Australian Tropical Rainforest Plants - Online edition
Zieria robertsiorum J.A.Armstr.
Armstrong, J.A. (2002) Australian Systematic Botany 15(3): 429-431. Type: L.J.Brass 20113, 7.ix.1948, Mt Finnegan, alt. 1000 m. Holo: BRI 134755; iso: CANB 186448: K.
Leaves palmately trifoliolate, not or very slightly glandular verrucose; petioles 2.5-10 mm long, glabrescent or having sparse to moderately dense stellate indumentum; leaflets elliptic to obovate, 6-28 mm x 2.5-11 mm, margins entire, flat or slightly recurved, with stellate hairs, midribs of abaxial surface raised.
Inflorescence axillary, shorter than or nearly equal to subtending leaf, usually 3-10-flowered, 1-3 flowers open at any time, not glandular verrucose, with stellate hairs; peduncle 1.5-12 mm long; bracts scale to leaf like, to 3 mm long. Sepals semi-circular to broadly deltate, 0.7-1 x 1-1.2 mm, not or slightly glandular verrucose, with simple and stellate hairs. Petals elliptic, 1.5-3.5 mm x 1.2-1.5 mm, white, with stellate hairs. Ovary glabrous or with stellate hairs.
Cotyledons linear, elliptic or clavate, about 5-10 x 2-3 mm. First pair of leaves trifoliolate and opposite. At the tenth leaf stage: leaf trifoliolate, leaflet blades sessile or shortly stalked, aromatic when crushed, oil dots visible to the naked eye, lateral veins looping inside the blade margin. Compound leaf petiole grooved on the upper surface. Leaf and stem hairs small, mainly simple but with a few stellate hairs included.