26 
Thirteenth class. 
5. 
6 . 
9. 
10 . 
Seps 2 (decid.). Pets 4 ...... 6 
Seps 3—5. Pets 4—6 ...... S 
Caps, globular, obovate or clavate, with 5—20 incom¬ 
plete cells opening by as many holes, arranged in a 
circle under the 5—20-rayed stigmatic disk Papaver. 25. 
— Caps, elongated, linear (in the form of a siliqua), 2- 
valved. Stig. 2-lobed ...... 7 
7. FIs solitary, large ..... Glaucium. 26. 
— FIs umbelled, smaller . . Clieledonium. 27. 
8 (5). Ls 2-ternatisect . ... Actea. 19. 
— Ls undiv. ........ ,9 
Trees. Common peduncle united to a net-veined bract. 
Lime ....... Tilia. 117. 
Herbs or small shrubs ...... 10 
Caps. 3-valved. Style distinct . Helianthemum. 83. 
— Caps. 5-valved. Style almost 0 . . Cistus. 82. 
11 (1). FIs irreg. ........ 12 
— FIs reg. ......... 13 
12. The upper sep. spurred .... Delphinium. 17. 
— The upper sep. in the form of a casque Aconitum. 18. 
13. Ls opp. . .. 11 
— Ls altern., wliorled or radical .... 15 
Pets numerous. FIs solitary. Ls 2-ternate Atragene. 2. 
Pets 0. FIs in a panicle. Ls pinnate . Clematis. 1. 
Pets all prolonged to a spur below. Ls 2-ternate 
Aquiiegia. 16. 
Pets not prolonged to a spur .... 16 
Floral envelope simple (a petaloid calyx) . . 17 
— Floral envelope double, the inner circle (the petals) 
often very small ....... 10 
17. Stem with 3 whorled ls, otherwise leafless. Gen. spring fls 
Anemone. 4. 
— Stem with altern. ls, rarely leafless . . . 18 
18. Fls small, numerous. Ls several times divided 
14 
15 
16. 
Thalictrum. 3. 
— Fls large, solitary. Ls undivided . . . Caltha. 10. 
19 (16). Pets small, of a peculiar form, nectariform 20 
— Pets normal, as large or larger than the seps . 21 
20. Seps 6—several. (Fls yellow) .... 21 
— Seps 5. 22 
21. Seps numerous. Pets flat, resembling stas Trollius. 11. 
— Seps 6. Pets tubular .... Eranthis. 12. 
22. Fls blue or whitish. Carps united at the base or up to 
the centre. Nigella. 15. 
— Fls never blue. Carps free or united only at the base 23 
23. Pets unilabiate. Ls 2-ternate . . Isopyrum. 14. 
— Pets bilabiate. Ls pedate, with 7—12 segments 
Helleborus. 13. 
