Nolana prostrata, variability in length of stamens and pistil.
Nyctaginia.
Oldenlandia.
Oleaceae.
Oliver, Professor, on ovules of Primula veris. Viola. Campanula colorata.
Ononis columnae. — minutissima. — parviflora.
Origanum vulgare.
Oxalis acetosella.
pisil of.
cleistogamic flowers.
pollen-grains.
— Bowii.
— compressa.
— corniculata.
— Deppei.
— hedysaroides.
— homostyled species.
— incarnata.
— Regnelli.
— rosea.
— (Biophytum) sensitiva.
stigma.
— speciosa.
— stricta.
— tropaeoloides.
— Valdiviana.
Oxlip, the Bardfield.
—, the common.
differences in structure and function between the two parent-species.
effects of crossing.
a hybrid between the cowslip and primrose.
Oxybaphus.