Forsythia suspensa. stamens. — viridissima.
Fragaria Chiloensis. — elatior. — vesca. — Virginiana.
Fraxinus excelsior.
Galium cruciatum.
Gartner on the sterility of unions between distinct species. Primula vulgaris and veris. hybrid Verbascums. prepotency of pollen. variation in the sexual powers of plants. contabescent anthers.
Gentianeae.
Geraniaceae.
Geranium sylvaticum.
Gesneria pendulina.
Gilia aggregata. — coronopifolia. — micrantha. — nudicaulis. — pulchella.