7. Agrostemma. Capsule opening at the apex. Styles 5. Petals without appendage. Calyx-teeth long and linear.
** Sepals distinct.
8. Buffonia. Sepals 4. Petals 4. Stamens 4. Capsule opening by 2 valves.
9. Sagina. Styles as many as the sepals, and opposite to them, 4-5. Capsule opening by an equal number of valves. Petals minute.
10.Mœnchia. Sepals 4. Petals 4, entire. Stamens 4. Styles 3. Capsule opening by 8 valves or teeth.
11. Holosteum. Sepals 5. Petals 5, indented at the end. Capsule opening at the apex with 6 teeth. Styles 3.
12. Spergula. Sepals 5. Petals 5. Styles 5, alternating with the sepals.
13. Stellaria. Sepals 6. Petals 5, bifid. Styles 3. Capsule opening by 6 valves or teeth.
14. Arenaria. Sepals 5. Petals 5, entire. Styles 3 or 5, and opposite the sepals.
15. Cerastium. Sepals 5. Petals 5, bifid. Capsule opening with 10 teeth. Styles 3-5.
16. Cherleria. Sepals 5. Petals very minute or wanting. Styles 3. Capsule opening by 3 valves.
Order XIV. LINACÆ.
1. Linum. Petals and stamens 5.
2.Radiola. Petals and stamens 4.
Order XV. MALVACEÆ.
1. Lavatera. Involucrum 3-cleft.
2. Malva. Involucrum of 3 distinct bracts.
3. Althæa. Involucrum 6-9-cleft.
Order XVI. TILIACÆ.
1. Tilia. The only British genus.
Order XVII. HYPERICEÆ.
1. Hypericum. Stamens many, united into 3 or 4 groups at the base. Flowers yellow.
2. Parnassia. Stamens 5, perigynous, with 5 fringed nectaries between. Flowers white.
Order XVIII. ACERACEÆ.
1.Acer. The only British genus.
Order XIX. GERANIACEÆ.
1. Geranium. Fruit with a long recurved awn.
2. Erodium. Fruit with a long spiral awn.
Order XX. BALSAMINACEÆ.
1. Impatiens. The only British genus.
Order XXI. OXALIDACEÆ.
1. Oxalis. The only British genus.
Order XXII. STAPHYLEACEÆ.
1. Staphylea. The only British genus.
