Page:Britishwildflowe00sowe.djvu/46

xxxiv

1. The only British genus.

1. The only British genus.

1. . All the branches spinous. Leaves minute. Calyx with 2 bracts at the base. Sepals nearly as long as the corolla. Standard bifid.

2. . Flowering branches not spinous. Calyx without bracts, much shorter than the corolla, 3-cleft. Standard entire.

3. . Calyx much shorter than the corolla, without bracts, 2-lipped, the lower lip with 3 teeth. Standard large, ovate. Pod flat.

4. . Calyx much shorter than the corolla, 5-cleft. Leaves simple or ternate.

5. . Calyx much shorter than the corolla, 5-cleft. Leaves pinnate.

6. . Pod sickle-shaped, or spirally curved. Leaves ternate.

7. . Pod nearly straight. Calyx-teeth 5, nearly equal. Keel blunt. Leaves ternate. Petals deciduous.

8. . Pod nearly straight. Calyx-teeth 5, unequal. Petals slightly connected, persistent; keel blunt. Leaves ternate.

9. . Pod nearly straight. Calyx-teeth nearly equal. Keel with a narrow point. Leaves ternate.

10. . Pod nearly 2-celled. Keel with a narrow point. Leaves pinnate.

11. . Pod nearly 2-celled. Keel obtuse. Leaves pinnate.

12. . Pod compressed, curved, jointed. Leaves pinnate.

13. . Pod compressed, formed of crescent-shaped joints. Leaves pinnate.

14. . Pod 1-seeded, toothed on the lower margin. Leaves pinnate.

15. . Pod 1-celled, many-seeded. Style filiform, hairy beneath the stigma. Leaves pinnate, with tendrils.

16.. Pod 1-celled, with several seeds. Stigma downy all over. Leaves pinnate, with tendrils.

17. . Pod 1-celled, many-seeded. Style flat, dilated upwards, downy in front. Leaves pinnate or simple, sometimes with tendrils.

19. . Pod 1-celled, many-seeded. Style compressed, keeled, somewhat triangular, downy above. Leaves pinnate, with tendrils.

20. . Pod 1-celled. Style flat, downy on the upper side. Leaves pinnate, without tendrils.

Order XXVI. ROSACÆ.

1. . Fruit a drupe. Ovary superior, of 1 carpel. Calyx deciduous.

2. . Fruit formed of several follicles, arranged in a ring upon the calyx-tube.

3. . Carpels with a feather-like awn. Disk flat.

4. . Carpels with a feather-like jointed awn. Disk elongated.

5. . Fruit formed of a number of drupes, in a simple calyx.

6. . Fruit formed of carpels on a fleshy receptacle, falling when ripe. Calyx double.

7. . Carpels on a spongy persistent receptacle. Calyx double. Petals smaller than the calyx.