He experimented on some of the very same species as did Gartner.
The difference in their results may, I think, be in part accounted for by Herbert's great horticultural skill, and by his having hot-houses at his command.
Of his many important statements I will here give only a single one as an example, namely, that "every ovule in a pod of Crinum capense fertilised by C.
revolutum produced a plant, which I never saw to occur in a case of its natural fecundation.
" So that here we have perfect, or even more than commonly perfect fertility, in a first cross between two distinct species.