Galactia marginalis Benth.

Perennial, Herbs, Plants with rhizomes or suckers, Taproot present, Nodules present, Stems erect or ascending, Stems less than 1 m tall, Plants with milky latex, Stems solid, Stems or young twi gs glabrous or sparsely glabrate, Leaves alternate, Leaves petiolate, Stipules inconspicuous, absent, or caducous, Stipules green, triangulate to lanceolate or foliaceous, Stipules deciduous, Stipules free, Leaves simple, or appearing so, Leaves pinnately 3-foliolate, Leaf or leaflet margins entire, Leaflets opposite, Stipels present at base of leaflets, Leaflets 1, Leaves glabrous or nearly so, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescence axillary, Bracts very small, absent or caducous, Bracteoles present, Flowers zygomorphic, Calyx 4-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals blue, lavander to purple, or violet, Banner petal ovoid or obovate, Wing petals narrow, oblanceolate to oblong, Keel tips obtuse or rounded, not beaked, Keel petals fused on sides or at tip, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit freely deh iscent, Fruit elongate, straight, Fruit exserted from calyx, Fruit internally septate between the seeds, Valves twisting or coiling after dehiscence, Fruit beaked, Fruit hairy, Fruit 3-10 seeded, Seeds reniform, Seed surface smooth, Seeds olive, brown, or black.

La flor de niño​ (Collaea argentina) es una especie de árbol leguminosa de la subfamilia Faboideae.

Se halla endémica en Argentina, Bolivia, Brasil, Paraguay y Uruguay.

Está amenazado por pérdida de hábitat.

Tiene hojas de 5-7,5 cm de largo y 1–2 cm de ancho, peciolo común de 5 mm de largo, pedicelos 1 cm de largo, pétalos de 25 mm de largo.

Galactia marginalis là một loài thực vật có hoa trong họ Đậu. Loài này được Benth. miêu tả khoa học đầu tiên.