Perennial herbs, subshrubs, or shrubs, twining or rarely erect. Leaves pinnately (1-)3-9-foliolate; stipules linear, small; stipels small or absent. Inflorescence axillary, racemose, solitary, paired, or clustered. Bracts styliform or linear. Calyx membranous, cam­panulate, sometimes cylindric-campanulate, 5-lobed; lobes subequal, all shorter than tube, upper 2 ± connate. Corolla longer than calyx; standard pandurate, sometimes reniform, ovate-oblong, or almost circular, silky hairy outside, base acuminate to wide and short stipe; wings usually narrowly elliptic, with stipe and auricles; keels oblong or obovate, equal to or shorter than wings. Stamens diadelphous; vexillary stamen free; anthers uniform. Ovary subsessile; ovules 2-8; style thick; stigma small, capitate. Legume oblong or linear-oblong, dehiscent, oblate, margins slightly thickened, 2-5-seeded. Seeds oblong-ovate, smooth; hilum short, central; aril spongy, with strophiole.

Source: [
• 7
]. 

Calyx 5-lobed, the lobes subequal, the upper pair free or joined for ± two-thirds of their length.

Source: [
• 5
]. 

Standard violin-shaped or elliptic to rounded-oblong, without appendages or auricles, sometimes spurred at lower corners of the blade, with silky or bristly hairs outside; wings spurred or not.

Source: [
• 5
]. 

Leaves digitately or pinnately 3–7-foliolate or 1-foliolate; stipules linear, small; stipels minute or absent.

Source: [
• 5
]. 

Flowers in slender to thick axillary false racemes or almost sessile axillary clusters, paired to fasciculate on the rhachis.

Source: [
• 5
]. 

Pods oblong or linear-oblong, compressed.

Source: [
• 5
]. 

Seeds oblong-ovoid; hilum short, central; rim aril developed, cartilaginous, with a scale-like extension.

Source: [
• 5
]. 

Vexillary stamen free or lightly joined to the others; filaments alternatively long and rather shorter; anthers ± uniform.

Source: [
• 5
]. 

Ovary subsessile; ovules 2–8; style rather short, cylindrical, flattened or falcate and narrowed and pointed above, curved or almost hooked, glabrous, hairy along one side and at base or hairy all over; stigma small.

Source: [
• 5
]. 

Climbing or more rarely suberect herbs.

Source: [
• 5
]. 

Flowers in slender to thick axillary false racemes or almost sessile axillary clusters, paired to fasciculate on the rhachis

Source: [
• 6
]. 

Leaves digitately or pinnately 3–7-foliolate or unifoliolate; stipules linear, small; stipels minute or absent

Source: [
• 6
]. 

Standard violin-shaped or elliptic to rounded-oblong, without appendages or auricles, sometimes spurred at lower corners of blade, with silky or bristly hairs outside; wings spurred or not

Source: [
• 6
]. 

Calyx 5-lobed, the lobes subequal, the upper pair free or joined for ± two-thirds of their length

Source: [
• 6
]. 

Ovary subsessile; ovules 2–8; style rather short, cylindrical, flattened or falcate and narrowed and pointed above, curved or almost hooked, glabrous, hairy along one side and at base or hairy all over; stigma small

Source: [
• 6
]. 

Vexillary stamen free or lightly joined to the others; filaments alternatively long and rather shorter; anthers ± uniform

Source: [
• 6
]. 

Seeds oblong-ovoid; hilum short, central; rim-aril developed, cartilaginous, with a scale-like extension.

Source: [
• 6
]. 

Pods oblong or linear-oblong, compressed

Source: [
• 6
]. 

Climbing or more rarely suberect herbs

Source: [
• 6
].