Howittia trilocularis
F.Muell. Blue HowittiaDiffuse shrub to c. 3 m high. Leaves ovate or oblong-ovate, 2.5–12 cm long, 1.5–8 cm wide, usually shallowly cordate at base, margins entire, crenate or shallowly lobed, lower surface pale, variably covered with whitish or rusty stellate hairs. Flowering pedicels 1.5–5 cm long; calyx 6–10 mm long, rusty stellate-pubescent, lobes acute; petals blue, violet or whitish, 1–2.5 cm long, not spreading widely. Capsule hemispherical or depressed-globular, 5–10 mm diam., stellate or silky-pubescent; seeds c. flattened- obovoid, 3 mm long. Flowers Sep.–Jan.
Wim, GipP, GGr, DunT, EGL, EGU, HSF, HFE. Also ?SA, NSW. Locally common along streams, rainforest margins, and in moist lowland eucalypt forests eastward from about Bairnsdale, with disjunct western occurrences in the Grampians (Victoria Range), the nearby Black Range, and Mt Arapiles. South Australian occurrences have not been substantiated by any post-1880 records. .
Plants from the Grampians and nearby areas have leaves and flowers generally larger and have a looser, rustier indumentum on the leaf undersurfaces than eastern Victorian plants.
Walsh, N.G. (1996). Howittia. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae, pp. 334–335. Inkata Press, Melbourne.