INDEX. 



A.bclia, rcsupination of its perfect 

 ovula, 44S-9 



Abyssinia, list of new and rare plants 

 collected in, bv H. Salt, Esq., 91 ; 

 Flora of, has but little affinity to 

 that of the West Coast of Africa, 102 



Acacia, reason why the leafless species 

 of, form one of Ihe most striking 

 features of the vegetation of Terra 

 Australis, 2.'5, 02 ; species found in 

 the interior of New Holland, 339 



Acanthacea;, observations on the 

 species found in the vicinity of the 

 Congo, 134 



Acrostichuni aureuin, identity of Af- 

 rican and American specimens, 109 



Acrostichuni calomelauos and its allies, 

 the fine powder on their under 

 surface entirely composed of simple 

 molecules and their primary fibre- 

 like compounds, 473 



Acrostichuni velleum,the onlyAcotyle- 

 donous })lant in the collection from 

 Central Africa, 303 



Adanson, number of plants collected 

 by him in Senegal, 100 



Adhesion of the funiculus to the 

 septum as a generic character in 

 Crucifcrse, 202, 208 



iEstivation, form of, in Cleome penta- 

 phylla, Crateva and llesedaceaj, 273, 

 279 



Afzelius, Adam, number of s))ecies of 

 plants collected by him at Sierra ; 

 Leone, 101, ] 52 j 



Africa, Central, observations on plants 

 of, collected by Oudney, Denham, 

 and Clapperton, 257 



Agathis, origin of the ovulum in, 458 ; 

 analogy of male and female organs 

 in, 461 



Alhumen, how formed, 451-2; pecu- 

 liarities of, in various plants, 452 



Alsodeia includes Cerauthera,Passalia, 

 Conohoria, Rinorea, Riana, Passura, 

 Piparca, and Physiphora, j)robably 

 Pentaloba, and perhaps Lauradia, 

 123-4 



Alsoilinse, a section of Violea^, 123 



Anniios, how developed, 451 



Aniygdalese, a distinct order of the 

 class Rosacere, 115 



Amyrideae, observations on the order, 

 and on the species found in the 

 vicinity of the Congo, 112 



Anona Seuegalensis, a very general 

 plant along the whole of the West 

 Coast of Africa, 153 



Anonaceae, Eupomatia referred to, 74 ; 

 observations on the species found 

 in the vicinity of the Congo, 105 



Anthcrae and Pistilla, analogy of com- 

 position in, 378 — 380 noie ; proved 

 by the transformation of one into 

 the other in eases of monstrosity, 

 379 fiote ; differences in vascularity, 

 &c., between the two organs, ibid. 



Anthera of KafHesia, structure of, 

 377 — 383 ; princii)al forms of, iu 

 Phfcnogamous plants, 378 — 381 ; 

 supposed regular type, 378 ; prin- 

 cipal deviations from. 379 — 381 ; 

 reduced development in many La- 

 biate, in EpacridcjT, Polygalerc, 

 some genera of Acanthacra\ Wcst- 

 ringia, Anisomelcs, and Marantcx, 

 380; increased development in 

 many Scitamineie, Orchidcre, and 

 Laurinea\ and in yEgiccras, ibid. ; 

 reduced and increased development 

 coexisting iu the same orean, as in 

 the greater number of Salviac. and 

 38 



