608 



INDEX. 



lies, 532; function of tlie granules 

 of, in reference to impregnation, 

 533, 550-1 ; origin, production, 

 growth, and function of, in Or- 

 chidese, 537 — 541 ; in Bonatea spe- 

 ciosa, 537 — 540; mucous tubes, 

 their growth, &c., 539, 540 ; 

 traced into the aperture of the 

 ovulum, 540 ; confirmed in various 

 species, 547 ; traced to a definite 

 poiut in the oyula of Asclepiadese, 

 550-1; 1heir course, structure, and 

 function in, ibid. 



Polygalese, observations on the order 

 and its distribution in Terra A.us- 

 tralis, 14 ; on its distinction from 

 Leguminosse, 291-2 



Pomax, undoubtedly referrible to 

 Rubiaceee, 36 



Potalia, observations on the genus and 

 its affinities, 133-4 



Preiss, M., plants collected by, in 

 Western Australia, 338 



Primulacese, species found in Central 

 Africa, 297 



Proteaceee, observations on the order 

 and on its distribution in Terra 

 Australis, 40 ; species found at 

 Swan River, 310 ; few species found 

 in the interior, 339 ; peculiarity in 

 the winged seeds of, 449 



Pterocarpus erinacea, the tree pro- 

 ducing the African gum Kino, 290 

 and note 



Radicle, position of the, in different 

 genera of Cruciferse, 2(54 



Radicle, position of the, in reference 

 to the insertion of tiie funiculus of 

 less importance in Zjgophyllese than 

 elsewhere, 287 



Raffles, Sir Stamford, his journey from 

 Bencoolen into the interior of Su- 

 matra, 369 ; letter to Sir Joseph 

 Banks on the discovery of the great 

 flower, afterwards named Raiflesia, 

 370—373 ; letter to Mr. Marsden, 

 with further particulars, 393-4; 

 further specimens received from, 

 401 



Rafflesia, account of a new genus of 

 plants named, 367 ; character of the 

 genus, 374 ; affinities of the genus, 

 383— 389,401— 415; compared with 

 Asarinae, 384-5, 389,392, 396, 401 ; 



Passiflorese, 386-7, 389; Napoleona, 

 387-8; CucurbitaccK, 388; Ster- 

 culiacese, 388-9 ; Cytinus, 396, 401 ; 

 the structure and economy of its 

 female flower, 402 — 410 ; charac- 

 ters of the genus, 424 



Rafflesia Arnoldi, on the female flower 

 and fruit of, 399; Dr. Arnold's 

 account of its discovery, and de- 

 scription, 370 — 373 ; drawing and 

 specimens brought to England by 

 Dr. Horsfleld, 373 ; description of, 

 374—376, 415-16; its structure, 

 377—383; of its column, 377; 

 vessels wanting, ibid. ; of late forma- 

 tion, 412, 413 note; perianthium 

 and bractese, ibid.; antherse, 377 

 — 383 ; possible styles and stig- 

 mata, 382, 386 ; impregnation, 383 ; 

 insects necessary in, ibid. ; discovery 

 of female flower, 394-5 ; desiderata 

 respecting, 395-6 ; whether para- 

 sitical on the root from which it 

 springs, 389 — 392 ; its reticulate 

 base, 390, 402 ; structure of the 

 female flower, 403 — 409 ; internal 

 structure of ovarium, 403 — 405 

 compared with that of Hydnora 

 404 ; and Cytinus, 405 ; develop- 

 ment of ovula, 406-7; seeds, 408 

 embryo, 409 ; its characters, 424 



Rafflesia Cumingii, structure of its 

 column and the processes surmount- 

 ing it, 405 note ; its character, 425 ; 

 observations on its structure, 426 ; 

 and nomenclature, ibid. 



Rafflesia Horsfieldii, account of, 389, 

 390 and note ; its characters, 425 



Rafflesia Patma, Dr. Blume's account 

 of, 402 ; its characters, 424 



Rafflesiaceae, a natural family, 410 ; 

 its characters, 423 



Eafflesieae, a tribe of Rafflesiacese, 

 410 ; its characters, 424 



Raphe, apparently external in Zygo- 

 phyllum Pabago, 287; its termi- 

 nation affords a sure indication of 

 the orgin of the inner membrane of 

 the ovulum, 441 ; its position in 

 relation to the placenta, 448 ; ex- 

 ceptions to the general rule, in con- 

 sequence of resupination, 448 ; be- 

 longs to the outer membrane of the 

 ovulum, 450 



Raphides in Orchidese, 515 



