coccinea.--Origanum vulgare, great increase of the crossed plants by
stolons.--Thunbergia alata.


CHAPTER IV.

CRUCIFERAE, PAPAVERACEAE, RESEDACEAE, ETC.

Brassica oleracea, crossed and self-fertilised plants.--Great effect of
a cross with a fresh stock on the weight of the offspring.--Iberis
umbellata.--Papaver vagum.--Eschscholtzia californica, seedlings from a
cross with a fresh stock not more vigorous, but more fertile than the
self-fertilised seedlings.--Reseda lutea and odorata, many individuals
sterile with their own pollen.--Viola tricolor, wonderful effects of a
cross.--Adonis aestivalis.--Delphinium consolida.--Viscaria oculata,
crossed plants hardly taller, but more fertile than the
self-fertilised.--Dianthus caryophyllus, crossed and self-fertilised
plants compared for four generations.--Great effects of a cross with a
fresh stock.--Uniform colour of the flowers on the self-fertilised
plants.--Hibiscus africanus.


CHAPTER V.

GERANIACEAE, LEGUMINOSAE, ONAGRACEAE, ETC.

Pelargonium zonale, a cross between plants propagated by cuttings does
no good.--Tropaeolum minus.--Limnanthes douglasii.--Lupinus luteus and
pilosus.--Phaseolus multiflorus and vulgaris.--Lathyrus odoratus,
varieties of, never naturally intercross in England.--Pisum sativum,