Hollandaea

• Hollandaea diabolica A.J.Ford & P.H.Weston^[4][10][11]
• Hollandaea porphyrocarpa A.J.Ford & P.H.Weston^[4][10][12]
• Hollandaea riparia B.Hyland^[13][14]
• Hollandaea sayeriana (F.Muell.) L.S.Sm.^[15][16]

Synonyms: base name: Helicia sayeriana F.Muell.;^[2] Hollandaea sayeri (F.Muell.) F.Muell.^[1]

Hollandaea sayeriana is a species of small trees growing naturally only in the region of Mounts Bellenden Ker,^[7] Bartle Frere and the eastern Atherton Tableland. They grow naturally as understory trees beneath the canopy of rainforests, from the lowlands to tablelands, up to about 800 m (2,600 ft) altitude.^{[4][5][6][15]} As of December 2013^[update] this species has the official, current, Queensland Government conservation status of "near threatened" species.^[17]: 72

Hollandaea riparia is a species of shrubs and small trees named for growing naturally only in riparian and gallery forest as a rheophyte (river streamside plant). Botanists have found it only in a restricted natural range in the Daintree Rainforest region.^{[4][5][6][14]} As of December 2013^[update] this species has the official, current, Queensland government conservation status of "vulnerable" species.^[17]: 53

The species Hollandaea diabolica and Hollandaea porphyrocarpa were both recognised by botanical science only as recently as the 1990s and formally scientifically described in 2012.^[3][4][10] Around the early 1990s both were recognised only in a restricted area in the mountains west and north west of Mossman, Queensland. A population of H. diabolica affinity was subsequently found south of Mount Bellenden Ker but collections were only of sterile material and not yet fertile and fruiting material.^[4] Both species may only grow naturally in the restricted mountains areas reported and further field work will clarify this.^[4][11][12]

• Hyland, Bernie P. M. (1995). "Hollandaea F.Muell.". In McCarthy, Patrick (ed.). Flora of Australia: Volume 16: Eleagnaceae, Proteaceae 1. Flora of Australia series. CSIRO Publishing / Australian Biological Resources Study. pp. 499, 391–3, Fig's 139 172, Maps 441 442. ISBN 978-0-643-05692-3.
• F.A. Zich; B.P.M Hyland; T. Whiffen; R.A. Kerrigan. "Australian Tropical Rainforest Plants Home". Australian Tropical Rainforest Plants (RFK8). Centre for Plant Biodiversity Research, Australian Government. Retrieved 25 May 2021.