Oxalis acetosella.-Thepeduncles are furnished with a joint in

Oxalis acetosella: A, leaf seen from vertically above; B, diagram of leaf asleep, also seen from vertically above.

The capsules of Cyclamen and of Oxalis acetosella are only occasionally buried, and this only beneath dead leaves or moss.

Oxalis acetosella: circumnutation of leaflet when asleep; traced on vertical glass during 3 h. 40 m.

Oxalis acetosella.-Themovement of a leaflet, together with that of the main petiole, are shown in the following diagram (Fig.