(McGill.) Olde & Marriott
Grevillea willisii subsp. pachylostyla McGill.
Grevillea pachylostyla, commonly known as Buchan River grevillea, is a shrub species which is endemic to the upper reaches of the Buchan River in the eastern highlands of Victoria, in Australia.
It has a spreading habit, growing to 1.5 metres high. The leaves are deeply lobed. Flowers appear between October and February (mid spring to late summer) in its native range. These have cream perianths with contrasting black underneath and inside and cream styles that turn pink or red after antithesis.
The taxon was first formally described in 1986 by Donald McGillivray as a subspecies of Grevillea willisii, namely G. willissi subsp. pachylostyla. This description was based on a collection by James Hamlyn Willis in the Reedy River gorge on the Nunniong Plateau in Eastern Victoria in November 1964. It was promoted to species status in 1994 by Peter Olde and Neil Marriott. Plants which appear to be intermediate between this species and G. willisi have been collected near Gelantipy.
G. pachylostyla occurs on rocky granite outcrops and near streams. It is listed as "Rare in Victoria" on the Department of Sustainability and Environment's Advisory List of Rare Or Threatened Plants In Victoria.
- "Grevillea pachylostyla". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government, Canberra. Retrieved 2010-06-13.
- "Grevillea pachylostyla". Flora of Australia Online. Department of the Environment and Heritage, Australian Government.
- Wild Plants of Victoria (database). Viridans Biological Databases & Department of Sustainability and Environment. 2009.
- "Advisory list of rare or threatened plants in Victoria - 2014" (PDF). The State of Victoria Department of Environment and Primary Industries. Retrieved 29 June 2017.
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