In Tribe 5 of Bentham and Hooker, the sleep-movements of species in 12 genera have been observed by ourselves and others, but only in Robinia with any care. Psoralea acaulis raises its three leaflets at night; whilst Amorpha fruticosa,[12] Dalea alopecuroides, and Indigofera tinctoria depress them. Ducharte[13] states that Tephrosia caribaea is the sole example of “folioles couchées le long du pétiole et vers la base;” but a similar movement occurs, as we have already seen, and shall again see in other cases. Wistaria Sinensis, according to Royer,[14] “abaisse les folioles qui par une disposition bizarre sont inclinées dans la même feuille, les supérieures vers le sommet, les inférieures vers la base du petiole commun;” but the leaflets on a young plant observed by us in the greenhouse merely sank vertically downwards at night. The leaflets are raised in Sphaerophysa salsola, Colutea arborea, and Astragalus uliginosus, but are depressed, according to Linnæus, in Glycyrrhiza. The leaflets of Robinia pseudo-acacia likewise sink vertically down at night, but the petioles rise a little, viz., in one case 3°, and in another 4°. The circumnutating movements of a terminal leaflet on a rather old leaf were traced during two days, and were simple. The leaflet fell slowly, in a slightly zigzag line, from 8 A.M. to 5 P.M., and then more rapidly; by 7 A.M. on the following morning it had risen to its diurnal position. There was only one peculiarity in the movement, namely, that on both days there was a distinct though small oscillation up and down between 8.30 and 10 A.M., and this would probably have been more strongly pronounced if the leaf had been younger. [12] Ducharte, ‘Eléments de Botanique’, 1867, p. 349. [13] Ibid., p. 347. [14] ‘Ann. des Sciences Nats. Bot.’ (5th series), ix. 1868.