Lathyrus montanus, Bernh.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 140

19. L. montanus Bernh. , Syst. Verz. Erfurt 247 (1800)

(£. macrorrhizus Wimmer). Glabrous or subglabrous perennial; stem 15-50 cm, winged. Leaves without tendril; leaflets (1—)2—4 pairs, 10-50(-100) x 1—12(—16) mm, linear to elliptical; stipules 5-25 x 2-8 mm, linear or lanceolate, semi-sagittate. Racemes 2- to 6- flowered. Calyx-teeth unequal; corolla 10-16 mm, crimson, becoming bluish. Legume 25-45 x 4-5 mm, red-brown, glabrous. Seeds 4-10, smooth; hilum j —| of the circumference. 2n = 14. S., W. & C. Europe, extending to the Baltic region and White Russia. Al Au Be Br Co Cz Da Fe Ga Ge Hb He Ho Hs Hu It Ju Lu No Po Rs (B, C) Su.

20-22. L. pratensis group. Glabrous or pubescent perennial; stem not winged. Leaflets usually 1 pair; stipules sagittate. Racemes 2- to 12-flowered. Calyx-teeth unequal; corolla 10- 20 mm, yellow. Legume 20-40 x 4-7 mm, black, glabrous or pubescent. Seeds 5-12, smooth; hilum y -f of the circumference.

1 Leaves mucronate or with a very short simple tendril 21. binatus

1 At least the upper leaves with a distinct tendril

2 Lower calyx-teeth slightly shorter than tube 20. pratensis

2 Lower calyx-teeth as long as or longer than tube

3 Leaflets 2-9 mm wide, linear-lanceolate to lanceolate; stipules smaller than leaflets 20. pratensis

3Leaflets 8-15 mm wide, ovate; stipules as large as or larger than leaflets 22. hallersteinii