Hill, Johnson and Blaxell, Systematic studies in the eucalypts 
267 
Western Australia: N of Mt Le Grand, Cape le Grand National Park, Blaxell 1742, Pryor & J. Briggs, 
15 Sep 1978 (NSW, PERTH); 6 km south of Fisheries Road on Duke of Orleans Bay Road, Blaxell 
86-077 & Brooker, 6 Nov 1986 (NSW, CANB, PERTH); 22 km (direct) north of Wellstead, 2 km north¬ 
west of Rams Head on Monjebup road, B. Briggs 7877 & Johnson, 11 Oct 1984 (NSW, CANB, 
PERTH); Cheyne Beach (east), Brooker 6686, 28 Dec 1979 (CANB, NSW, PERTH); Sandy Hook Island 
near Esperance, Brooker 7494, 1 May 1982 (CANB, NSW); Kojoneerup Springs road comer with 
Chillinup road, Brooker 8046, 23 Mar 1983 (CANB, NSW); Along Southern Ocean West road, W of 
Hopetoun, Carr 659 & Carr, 2 Apr 1968 (CANB, BRI, CANB, MEL, NSW, PERTH); Bremer Bay, just 
out of town on Borden road, Carr 1129 & Carr, 4 Sep 1969 (CANB, AD, BRI, CANB, MEL, NSW); 
Rotary Lookout, Esperance, Chippendale 183, 14 Mar 1967 (CANB, NSW); Warriup Rd, 15.2 km E 
of junction with Hassell Rd, c. 76 km (by road) NE of Albany, Conn 3363 & Scott, 10 Oct 1989 (NSW); 
Stirling Range, junction of East Pillenorup and South Isongerup Tracks, Crisp 5277, 18 Jan 1979 
(CBG, NSW, PERTH); Nova Hollandia, Drummond 75, (K, NSW); Culham Inlet W of Hopetoun, 
George 7596 & Carr, 22 Feb 1966 (CANB, DNA, BRI, NSW, MEL, AD, PERTH, HO); Mt Ragged 
turnoff, 128.7 km S of Balladonia roadhouse on track to Israelite Bay, Hill 251 & Johnson, 20 Oct 1983 
(NSW, CANB); Mount Melville Garbage Tip (16.5 km from Highway), Hill 2430, Johnson & Blaxell, 
12 Nov 1986 (NSW, PERTH); West Cape Howe, Bmce Tarbottom memorial walk, on eastern slope 
of ridge, Hill 3078, 5 Sep 1988 (NSW, CANB, PERTH); Isthmus Hill trig. Flinders Peninsula, south 
of Albany, Powell 3216, Everett & Bedford, 15 Nov 1985 (NSW, PERTH); Cape Riche, dunes above 
beach, Powell 3247, 16 Nov 1985 (NSW, PERTH, CANB); 8.4 km W of the mins at Israelite Bay, Pryor 
177 & /. Briggs, 26 Oct 1978 (CANB, NSW); 131.8 km S of Balladonia (at turnoff to Israelite Bay), 
Pryor 186 & J. Briggs, 26 Oct 1978 (CANB, NSW). 
3. Eucalyptus costata F. Muell., Trans. Victorian Inst.: 33 (1855). 
Type: South Australia: Angaston, Behr s.n., Dec 1848 (lecto MEL 1552443; here 
designated; isolecto K). Cited as: 'Behr & Muell. Coll.'; 'In the Mallee scrub, from the 
Murray River to Spencer's Gulf.' This specimen was labelled E. incrassata var. angulosa 
by Mueller, but is the only specimen in MEL which can fit this citation. 
Maiden (Crit. Revis. Eucalyptus 1903-1933,1: 102) gave the authority for this name as 
R. Br., but Mueller did not acknowledge Brown or cite Brown's collection. Mueller did 
specifically cite Behr and Mueller as collectors, so the authority must remain as above, 
and Maiden's statement treated as below. The name has no connection with 
Metrosidews costata Gaertn. (= Angophora costata (Gaertn.) Britten). 
E. costata was included in E. incrassata var. angulosa by Bentham (1867) and Maiden 
(Crit. Revis. Eucalyptus 1903-1933, 1: 101), and in E. angulosa by Blakely (1934). 
Burbidge (1947) recognised it as a variety of E. incrassata, and Pryor & Johnson (1971) 
included it in a broadly circumscribed E. incrassata. We now divide E. incrassata sens, 
lat. into several taxa, one of which is E. costata. 
Mallee to 5 m tall. Bark smooth, grey to grey-brown, shedding in ribbons. Juvenile 
leaves disjunct, ovate to elliptical, to 10 cm long, 5 cm wide. Adult leaves disjunct; 
lanceolate to broad-lanceolate or narrow-elliptical, acuminate, glossy bright green, 
6.0-11.0 cm long, 13-28 mm wide; petioles terete or slightly flattened, 12-20 mm long; 
lateral veins at 35-45° to midrib, moderately spaced, ± degenerate; oil glands dense 
and distinct; intramarginal vein 1-2 mm from margin. Umbellasters axillary, 3-7- 
flowered; peduncles flattened, apically expanded, 12-18 mm long; pedicels terete, 
3-10 mm long. Mature buds ovoid, weakly to moderately costate, 9—18 mm long, 5-8 mm 
diam.; calvptra conical, often beaked, c. Vi as long to as long as hypanthium. Fruits 
ovoid or cup-shaped to cylindrical, weakly to moderately costate, 3-4-locular, 9-16 mm 
long, 7-12 mm diam.; calyptra scar and stemonophore flat, c. 0.5-1 mm wide; disc 
steeply depressed, 1.5-3 mm wide; valves deeply enclosed to just below rim level. 
Seeds ± pyramidal, deeply and regularly pitted, narrowly winged, dark grey-brown to 
black, 1.0-1.5 mm long; hilum ventral; chaff red brown, smaller, angular (Fig. 1). 
Distinguished within the series by the following: mallee; juvenile leaves medium to 
large (to 10 x 5 cm); adult leaves lanceolate to broad-lanceolate; calyptra short (l:b < 
