[134]

Feb 2d Nut. (another & older sp

Filament attached .35 above ground.— Seedling now neary straight & .85 high

[Sketch] how high above ground fixed beneath scale-like leaves

[data not transcribed]

[134v]

it is proved that one form of a species is not fully fertile not except only when it is by is fertilised with pollen from another form, we have not perfectly completely reliable [evi]dence that if the species is heterostyled. But when the pistils & stamens differ in length in different two or three sets of individuals, & this is accompanied by a difference in the size of the pollen-grains or in the state of the stigma, we may infer with much safety that the species is heterostyled. I have, however, occasionally trusted solely to a difference between the two forms in the length of the pistil.

[Forms of flowers, p. 3: "Unless it be proved that one form is fully fertile only when it is fertilised with pollen from another form, we have not complete evidence that the species is heterostyled. But when the pistils and stamens differ in length in two or three sets of individuals, and this is accompanied by a difference in the size of the pollen-grains or in the state of the stigma, we may infer with much safety that the species is heterostyled. I have, however, occasionally trusted to a difference between the two forms in the length of the pistil alone, or in the length of the stigma together with its more or less papillose condition; and in one instance differences of this kind have been proved by trials made on the fertility of the two forms, to be sufficient evidence."]