Common name: Deua Grevillea, Deua flame
Grevillea rhyolitica Makinson APNI* 
Description: More or less erect shrub, 0.5–2 m high.
Leaves narrow- to broad-elliptic, 4–11 cm long, 10–25 mm wide, margins entire, lower surface exposed, with an open to sparse indumentum (surface of leaf visible between hairs), either of ascending 2-branched hairs and then often also with scattered minute simple erect glandular hairs, or short-armed closely appressed 2-branched hairs only.
Conflorescences decurved to pendent, simple or basally 2-branched, ovoid to ± globose. Perianth red, subsericeous to loosely tomentose outside, bearded inside. Gynoecium 16–20 mm long; ovary stipitate, glabrous; style glabrous except for erect hairs in the apical 5–16 mm; pollen presenter lateral or nearly so.
Follicle glabrous.
Flowering: Flowers September–December
Distribution and occurrence: Occurs in subcoastal montane areas, northwest to southwest of Moruya.
NSW subdivisions: SC
Text by R. O. Makinson
Taxon concept:
| | Key to the subspecies | |
| 1 | Leaves with lower surface with an open indumentum of ascending 2-branched hairs (often also with simple erect glandular hairs); outer surface of perianth with simple erect hairs (mixed among ascending 2-branched hairs) usually confined to the basal third, occasionally more extensive | subsp. rhyolitica |
| Leaves with lower surface with scattered minute closely appressed 2-branched hairs (surface sometimes appearing glabrous); outer surface of perianth with simple erect hairs (mixed among ascending 2-branched hairs) distributes over the whole surface, including limb segments | subsp. semivestita |
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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