596 



INDEX. 



and its distribution in Terra Ans- 

 tralis, 11, 12 



Buxbaumia, character of the genus, 

 and observations on its structure 

 and affinities, 351 



Bywater, Mr., his microscopical ob- 

 servations referred to, 485-6 



Cadaba farinosa, observations on, 276 



CffisalpineBe, 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 fiflh segment 

 in reference to the axis of the 

 spike in Polygalese, Lobeliaoeae, 

 Leguminosse, and Rosaceue, 292 



Calyx and corolla, distinction between, 

 illustrated by Euthales and Velleia, 

 33 ; by Eranklandia, 81 



Canna Indioa, probably of American 

 origin, 158 



Cannese, structure of flower in, 49 



Capparideae belonging to the same 

 natural class as CrnciferEe, 272 ; 

 observations on the order and on 

 the species found in Central 

 Africa, 272—280 ; number of pla- 

 centae 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 Rhizophorese, 

 119 



Carex, structure of flower, 54 



Caryophyllese, species of, in the col- 

 lection from Central Africa, 285 



Cassava brought from America to the 

 banks of the Congo, 155 



Cassia, observations on the pliyllo- 

 dineous species of, 327, 339 ; and 

 on those with a single pair of cad- 

 ucous foliola, &c., ib. 



Cassuvise, observations on the order 

 and the species found in the vicinity 

 of the Congo, 112 



Casuariua, spiral vessels in the seeds 

 of, 46, 549 



Casuarinese, observations on the order, 

 and on its distribution in Terra 

 Australis, 45 



CedrelcEe not found in Africa, 151 



Celastrinse, 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 



Chailleteae, 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 



Chenopodese, how distinguished from 

 Urticeae, 138 ; and from Phyto- 

 laceoe, 139 



Chloris Melvilliana, 183 



Chrysobalane«, distinctive characters 

 of the order, enumeration of the 

 genera composing it, and observa- 

 tions 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 Yirginica, 

 5] 3 note. 



Cistinese found in Central Africa, 288 ; 

 difficulty regarding the mode of im- 

 pregnation 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 



Cocoinse, a very natural section of the 

 order Palmae, ] 41 



