CHAP. VI. 



ON HETEROSTYLED PLANTS. 



249 



TABLE Si. 



Relative Diameter of the Polhn-grains from the forms of the same 

 Heterostyled Species; those from the short-styled form being 

 represented by 100. 



Dimorphic Species. 



From the Long- 

 sty led form. 



Primula veris .... 67 



vulgaris . . .71 



Sinensis(Hildebrand) 57 



auricula . . .71 



Hottoniapalustris(H.Miiller) 61 



(self) . 64 



Linum grandiflorum . . 100 



perenne(diameterva-\ 1nf . ,,v 



ruble). . . ,/ lw w 



flavum .... 100 



Pulmonaria otRcinalis . . 78 



angustifolia . 91 



Polygonum fagopyrum. . 82 



Leucosmia Burnettiana . 99 



jEgiphila elata .... 62 



Idenyanthes trifollata . . 84 



Limnauthemum ludicum . 100 



Villarsia (sp. ?) . . . .75 



Forsythia suspeusa ... 94 



From the Long- 

 sty let! f.i i in. 



Cordia(sp. ?) . . . .100 

 Gilia pulchella . . . .100 

 mi era ut ha . . . .81 

 Sethia acuminata ... 83 

 Erythroxylum (sp. ?) . . 93 

 Cratoxylon formosuin . . 86 

 Mitchella repens, pollen- 

 grains of the long-styled 

 a little smaller. 



Borreria (sp. ?") . . . .92 

 Faramea (sp. ?).... 67 

 Suteria (sp. ?) (Fritz Miiller) 75 

 Houstonia coerulea ... 72 

 Oldenlandia (sp. ?) . . . 78 

 Hedyotis (sp. ?) . . . .88 

 Coccocypselum (sp.?) (F. 



Miiller) .... 

 Lipostoma (sp. ?) ... 80 

 Cinchona micrantha , 91 



100 



Trimorphic Species. 



Ratio expressing the extreme differences 

 in diameter of the pollen -grains from the 

 two sets of anthers in th three forms. 



Lythrum salicana .... 60 



Nesaea verticillata .... Go 



Oxalis Valdiviana (Hildebrand) 71 



Regnelli. ... 78 



speciosa .... 69 



, sensitiva , 84 



Pontederia (sp. ?) . 



. 55 



Ratio between the diameters of the pollen- 

 grains of the two sets of anthers in the 

 same form. 

 Oxalis rosea, long-styled fonn\ R q 



(Hildebrand). . ./ B 

 compressa, short-styled i 



form ..... f 8 

 Pontederia (sp. ?) short-styled 

 form . 



_ 



other sp., mid-sty led \ ., 

 form. . . ./ 8 



and we should bear in mind that in the case of 

 spheres differing to this degree in diameter, their 

 contents differ in the ratio of six to one. With all 

 the species in which the grains differ in diameter, 

 there is no exception to the rule that those from the 



