Chap. VI. 



ON HETEEOSTYLED PLANTS. 



249 



Table 34. 



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

 Eeterostyled Species; those from the short-siyled form leing 

 represented hy 100. 



Dimorphic Species. 



From the Long- 

 styled form 



Primula veris .... 67 



„ vulgaris . . .71 



„ Sinensis(HiUebrand) 57 



„ auricula . . .71 



Hottonia palustris (H. MilUer) 61 



„ (self) . 64 



Linum graudiflorum . . 100 



„ perenne(diameterva-\.„- ,p,^ 



riable) . . . . J *• -' 



„ flavum . . . .100 



Pulmonaria oHiciDalis . . 78 



„ angnsti folia , 91 



Polygonum fagopyrum. . 82 



Leucosmia Buruettiana . 99 



.Sgiphila elata .... 62 



Menyanthes trifoliata . . 84 



Limnanthemum ludicum . 100 



Villarsia (sp.?) .... 75 



Forsythia suspensa ... 94 



From the Long- 

 sty Led form. 



. . .100 



Cordla (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 cosrulea ... 72 

 Oldenlandia (sp. ?) ... 78 

 Hedyotis (sp. ?) . . . .88 

 Coccocypselum (sp.?) (F.l ..g 



Muller) . . . . / 

 Lipostoma (sp. ?) ... 80 

 Cinchona micrantha , , 91 



100 

 81 

 83 

 93 

 86 



Trimorphic Species, 



Katio expressing the extreme difFerences 

 ■ in diameter of the pollen-grains from the 

 two sets of anthers in the three forms. 

 Lythrum salicaria .... 60 

 Nessea verticillata .... 65 

 Oxalis Valdiviana (Hildebrand) 71 



„ Kegnelli 78 



„ speciosa 69 



„ sensitiva .... 84 

 Pontcderia (sp. ?) . . . ,55 



Eatio between the diameters of the pollen- 

 grains of the two sets of anthers in the 

 same form. 

 Oxalis rosea, long-styled form"! „„ 

 (Hildebrand) . . . j '^ 

 „ compressa, short-styled i „„ 



form I 



Pontederia (sp. ?) short-styled \ „_ 

 form. . . ./ "' 

 „ other sp.,mid-styled\ „„ 

 form, , . ./ 



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 



