2 
THALA1IIFL0E.E. 
b. Leaves without stipules. 
5 . Fumarlace.e. Stamens 6, diadelphous. Fruit 1-celled. 
11. Poly g a laceae. Stamens 8, diadelphous. Fruit 2-celled. 
21. Balsaminace.e. Stamens 5; filaments distinct; anthers*cohering. 
Fruit 5-celled. 
7. Resedace.®. Stamens 10 or more, inserted on a glandular irregular 
disk. Fruit 1-celled, with three parietal placentas. 
1. Ranuncu laceae. Stamens numerous, without any conspicuous 
disk. Fruit of 1 — 5 foil icles, each with one sutural placenta. 
B. Flowers regular, or nearly so. 
a. Stamens 20 or more. 
1. Rantnculace/F.. Stamens distinct. Carpels 1 or more, sometimes 
cohering below, each with 1 style and 1 placenta. Leaves alter- 
nate. 
4. Papaveracea',. Sepals 2, caducous. Petals 4. Style 1. Pla- 
centas 2 or more. Leaves ■without stipules. 
3. Nymph.eace.e. Sepals 4 — 6. Petals numerous. Stamens distinct 
Style 1. Stigma rayed. Placentas several. 
8. Cistace.e. Sepals 3, twisted in aestivation, with usually 2 outtr 
ones. Petals 5, fugacious. Style 1. Placentas several. 
18. Hypericaceae. Sepals 5. Petals 5. Styles several (3 — 5). Leaves 
opposite, without stipules. 
17. Tiliack^s. Sepals 4 — 5, all in the same whorl and valvate in aesti- 
vation. Petals 4 — 5. Stamens distinct. Style 1. Placentas 
several. Leaves with stipules. 
1G. Malvaceae. Calyx valvate in aestivation. Petals 5. Stamens 
united into a column. Leaves with stipules. 
h. Stamens 12 or fewer. Calyx tubular. 
[67. Pujmbagixaceae. Stamens as few as the petals, opposite to them 
and attached to their claws. Styles 5. Ovary 1-celled, with 1 
ovule.] 
12. FrankeniacEjE. Stamens, if as few as the petals, alternate with 
and free from them. Style 1, 2 — 3-cleft. Ovules several, at- 
tached to 3 parietal placentas. 
14. Caryophyllace.e, § Silenk.e. Stamens twice as many as the 
petals. Styles 2 — 5. Ovules numerous, attached to a central or 
axile placenta. 
c. Stamens 12 or fewer. Calyx deeply divided, or sepals distinct. 
* Carpels several, distinct. 
1. Ranunculace.e. Carpels very numerous, in several rows. 
[35. Ckassulace.e. Carpels in a single row.] 
** Carpels in a single row, solitary or 2 — 5 combined. 
f Ovary 1-celled, with a free central placenta bearing 3 or more ovules. 
Anthers not opening by recurved valves. 
[33. P ortulacace,e. Sepals 2. Petals 5. 
34. Paronychiace.e. Sepals and petals 4 — 5. Leaves with stipules.] 
14. Caryophyllace-e, § Alslne.e. Sepals and petals 4 — 5. Leaves 
without stipules. 
