Rockia Heimerl, Oesterr. Bot. Z. 63: 289. 1913.

Type.

R. sandwicensis (Hillebr.) Heimerl.

Description.

Habit and phyllotaxy. Dioecious trees or shrubs, leaves (sub)opposite or (sub)verticillate clustered at apex of branches.

Inflorescence. Axillary, terminal, arranged in compound cymes.

Flowers. Unisexual (with vestiges of another sex), sessile, with one bract and two bracteoles present at the base, male perianth campanulate, stamens 10-26, exserted (Fig. 2G), female perianth tubular or fusiform (Fig. 2H), stigma fimbriate, exserted.

Anthocarp . Leathery, elongated fusiform, with 5 ribs covered by inconspicuous glands excreting sticky substances (Figs 2I, 3F).

Pollen. Tricolpate, with 3 apertures distant 120° from each other.

Perisperm . Abundant, gelatinous.