600 



INDEX. 



the more general arrangement, 292 ; 

 admits of many exceptions, ibid. 



Foramen of the testa infallibly indi- 

 cates the place of the future radicle, 

 264, 446 ; observed in Rafflesia, 

 406 ; in Hydnora, 407 



Franklandia, observations on the 

 genus, 81 



Tfaser, Charles, his report on the 

 botany of Swan Hiver, and collec- 

 tions formed there by him, 307, 338 



Fruits, indigenous fruits of Weatern 

 Africa, 155 



Fruits and seeds, on some remarkable 

 deviations from the usual struc- 

 ture of, 357 



Fuirena umbellata, identity of African 

 and American specimens, 169 



Gaudichaud, specimens of the caudex 

 of a species of XanthorrliOBa, 

 brought by him from Port Jackson, 

 439 



Genera, geographical distribution of, 

 a clue to the native country of 

 plants now generally dispersed, 

 149, 156 



Gentianese, only one species in the 

 collection from Central Africa, 295 ; 

 position of their carpels, 562 



Geraniacese found in Central Africa, 

 288 



Glands on the receptacle in several 

 genera of Cruciferse, their number 

 and position, 267 ; cutaneous (sto- 

 mata) found on both surfaces of t!ie 

 leaves and foliaceous footstalks of 

 the genus Eucalyptus, and of the 

 leafless Acacise, and assisting to 

 give a peculiar character to the 

 Australian forests, 312; generally 

 found on the under surface only, 

 ibid. ; rarely, as in several Coniferoe, 

 only on the upper, ibid. 



Gleichen, his description of the organs 

 and mode of fecundation in Ascle- 

 piadeae, 516-7. 



Gloriosa, observations on the genus 

 and on the identity of African and 

 Indian specimens, 170 



Glycine subterranea, probably of 

 African origin, 160 



Gnetum, the ovulum naked in, 453 ; 

 structure of the nucleus in, 455 



Goodenovise, observations on the 



order, and its distribution in Terra 

 Australis, 31 ; comparison w^ith 

 Lobelia, 32 ; pollen of, remains long 

 quiescent, 33, 575 



Gramiuese, observations on the order, 

 and its distribution 'in Terra Aus- 

 tralis, 54; proportion of the order 

 to Monocotyledons, ibid. ; subdi- 

 visible into two great tribes, 

 Poaceae and Panicese, 55-8; struc- 

 ture of the flower and analogy of its 

 parts, 55-6 ; further observations on 

 the order, and on its proportions and 

 geographical distribution, 145; on 

 the species found in the vicinity of 

 the Congo, 146 ; in Central Africa, 

 288, 300 ; proportion of the two 

 great divisions in the collection 

 from Central Africa, ibid. ; stigmata 

 of, 559 



Grammitis Ceterach, the only fern in 

 Mr. Ritchie's collection from the 

 neighbourhood of Tripoli, 303 



Griffith, William, his "attempt to 

 analyse Rhizantheai," 423 



Gulf-weed, on the origin and propaga- 

 tion of the, 577—582; whether 

 originally destitute of roots, 581; 

 existence of dots in, 583 



Gunn, Ronald, plants collected by, in 

 Van Diemen's Land, 338 



Habenaria bifolia, monstrosity of, un- 

 favorable to the theory of the 

 auriculae of the column representing 

 lateral stamina, 500; H. viridis, mu- 

 cous tubes inserted into the aperture 

 of ovulum in, 540 note. 



Haloragese, observations on the order 

 and on its distribution in Terra 

 Australis, 21 



Hibbertia volubilis, its arillus, 449 



Hibiscus tiliaceus, identity of speci- 

 mens from the Congo and from 

 India, 171 



Hippocraticese, observations on the 

 order and on the species found in 

 the vicinity of the Congo, 107 



Holcus, a cultivated species of, on the 

 banks of the Congo, probably indi- 

 genous, 160 



Homahnae, characters of the order, 

 and observations on the species 

 found in the vicinity of the Congo, 

 120 



