the more general arrangement, 292; admits of many exceptions, ibid.
Foramen of the testa infallibly indicates the place of the future radicle, 264, 446; observed in Rafflesia, 406; in Hydnora, 407
Franklandia, observations on the genus, 81
Fraser, Charles, his report on the botany of Swan River, and collections formed there by him, 307, 338
Fruits, indigenous fruits of Western Africa, 155
Fruits and seeds, on some remarkable deviations from the usual structure of, 357
Fuirena umbellata, identity of African and American specimens, 169
Gaudichaud, specimens of the caudex of a species of Xanthorrhoea, brought by him from Port Jackson, 439
Genera, geographical distribution of, a clue to the native country of plants now generally dispersed, 149, 156
Gentianeæ, only one species in the collection from Central Africa, 295; position of their carpels, 562
Geraniaceæ found in Central Africa, 288
Glands on the receptacle in several genera of Cruciferæ, their number and position, 267; cutaneous (stomata) found on both surfaces of the leaves and foliaceous footstalks of the genus Eucalyptus, and of the leafless Acaciæ, and assisting to give a peculiar character to the Australian forests, 312; generally found on the under surface only, ibid.; rarely, as in several Coniferæ, only on the upper, ibid.
Gleichen, his description of the organs and mode of fecundation in Asclepiadeæ, 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
Goodenoviæ, observations on the order, and its distribution in Terra Australis, 31; comparison with Lobelia, 32; pollen of, remains long quiescent, 33, 575
Gramineæ, observations on the order, and its distribution in Terra Australis, 54; proportion of the order to Monocotyledons, ibid.; subdivisible into two great tribes, Poaceae and Paniceæ, 55-8; structure 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 Rhizantheæ," 423
Gulf-weed, on the origin and propagation 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, unfavorable to the theory of the auriculæ of the column representing lateral stamina, 500; H. viridis, mucous tubes inserted into the aperture of ovulum in, 540 note.
Halorageæ, observations on the order and on its distribution in Terra Australis, 21
Hibbertia volubilis, its arillus, 449
Hibiscus tiliaceus, identity of specimens from the Congo and from India, 171
Hippocraticeæ, 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 indigenous, 160
Homalinæ, characters of the order, and observations on the species found in the vicinity of the Congo, 120
