Twelfth, thirteenth class. 
25 
12 . 
13 
14 
15. 
16 
17. 
18. 
19. 
20 . 
21 
22 . 
23. 
Fr. a pear-like drupe (with bony endocarp). Spiny shrubs 
with large stipules. Medlar . . . Mespilus. 177. 
Fr. containing pips (endocarp thin or cartilaginous) 13 
. Corymb simple, with few fls. (Ls undiy.) Pyrus. 180. 
Corymb branched, with numerous fls Sorbus. 181. 
(4). Several follicles opening on the inner side. Perenn. 
pis with div. ls, or shrubs with simple ls Spiraea. 164. 
- Fr. a 1-seeded drupe. Trees or shrubs with undiv. ls. 
Amygdalacece ........ 15 
Stone marked with small holes. Fls rose (or white), 
almost sessile .... Amygdalus. 161. 
Stone smooth or furrowed, but not marked with holes. 
Prunus. 163. 
17 
Fls white, gen. distinctly peduncled 
(1). Cal.-lobes twice as many as the pets 
Cal.-lobes equal in number to the pets . . 21 
Styles terminal, persist. (Fr. awned) . . . 18 
Styles more or less lateral, decid. . . . 19 
Style (awn of the fr.) articulate. Stem bearing several fls 
Geum. 166. 
Style not articulate. Stem 1-fld (fl. yellow) Sieversia. 167. 
Fr. receptacle succulent when mature, detaching itself 
from the calyx. Ls ternate. Strawberry Fragaria. 169. 
Receptacle not detaching itself from the calyx 20 
Petspersist.,lanceol., darkpurple. Marsh pis Comarum. 170. 
Pets decid., rounded, obcordate or oval, yellow, white, 
or rose-coloured. Potentilla. 171. 
(16). Cal.-lobes (and pets) 8—9. Ls simple, undiv. 
Dryas. 165. 
Cal.-lobes 5. Ls divided or compound . , . . 22 
Carps dehiscent, 2—several-seeded. Ls interruptedly 
pinnatisect. Spiraea. 164. 
Carps indehisc., 1-seeded. Ls digitate or pinnate 23 
Carps enclosed in the cal. tube, which has become fleshy 
and narrowed at the throat (appearing like an inf. ovary) 
Rosa. 174. 
Carps on a flat or swollen receptacle, appearing like a 
false berry. Rubus. 168. 
Cl. 13. Polyandria. 
1. Style 1 or 0. 2 
— Styles 2—several. (Ranunculacece ) . . . .11 
2. Fls spurred, blue. Delphinium. 17. 
— Fls not spurred .. 3 
3. Pets numerous. AVater pis with large floating ls . dL 
— Pets 4—5. 5 
4. Seps 4. Pets white.Nymphaea. 23. 
— Seps 5. Pets yellow .... Nuphar. 24. 
4 
