and its distribution in Terra Australis, 11, 12
Buxbaumia, character of the genus, and observations on its structure and affinities, 351
Bywater, Mr., his microscopical observations referred to, 485-6
Cadaba farinosa, observations on, 276
Cæsalpineæ, observations on the order and on its distribution in Terra Australis, 23; species found in the vicinity of the Congo, 110; in Central Africa, 294
Caley, George, plants collected by him in New South Wales, 6; species of Eucalyptus observed by him, 18
Calyx, position of the fifth segment in reference to the axis of the spike in Polygaleæ, Lobeliaceæ, Leguminosæ, and Rosaceæ, 292
Calyx and corolla, distinction between, illustrated by Euthales and Velleia, 33; by Franklandia, 81
Canna Indica, probably of American origin, 158
Canneæ, structure of flower in, 49
Capparideæ belonging to the same natural class as Cruciferæ, 272; observations on the order and on the species found in Central Africa, 272—280; number of placentæ in, 273
Capparis sodada, observations on, and on another species from Central Africa, 279, 280
Capsicum, arguments in favour of its American origin, 158
Carallia, why referred to Rhizophoreæ, 119
Carex, structure of flower, 54
Caryophylleæ, species of, in the collection from Central Africa, 285
Cassava brought from America to the banks of the Congo, 155
Cassia, observations on the phyllodineous species of, 327, 339; and on those with a single pair of caducous foliola, &c., ib.
Cassuviæ, observations on the order and the species found in the vicinity of the Congo, 112
Casuarina, spiral vessels in the seeds of, 46, 549
Casuarineæ, observations on the order, and on its distribution in Terra Australis, 45
Cedreleæ not found in Africa, 151
Celastrinæ, characters of the order and observations on its distribution in Terra Australis, 27
Centrophorum, a genus of grasses formed on an erroneous conception of its characters, 302
Ceropegia, spiral fibres in the hairs of the corolla in, 549
Chailleteæ, characters and affinities of the order, with observations on the species found in the vicinity of the Congo, 125
Chalaza, its function, 440; merely the termination of raphe, 450
Chenopodeæ, how distinguished from Urticeæ, 138; and from Phytolaceæ, 139
Chloris Melvilliana, 183
Chrysobalaneæ, distinctive characters of the order, enumeration of the genera composing it, and observations on the species found in the vicinity of the Congo, 115
Circulation in threads or currents in the cells of the jointed hairs of the filaments of Tradescantia Virginica, 513 note.
Cistineæ found in Central Africa, 288; difficulty regarding the mode of impregnation in, 453
Clapperton, Captain, plants collected by, in Central Africa, 257, 259, 303
Clarckia pulchella, form of particles within the grains of pollen in, 466-7; motions of the particles, ibid.
Cleome, observations on the genus, its subdivisions, and the species found in Central Africa, 273—276
Cleome (Gymnogonia) pentaphylla, regarded as a native of Africa and India, 275
Clianthus, observations on the New Holland species of, 321-2; on Clianthus Dampieri, ibid. and 339.
Cochlearia armoracia, monstrosities in, illustrating the origin of ovula, 563
Cocoinæ, a very natural section of the order Palmæ, 141
