(42) 



2. Alsine. — Sepals 5, unchanged in fruit. 

 Petals entire. Capsule dehiscent by 

 3 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. 



