Syrmatium decumbens (Benth.) Greene

Perennial, Herbs, Taproot present, Nodules present, Stems prostrate, trailing, or mat forming, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate , Leaves petiolate, Stipules inconspicuous, absent, or caducous, Stipules persistent, Stipules free, Stipules reduced to glands, Leaves compound, Leaves palmately 5-11 foliate, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets alternate or subopposite, Leaflets 5-9, Leaves glabrous or nearly so, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescence umbel-like or subumbellate, Inflorescence axillary, Bracts conspicuously present, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals red, Petals orange or yellow, Petals bicolored or with red, purple or yellow streaks or spots, Banner petal ovoid or obovate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens or anthers dimorphic, alternating large and small, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, St yle persistent in fruit, Fruit a legume, Fruit unilocular, Fruit indehiscent, Fruit elongate, straight, Fruit strongly curved, falcate, bent, or lunate, Fruit or valves persistent on stem, Fruit coriaceous or becoming woody, Fruit exserted from calyx, Fruit internally septate between the seeds, Valves twisting or coiling after dehiscence, Fruit beaked, Fruit glabrous or glabrate, Fruit 1-seeded, Fruit 2-seeded, Seeds reniform, Seed surface smooth, Seeds olive, brown, or black.

Acmispon decumbens is a species of flowering plant in the family Fabaceae, native to the western United States (Nevada, California) and north-western Mexico (Baja California). It was first described by George Bentham in 1836 as Hosackia decumbens.

It grows in several types of habitat, including mountain forest and meadows. It is a spreading or mat-forming perennial herb coated in long hairs. It is lined with leaves each made up of small green oval leaflets. The inflorescence bears up 12 pinkish yellow pealike flowers each a centimeter long or more. The fruit is a slender, bent, beaked legume pod.