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Annual or monocarpic, shortly perennial herb, up to 80 cm high.. Stem branched from the base or unbranched, many-noded.. Leaves ovate-orbicular to subreniform, 4–25 mm long, 5–21 mm wide, obtuse to shortly apiculate, amplexicaul, cordate at the base, 5 distinct nerves beneath.. Inflorescences terminal, few-to many-flowered distinctly dichasial cymes; pedicels (1–)3.5–5 mm long; bracts broadly ovate to elliptic, acute.. Flowers 5-merous, orange-yellow.. Calyx lobes lanceolate to elliptic, 6.4–11.2 mm long, ± 6 mm wide, unequal, 3 wider and longer than remaining 2, acute, margin hyaline, calyx wings wider at or above the middle, shortly decurrent on pedicel with colleters at the base.. Corolla tube 5.6–6.8 mm long; lobes narrowly obovate to lanceolate, 5.5–6(–7) mm long, 2–3 mm wide, obtuse.. Filaments inserted in the sinuses of the corolla lobes, 1.3–2 mm long; anthers 1–1.8 mm long, with a minute stipitate apical gland, with or without two minute basal glands.. Ovary ellipsoid, 2–3.2 mm long, 1.5–1.8(–2) mm diameter; style 4–7 mm long, with or without a swelling just at the base or at the middle, the swelling placed 0.5–1.3 mm from the base of the style; stigma capitate or clavate, bilobed, 0.6 mm long, 0.3 mm diameter.. Capsule ellipsoid, 4.8 mm long, 2.5 mm wide.. Seeds numerous, 0.3–0.5 mm in length, surface with continuous ridge-like outgrowths.
Annual or perennial herb, 0.13-1.00 m high; branched from base or simple, stems 4-ridged. Leaves 6-25 x 7-30 mm, sessile, ovate to ovate-orbicular, upper leaves smaller. Flowers in terminal, many-flowered cymes, bracteate. Calyx: segments 5, lanceolate to elliptic; keel shortly winged. Corolla yellow; tube 3.25-7.00 mm long. Stamens inserted in corolla sinuses; anther tips recurved with apical glands and sometimes 2 basal glands. Ovary ellipsoid; style with or without swelling below middle or near base; stigma bilobed. Fruit an ellipsoid capsule. Seeds ellipsoid.
Annual or perennial herb, up to 1 m high. Stems erect or spreading. Leaves in many pairs scattered along stems; blade ovate to ovate-orbicular, up to 25 x 30 mm. Flowers: in dense corymbose, head-like cymes; filaments inserted in corolla sinuses; anthers with a small apical gland and sometimes 2 minute basal glands; style with large stigmatic swelling below middle or near base; corolla with tube 3.25-7.00 mm, keel wing up to 0.75 mm broad, yellow or rich yellow; Jul.-Jun.
A herb. It is erect and can grow for one or more years. It grows 60 cm high. The stems are slender and have 4 ridges. The leaves are almost round and do not have leaf stalks. There are 5 veins from the base. The flowers are in dense groups with many flowers at the ends of the shoots. They are bright yellow. The fruit is a narrowly oval capsule.
Flowers bright yellow to orange in terminal many flowered dichotomous cymes arranged corymbosely or in paniculate corymbose, subdense or dense cymes contracted into round, almost head-like, inflorescence when young, rarely solitary flower; pedicels 1–1.8 mm. long; bracts 2–3 mm. long, ovate lanceolate-elliptic acute, recurved.
Stamens inserted at the corolla-sinuses; filaments 1.75–2 mm. long; anthers 1–2.25 mm. long, oblong, with a minute apical gland and sometimes with 2 minute basal glands.
Calyx segments 4–7.5 x 1.5 mm., lanceolate, to elliptic, acute or acuminate, margin hyaline, with a keel shortly winged, wing broadest below or towards the middle.
Leaves sessile; lamina 6–25 x 7–30 mm. ovate, ovate-circular to subreniform, membranous or leathery, cordate at the base obtuse or shortly apiculate, 5-nerved.
Ovary ellipsoid; style 3.5–5 mm. long, with or without a swelling below the middle or near the base; stigma 1.5–2.5 mm., capitate or clavate, bilobed.
Corolla tube, (3.5) 4.5–7 mm. long; lobes 5–6.5 x 2.5–3.5 mm. obovate-oblong, obtuse at the apex.
Stem slender, unbranched or branched (sometimes from the base), 4-ridged.
Seeds 0.35–0.45 x 0.25–0.3 mm., ellipsoid; testa frilled.
Erect annual or perennial herb up to 60 cm. tall.
Capsule ellipsoid.
