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yellow bird's-foot, yellow serradela

Stems

10–50 cm.

Leaves

30–60 × 10–15 mm;

stipules linear, 1 mm;

leaflets 15–37, blades elliptical to oblong-lanceolate, leaflets of larger leaves 5–9 × 2–3 mm.

Peduncles

1.5–2 cm in flower, 4–6 cm in fruit.

Pedicels

0–1 mm.

Flowers

calyx 3.5–4.3 mm, lobes 1.2–1.8 mm, more than 1/2 tube length;

corolla yellow, 5–8 mm.

Heads

3–8-flowered, 7–10 mm diam.;

bract equaling or longer than flowers, 7–9-foliolate.

Seeds

2 × 1.5 mm.

Loments

weakly compressed, not or slightly constricted between seeds, 20–50 × 2–3 mm;

segments 5–8, oblong, 3.5–4 mm;

beaks ± curved, 3–7 mm.

2n

= 14.

Ornithopus compressus

Phenology Flowering late spring–early summer.
Habitat Disturbed open areas, waste places.
Elevation 10–30 m. (0–100 ft.)
Distribution
from FNA
OR; Europe; w Asia [Introduced in North America; introduced also in Australia]
[BONAP county map]
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Ornithopus
Sibling taxa
O. perpusillus, O. sativus
Name authority Linnaeus: Sp. Pl. 2: 744. (1753)
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