1.

+

Seeds trigonous, tetrahedral with a thin ridge up to 0.1 mm wide

2

̶

Seeds discoid with a prominent encircling wing 0.15-1.2 mm wide

3 

2.

+

Bracts 3-15 mm; calyx lobes 2-8 (-13) mm; corolla 12-22 mm.

1. L. dalmatica

–

Bracts 8-20 mm; calyx lobes 9-18 mm; corolla (25-)35-40 (-45) mm.

2. L. grandiflora 

3.

+

Corolla mostly yellow sometimes tinged with red or reddish brown.

4

–

Corolla mostly purple, violet, pink or white tinged with violet nerves.

13 

4.

+

Calyx hairy.

5

–

Calyx glabrous.

10

5.

+

Annual with slender roots; adventitious roots or stolons absent.

3. L. simplex

–

Perennials, often with rootstock or adventitious roots or stolons.

6 

6.

+

Corolla 15-33 mm;  spur 9-15 mm.

4. L. vulgaris

–

Corolla 11-20(-24) mm, spur 3-10 mm.

7

7.

+

Leaves (18-)40-80 x (3-)5-10 mm, linear to linear lanceolate to oblong.

5. L. unaiensis

–

Leaves 10-40 x 0.5-2 mm, linear to filiform.

8 

8.

+

Stems decumbent to suberect, racemes dense, subcapitate; calyx lobes villous at least towards base.

6. L. lineolata

–

Stems erect or rarely ascending; racemes  lax or dense but not subcapitate; calyx lobes puberulent or ciliate.

9

9.

+

Corolla 11-17 mm, dull yellow with reddish purple or greenish brown nerves;  spur 3-8 mm, striaght, shorter than rest of corolla

 7. L. venosa 

–

Corolla 10-14 mm long, whitish yellow with prominent bluish purple nerves; spur 6-10 mm, straight or slightly curved; subequalling or shorter than rest of corolla.

  8. L. striatella

10.

+

Corolla 8-10(-21) mm; spur 4-6 mm.

9. L. odora

–

Corolla mostly > 10 mm long; spur > 6 mm

11

11.

+

Capsule glandular puberulent

11. L. fastigiata

–

Capsule glabrous

12

12.

+

Leaves filiform; calyx lobes linear-spatulate, with white scarious margins; corolla 13-22 mm; spur (6-)8-10 mm.

10. L. bamianica

Leaves linear or linear-lanceolate; calyx lobes lanceolate to oblong, with very narrow scarious mrgins; corolla 10-15 mm; spur 6-8 mm long.

12. L. hepatica