Lathyrus pannonicus, (Jacq.) Garcke

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 : 139

15. L. pannonicus (Jacq.) Garcke , Fl. Nord-Mittel-Deutschl. ed. 6, 112 (1863)

(L. albus (L. fil.) Kittel ).

Glabrous or sparsely pubescent perennial; stem 15-50 cm, not or very narrowly winged; roots tuberous, fleshy. Leaves without tendril; leaflets 1-4 pairs, 15-75 x 2-5(-8) mm, linear to oblong-lanceolate or oblong-elliptical; stipules 10-20x 1-2-5 mm, linear-lanceolate, semi-sagittate. Racemes 3- to 9-flowered. Calyx glabrous or ciliate on the margin, the teeth unequal; corolla 12-20 mm, pale cream with reddish cr purplish tinge; style filiform. Legume 30-65x3-8 mm, pale brown, glabrous. Seeds 12-20, smooth; hilum I of the circumference. 2n= 14. From C. Spain, S. Italy and S.E. Russia northwards to N. W. France and to 54° N. in C. Russia. Al Au Bu Cz Ga Ge Hs Hu It Ju Po Rm Rs (C, W, K, E). A variable species that has been variously divided into varieties and subspecies or even separate species. There is no general agreement as to the number of taxa that can be recognized. The fullest account is given by Sirjaev, Bull. Assoc. Russe Sci. Prague (Sci. Nat. Math.) 5: 239-261 (1937), who recognized 6 varieties in Europe. Bässler, Feddes Repert. 72: 89 (1966), gives a list of 6 subspecies from Europe, without any explanation, which differs somewhat from Sirjaev’s treatment, a modification of which is given here. 1 Lowest calyx-tooth about as long as or longer than tube; stem usually very narrowly winged near the apex (e) subsp. varius 1 Lowest calyx-tooth shorter than tube (sometimes only slightly shorter); stem not winged

2Leaflets 15-30 x 4-7 mm, oblong-lanceolate or oblongelliptical (d) subsp. hispanicus 2 Leaflets 35-75 x 2-6(-7) mm, linear or linear-lanceolate or linear-elliptical

3 Peduncles shorter than or about as long as the subtending leaf; calyx-teeth usually glabrous, the lowest as long as the tube (b) subsp. collinus 3 Peduncles usually exceeding the subtending leaf; calyx-teeth usually ciliate, the lowest usually not more than | as long as the tube

4 Tubers 2-5 cm, oblong-ovoid (a) subsp. pannonicus 4 Tubers mostly 10 cm or more, slender or fusiform

(c) subsp. asphodeloides