculate, persistent and veined, linear-lanceolate, slightly falcate, apex acuminate, ciliate, 2−4 cm long; rachis up to 1 cm long. Leaflets opposite; petiolules 1−10 mm long; lamina obovate or elliptic, 1−7 by 0.7−3.2 cm, apex obtuse or emarginate and mucronate, base narrowly rounded, margin entire, glabrous or sparsely pilose beneath, ciliate. Flower axillary, reduced to a solitary flower or a cluster of flowers; pedicels 4−6 cm long, 8−13 mm long; bracts 10−14 by 4−5 mm, ovate-lanceolate, apex acuminate, base narrowly rounded; bracteole lanceolate, c. 5 mm long. Calyx filiform, pilose, up to 6 cm long; tube ca. 5 cm long; lobe ca. 1 cm long. Petals yellow with reddish lines; standard rounded, 8−12 mm long, apex emarginate, base shortly narrowed; wings oblong to obliquely ovate, slender, 7−10 mm long; keel long ovate, inflexed, apex acuminate to beaked, 7−10 mm long. Stamens 10−12 mm long, glabrous. Ovary oblong. Pods 2−6 by 1−1.5 cm; gynophores becoming 1−20 cm long. Seeds irregularly ovoid, 10−20 by 8−12 mm, reddish or light brown.