Herbs 20–50(–80) cm, sparsely pubescent. Stems decumbent, ascending, or suberect, usually branched from base. Leaves: stipules lanceolate, margins dentate; leaflet blades oblong to linear-oblong or -lanceolate, 10–30(–40) × 3–10(–20) mm, margins denticulate. Peduncles 2–6 cm. Inflorescences 20–30-flowered, glo­bose or subglobose to ovoid racemes, densely flowered but elongated to ± lax in fruit. Flowers 5.5–7 mm; calyx ca. 1/2 as long as corolla, lobes nearly equal to tube; corolla pale blue or lilac-blue. Legumes erect-spreading, ovoid, flattened, seed-bearing part 4.5–6 × 2–3 mm, tapering into subulate beak 2–3 mm. Seeds 1–3, brownish, oblong, 2.5 × 1 mm. 2n = 16.

Phenology: Flowering early–late summer.
Habitat: Waste ground, ballast.
Elevation: 0–1000 m.

Distribution

• Generated Map
• Legacy Map

Introduced; Pa., Eurasia.

Discussion

Trigonella caerulea (see discussion under that species) is thought to be a domesticated phase of T. procumbens. Although the two are generally recognized as different species, they could be combined into one species [as indicated by the combination T. caerulea subsp. procumbens (Besser) Thellung].

Selected References

None.

Lower Taxa

None.