Hill, Johnson and Blaxell, Systematic studies in the eucalypts 
279 
E. pleurocorys is distinguished from E. melanoxylon by the broader, ribbed calyptra, the 
longer, conical fruits and the less extensive rough bark (see also Table 6). 
This species occurs in a wide range of habitats, from mallee scrub on heavy calcareous 
soil over limestone to woodland on calcareous loam, and mallee heath on skeletal 
white sandy soil over quartzite. Associated species include E. gracilis F. Muell., E. oleosa 
F. Muell. ex Miq., £. flocktoniae and E. cooperiana F. Muell.. 
E. pleurocorys is recorded from near Mt Ragged and near Caiguna (Fig. 9). The 
intervening country is poorly explored and it is likely to occur throughout the region. 
This taxon has in the past been included in E. rugosa, but its affinities are more with 
E. melanoxylon. E. rugosa, as here circumscribed, does not extend into Western Australia. 
Conservation status: not considered to be at risk. 
The epithet is from the Greek pleuron, 'a rib', and corys, 'helmet', referring to the ribbed 
calyptra. 
Selected specimens (from 30 examined): Western Australia: 21.1 miles [34 km] south of Mt 
Ragged on track to Israelite Bay, Allan 756, 16 Sep 1971 (PERTH, NSW); 130 km S of Balladonia, 
SW of Mt Ragged, Brooker 5637 ,3 Apr 1977 (CANB, AD, MEL, NSW, PERTH); 1.5 km from Israelite 
Bay track to Mt Ragged track, Brooker 8913 ,8 Apr 1985 (CANB, NSW); 20.1 km from Israelite Bay 
track on Mt Ragged track, Brooker 8918, 8 Apr 1985 (CANB, NSW); c. 3 km S of Bandalup Hill, 
Brooker 9481, 11 Apr 1985 (CANB, NSW); c. 0.2 km E of Lake King turnoff on Ravensthorpe to 
Albany road, Brooker 9643, 19 May 1987 (CANB, NSW); Junana Rock, 121 km S of Balladonia 
roadhouse on track to Mt Ragged, Hill 244 & Johnson, 20 Oct 1983 (NSW); 4.5 km along track from 
Mount Ragged turnoff towards Israelite Bay, Hill 259 & Johnson, 20 Oct 1983 (NSW); 25.0 km S of 
highway on track to Eyre telegraph station (now Eyre bird observatory), Hill 2176 & Johnson, 3 Nov 
1986 (NSW, CANB, MEL, PERTH); 9.2 km south of highway on Mason Bay road (south of 
Bandalup Hill), Hill 2365, Johnson, Blaxell & Brooker, 9 Nov 1986 (NSW, CANB, MEL, PERTH); 9.3 km 
W of Ravensthorpe to Hopetoun road, on Road 11, Hill 2373, Johnson, Blaxell <& Brooker, 9 Nov 1986 
(NSW, PERTH); Hamersley Inlet, at picnic area. Hill 3151 ,7 Sep 1988 (NSW, CANB, PERTH); 2 miles 
[3.2 km] N of Ravensthorpe, Johnson W 225 ,19 Dec 1960 (NSW); 33.5 km W of the ruins at Israelite 
Bay, Pryor 183 &J. Briggs, 26 Oct 1978 (CANB, NSW). 
Fig. 9. Distribution of E. brachycalyx, E. melanoxylon, E. pleurocorys. 
