Pisum sativum

Glabrous, glaucous annual, stems 10-200 cm, often climbing. Leaflets 1-4-paired, entire or dentate; stipules 1,5-8 cm long, obliquely ovate, dentate at least below, rounded and semi-amplexicaul at base; tendrils branched. Peduncle ¼-4 xas long as the stipules, 1-3-flowered, with or without a short awn, usually larger than the leaflets. Flowers 16-30 mm, with a broad lilac standard and darker reddish-purple wings, or flowers white. Calyx 8-15 mm; teeth subequal, longer than tube, ovate-lanceolate, ± acuminate, herbaceous. Legume oblong-linear or linear, 40-70 x 7-17 mm; seeds 3-10, at least 5 mm diam., testa densely papillose, or smooth or wrinkled. FI. 4-5. 1. Seeds densely papillose; peduncles ¼-4 x as long as stipules; flowers bicoloured; legumes 7-12 mm broad ............subsp. elatius 2. Flowers 20-30 mm; legumes 55-70 x 9-12 mm; leaflets 2-4-paired, ovate-elliptic, entire or subdentate; stems 30-200 cm 3. Peduncles 1-2-flowered, 2-4 x as long as stipules; leaflets 3-4-paired; stems 60-200 cm; flowers 25-30 mm ....var. elatius 3. Peduncles 1-flowered, ¼-1 xas long as stipules; leaflets 2-paired; stems 30-60 cm; flowers c. 20-22 mm .......... var. brevipedunculatum 2. Flowers 15-18 mm; legumes 40-45 x 7-8 mm; leaflets 1-3-paired, elliptic or elliptic-obovate, usually ± dentate; stems 10-30 cm, more slender ...var. pumilio 1. Seeds not papillose, but smooth or wrinkled; peduncle 1/2-2 x as long as stipules; flowers white or bicoloured; legumes 12-17 mm broad ............subsp. sativum 4. Flowers bicoloured; stipules with a reddish spot; seeds 4-8 mm, often angled and blotched ...............var. arvense 4. Flowers white; stipules without a reddish blotch; seeds usually larger, globose and unblotehed ...........var. sativum