(42) 
2. Alsine.—Sepals 5, unchanged in fruit. 
Petals entire. Capsule dehiscent by 
83 valves. Seeds reniform. 
3. Spergularia (Lepigonum). — Sepals 5. 
Petals entire. Capsule dehiscent by 3 
valves. Seeds compressed. Stipules 
membranaceous. 
4. Arenaria.—Sepals 5. Petals entire. 
Capsule dehiscent by 6 valves. Seeds 
reniform. 
5. Stellaria.—Sepals 5. Petals 2-cleft. 
Capsule dehiscent by 6 valves. 
6. Portulaca.—Corolla superior. Calyx 2- 
sepalous, deciduous. Petals 4-6. Cap- 
sule circumscissile. 
7. Calandrinia.—Corolla inferior. Calyx 
2-sepalous, persistent. Capsule 3- 
valved, oo-seeded. 
8. Whipplea.—Ovary 3-septate. Cells 1- 
ovulate. Capsule septicidal. 
IV. Tetragynia. 
1.—Sagina.—Sepals 4. Petals entire. Stig- 
mas alternate with the sepals. Capsule 
dehiscent by 4-5 valves. 
V. Pentagynia. 
1. Sagina.—Sepals 5. Petals entire. Stig- 
mas alternate with the sepals. Capsule 
dehiscent by 5 valves. Seeds reniform. 
Stipules 0. 
