Chap. YI. 



ON HETBEOSTTLED PLANTS. 



249 



Table 34 



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

 Heterostyled Species; those from the short-styled form leing 

 represented by 100. 



Dimorphic Species. 



From the Long- 

 styled form. 

 Primula veris .... 67 

 „ vulgaris . . ,71 

 „ Sinensis(Hildebrand) 57 

 „ auricula ... 71 

 Hottoniapalustris(H.Muller) 61 

 „ (self) . 64 

 Linum grandiflorum , , 100 

 „ perenne(diameter va-) . „„ ,,v 

 riable). . . ./ '■ ■' 

 „ flavum . . . .100 

 Pulmonaria ofHciDalis . . 78 

 „ angustitblia , 91 



Polygonum fagopyrura. . 8i 

 Leucosmia Burnettiana . 99 

 ^giphila elata .... 62 

 Menyanthes trifoliata . . 84 

 Limnauthemum ludicum . 100 

 Villarsia (sp. ?) . . . .75 

 Forsythia suspensa ... 94 



From tbe Long- 

 styled form. 



. 100 



Cordia (sp. ?) . . 

 Gilia pulchella , 

 „ micrantha . 

 Sethia acuminata 

 Erythroxylum (sp. ?) 

 Cratoxylon formosum 

 Mitchella repens, pollen- 

 grains of the long-styled 

 a little smaller. 

 Borreria (sp. ?) .... 92 

 Faramea (sp. ?) . . . .67 

 Suteria (sp. ?) (Fritz Muller) 75 

 Houstonia coerulea ... 72 

 Oldenlandia (sp. ?) . . .78 

 Hedyotis (sp. ?) . . . .88 

 Coccocypselum (sp. ?) (F.\ ,„f, 

 Muller) . . . . / ^"" 

 Lipostoma (sp. ?) ... 80 

 Cinchona micrantha . . 91 



100 

 81 

 83 

 93 

 86 



Trimorphic Species. 



Eatio expressing the extreme differences 

 in diameter of the pollen-grains from the 

 two sets of anthers in the three forms. 

 Lythrum salicaria . , . , 60 

 Kesasa verticillata .... 65 

 Oxalis Valdiviana (Hildebrand) 71 



„ Eegnelli 78 



„ speciosa 69 



„ sensitiva .... 84 

 Pontederia (sp. ?) . . . .55 



Batio between the diameters of the pollen- 

 grains of the two sets of anthers in the 

 same form. 

 Oxalis rosea, long-styled form\ „„ 

 (Hildebrand). . ./ *"* 

 „ compressa, short-styled i „„ 



form ) 



Pontederia (sp. ?) short-styled \ 



form . , . . / 



„ other sp., mid-styled "l 



form. , . .j 



87 



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 



