606 



INDEX. 



ception in Nymphsea, Nuphar, Bu- 

 tomese, Lardizabalese, ibid., 555 ; 

 Hydropeltidese, Mesembryantbe- 

 mum, 556 ; explanation of, 556 ; be- 

 long to the transformed leaf, or car- 

 pel, and not derived from processes 

 of tbe axis, 563 ; arrangement of in 

 Cyrtandracese, 558; in Hydnora, 

 E,afilesia, and Brugmansia, ibid. 

 Oxalideee, distinction of the order, 

 observation on its affinities, and on 

 the genera composing it, 113-14 



Palmae, observations on the order and 

 on its distribution in Terra Aus- 

 tralis and New Zealand, 51; further 

 observations on the order, on its 

 distribution, and on the species 

 found in the vicinity of the Congo, 

 140 



Paniceee, a tribe of Graminese, obser- 

 vations on the tribe and its distri- 

 bution in Terra Australis and else- 

 where, 57-8 



Papaveracese, stigmata and placentae 

 of adjoining cells confluent in, 559 



Papaw of the banks of the Congo, 

 probably brought from America, 

 155 ; arguments in favour of its 

 American origin, 158 



Papilionacese, observations on tbe or- 

 der, and on its distribution in Terra 

 Australis, 24 ; species found in the 

 vicinity of the Congo, 111; in 

 Central Africa, 295 



Parasites on roots, distinguishing cha- 

 racters of, in their leaves, seeds, 

 and embryo, 391-2; modes of 

 union between the stock and para- 

 site, 392; no instance, at present, 

 of parasites on roots originating 

 from other parts of the plant, 395 ; 

 found, however, to be the case in 

 Rafflesia Arnold!, 403. 



Parasitism of Rafflesia discussed, 389 

 — 392 ; proved, 394-5 ; compared 

 with Cytinus, Aphyteia, Cynomo- 

 rium, and Balanophora, 391-2 ; 

 mode of growth from the seed, and 

 attachment to the stock in Raffles- 

 iaeese, 414 note 



Park, Mungo, plants collected by bira 

 on the banks of the Gambia, 152 



Parkia, characters of the genus and 

 observations on the species com- 

 posing it, 289 and note . 



Parnassia, stigmata and placentse of 

 adjoining cells confluent in, 559 



Paropsia, its affinities, 121 



Parry, Captain, list of plants collected 

 at Melville Island, during the voy- 

 age of, 183, 195. 



Passiflorese, observations on, 121 ; 

 regarded as forming a natural class, 

 with Cucurbitaceae and HomaiinaB, 

 122 ; observations on the African 

 species of, 150; compared with 

 Rafflesia, 386-9 



Paterson, Colonel, plants collected by 

 him in New South Wales, and at 

 Port Dalrymple, 6 



Peliosanthes Teta, its seed becomes 

 naked by the early rupture of the 

 pericarpium, 362 



Pennisetum trichotomum, a great an- 

 noyance to man and beast, 302-3 



Petaloma belongs to Melastomacese, 

 118 



Phsenogamous plants, number of 

 species in Persoon's Synopsis, 5 ; 

 number of Australian species known 

 [in 1814], 7 ; [in 1849], 338 



Philydrum, observations on the genus, 

 53 



Phyllocladus, analogy of male and 

 female organs in, 460 



Phytolacese, establishment of the 

 order, observations on its structure 

 and affinities, and on the species 

 found in the vicinity of the Congo, 

 138 



Pineapple of the banks of the Congo 

 brought from America, 155 



Pinus, origin of the ovulum in, 458 ; 

 analogy of male and female organs 

 in, 461; plurality of embryos in 

 several species of, 568 — 572 ; the 

 species of, well adapted for an in- 

 vestigation into the origin and 

 development of the embryo, 569 ; 

 early changes consequent on im- 

 pregnation in, 569— 571 ; separa- 

 tion of the amnios, 570 ; formation 

 of cavity in, ibid. ; development of 

 funiculi, 577; formation of embryos, 

 ibid. ; ramification of funiculi, 577- 

 8 ; each impregnated ovulum con- 



