Urine, action on Drosera, 79
Utricularia clandestina, 430 minor, 429
Utricularia montana, structure of bladders, 431 , animals caught by,
435 , absorption by, 437 , tubers of, serving as reservoirs, 439
Utricularia neglecta, structure of bladders, 397 , animals caught by,
405 , absorption by, 413 , summary on absorption, 421 , development
of bladders, 424
Utricularia, various species of, 441
Utricularia vulgaris, 428
V.
Veratrine, action on Drosera, 204
Vessels in leaves of Drosera, 247 of Dionaea, 314
Vogel, on effects of camphor on plants, 209
W.
Warming, Dr., on Drosera, 2, 6 , on roots of Utricularia, 397 , on
trichomes, 359 , on Genlisea, 446 , on parenchymatous cells in
tentacles of Drosera, 252
Water, drops of, not causing inflection in Drosera, 35 , its power in
causing aggregation in Drosera, 52 , its power in causing inflection
in Drosera, 139 and various solutions, effects of, on subsequent
action of ammonia, 213
Wilkinson, Rev., on Utricularia, 398
399