INDEX. 



349 



i 



MULLER. 



182-184; Oxalia MegnelU, 212; 

 Chamissoa, 291. 



Miiller, H., on the frequency of 

 visits by insects to the Umbelliferse 

 and Composite, 5 ; on dichogamy, 

 10 ; on Anthophora and Bombylius 

 sucking the cowslip, 22 ; Primula 

 elatior, 32 ; P. villosa, 49 ; Hottonia 

 palustris, 51 ; table of relative fer- 

 tility of, 52; Linum catharticum, 

 100; Polygonum fagopyrum, 112; 

 Lythrum salicaria, 145 ; on the 

 origin of heterostylism, 264 ; on 

 the Labiatte, 298, 303; Thymus 

 serpyllum, 300 ; Scabiosa arvensis, 

 304 : Plantago lanceolate, 306 ; size 

 of corolla in the two sexes of the 

 same species, 308 ; Impatiens bal- 

 sa mina, 327; Lysimachia, 342. 



Myosotis, 307. 



N. 



Nepeta glechoma, 300. 

 Nertera, 285. 

 Nessea verticillata, 166. 

 Nolana prostrata, variability in 

 length of stamens and pistil, 262. 

 Nyctaginia, 312. 



O. 



OMenlandia, 132. 



Oleacese, 117. 



Oliver, Prof., on ovules of Primula 

 veris, 17; Viola, 317; Campanula 

 colorata, 329. 



Ononis columnx, 324. 



minutissima, 325, 340. 



parviflora, 325. 



Origanum vulgare, 298. 



Oxalis acetosella, 181 ; pistil of, 262 ; 

 cleistogamic flowers, 320 ; pollen- 

 grains, 337. 



Bowii, 179. 



compressa, 178. 



— corniculata, 181. 



— Deppei, 179. 



— hedysaroides, 213. 



— homostyled species, 181. 



— incarnata, 321. 



— Regnelli, 173, 174, 212. 



— rosea, 177, 213. 



— (Biophvtum) sensitiva, 180, 321 ; 

 stigma, 254. 



PRIMULA. 



Oxalis speciosa, 168, 175, 212. 



stricta. 181. 



tropwoloides, 181. 



Valdiviana, 170-172, 212. 



Oxlip, the Bardfield, 32, 72. 



, the common, 55; differences 



in structure and function be- 

 tween the two parent species, 56 ; 

 effects of crossing, 60 ; a hybrid 

 between the cowslip and prim- 

 rose, 70. 



Oxybaphus, 312. 



r. 



Pseony, pollen-grains of, 337. 

 Parallelism between illegitimate 

 and hybrid fertilisation, 240. 



Pavonia, 312. 

 Phlox Hentzii, 120. 



nivalis, 120. 



subulata, 120, 287. 



Planehon on Linum salsoloides, 100 ; 



L. Lewisii, 101 ; on Hugonia, 100. 



Plantago lanceolata, 306. 



media, 306. 



Polemoniacese, 118. 



Pollen-grains, relative diameter of, 

 250. 



Polyanthus, 18. 



Polygonacex, 111. 



Polygonum bistorta, 113. 



fagopyrum, 111, 240 ; pollen- 

 grains, 252. 



Pontederia, 182 ; pollen-grains, 185 ; 

 size of anthers, 253. 



cordata, 186. 



Posoqueria fragrans, 131. 



Primrose, the common, 34, 57-71. 



Primula, the, heterostyled species 

 of, 14 ; summary on, 45-49 ; 

 homostyled species, 49. 



auricula, 30, 43, 48, 74, 223. 



equal-styled varieties, 273. 



cortusoides, 44. 



data, 49. 



elatior, Jacq., 32 ; relative fer- 

 tility of the two forms, 32, 47 ; 

 not a hybrid, 72, 73 ; equal- 

 styled yar. of, 224, 273. 



farinosa, 45 ; equal-styled 



var., 224, 273. 



— hirsnta, 74. 



— involucrata, 45. 



— longitlora, 49. 



— mollis, 49, 50. 



