Hill and Johnson, Eucalyptus (Myrtaceae) 
537 
1-2 mm wide; valves broadly triangular, obtuse or acute, basally enclosed or rim level, 
apically rim level or exserted, raised at 45-90°. Seeds semi-glossy to dull, brownish 
black, somewhat angular to rounded, elliptical, regularly shallowly reticulate; hilum 
ventral. Chaff brown. 
A widespread and locally dominant tree across a major part of the monsoon tropics, 
but not including Cape York Peninsula. Two geographically separate subspecies are 
recognised. 
14A. Eucalyptus pruinosa Schauer subsp. pruinosa 
Adult leaves 50-150 mm long, 30-90 mm wide. Peduncles 6-25 mm long, 1-2 mm 
diam. Pedicels 2-8 rarely to 22 mm long. Buds 7-12 mm long, 4-6 mm diam.; calyptra 
hemispherical, rostrate, 1/2-1 times as long as hypanthium. Fruits 7-12 mm long, 
6-10 mm diam. 
Hybrids are recorded with E. tropica, E. limitaris and £. microtheca. 
Distribution: the gulf district of north-western Queensland, extending west through 
the Northern Territory at corresponding latitudes, and into the south-eastern 
Kimberley region of Western Australia (Fig. 18). 
Ecology: a locally dominant species in low open savanna woodlands or shrublands, 
often the only tree species in the community, frequently with Triodia understorey. 
Substrate varies from sand to sandy loam, often with laterite and usually on more or 
less flat but well-drained sites. 
Conservation status: widespread and locally abundant, not considered to be at risk. 
Selected specimens (from 39 examined): Northern Territory: 132.3 km SE of Fitzroy Crossing 
towards Halls Creek, Brooker 70784, 24 Apr 1991 (CANB, DNA, NSW, PERTH); 7 miles [11.2 km] 
NW Alexandria HS, Chippendale NT 7947, 22 Mar 1956 (DNA, NSW); 8.6 miles [12.2 km] W of 
Soudan HS, Chippendale NT 3829 & Johnson, 2 Oct 1957 (DNA, NSW); 79.1 miles [126.5 km] NE 
Tanami, Chippendale NT 5722, 13 Apr 1959 (DNA, NSW); 10 km S of Ti Tree, Fox s.n., June 1986 
(NSW301476); Robinson River station, Gittins 7307, June 1967 (NSW); 110 km SW of Hooker Creek 
toward Tanami, Gittins 2352, Aug 1971 (NSW); 3 km along track to Wollogorang from 12 Mile 
Waterhole, Halford 847720, 29 Nov 1984 (DNA, NSW); 8.4 km south of Banka Banka on Stuart 
Highway, Hill 887, Johnson & Benson, 13 July 1984 (NSW, CANB); 6 miles [9.6 km] NW of the 
Fig. 18. Distribution of E. pruinosa subsp. pruinosa, subsp. tenuata. 
