Hill, Johnson and Blaxell, Systematic studies in the eucalypts 
281 
Intergrades: E. bmchycalyx E. pleurocorys 
Specimens examined: Western Australia: 15.2 km S of highway on track to Eyre telegraph station 
(now Eyre bird observatory). Hill 2173 & Johnson, 3 Nov 1986 (NSW, CANB, MEL, PERTH). 
9. Eucalyptus trachybasis L.A.S. Johnson & K.D. Hill, sp. nov. 
E. planipedis affinis sed alabastris fructibusque in pedunculo pedicellisque minus 
applanatis, et cortice plus minusve persistenti distinguitur. Ramuli saepe plus 
minusve pruinosi (haud in E. planipede). Umbellastrae triflorae ambas species ab 
E. concinna (non pruinosa) distingunt. 
Type: Western Australia: 5.0 km N. of Widgiemooltha on highway (31°27'S, 121°04'E), 
K.D. Hill 2639 & L.A.S. Johnson , 27 Nov 1986 (holo NSW; iso PERTH). 
Tree to 10 m tall, sometimes several-stemmed; bole short, branches spreading. Bark 
persistent, grey, fibrous-flaky at base (to 2-4 m); smooth, grey, often mottled brown or 
reddish above. Twigs usually pruinose. Juvenile leaves not seen. Adult leaves disjunct, 
narrow-lanceolate to lanceolate, often falcate, glossy bright green, acute or acuminate, 
5.0-14.0 cm long, 0.8-2.9 cm wide; petioles terete, 0.9-1.8 cm long; lateral veins at 
30-45° to midrib, moderately spaced; intramarginal vein 0.5-1.0 mm from margin, 
present but obscure. Umbellasters axillary, 3-flowered. Peduncles terete to slightly 
flattened apically, 5-10 mm long. Pedicels flattened, 3-7 mm long. Mature buds 
pyriform to clavate, 8-13 mm long, 7-10 mm diam.; calyptra hemispherical to 
patelliform, distinctly regularly costate, c. Vs -Vi as long as hypanthium, distinctly 
wider than hypanthium. Fruits obconical, tapered into pedicel, irregularly costate, 
3-4-locular, 8-11 mm long, 8-10 mm diam.; calyptra scar and stemonophore flat or 
slightly raised, 1-1.5 mm wide; disc level to depressed to c. 45°, 1.5-3 mm wide, valves 
narrowly triangular, acuminate, basally enclosed, apically ultimately vertically 
exserted, often broken at disc level. Seeds ovoid, smooth, shallowly and regularly 
pitted, dark grey- to red-brown, 1.5-2.0 mm long; hilum ventral; chaff dark red-brown, 
smaller, angular (Fig 10a, b, c). 
Distinguished from E. planipes by the smaller buds and fruits with more slender and 
less flattened peduncles and pedicels, and the stocking of persistent bark. Twigs are 
also often weakly pruinose in E. trachybasis, and not so in E. planipes. The 3-flowered 
inflorescences separate both taxa from E. concinna (7-flowered), which is also not 
pruinose (see also Table 7). 
Locally frequent on shallow calcareous soils on rocky greenstone ridges in the region 
from Widgiemooltha to north of Coolgardie (Fig. 11). Often locally dominant in open 
communities with a sparse understorey, frequently with chenopods. 
Conservation status: not considered to be at risk. 
The epithet is from the Greek trachy-, rough, and basis, base, in reference to the 
characteristic stocking of rough bark. 
Selected specimens (from 9 examined): Western Australia: along Kambalda Rd, 1 mile [1.6 km] N 
of Kambalda to Coolgardie turnoff junction, 83 miles [133.1 km] N of Norseman, Baker 14,9 Nov 1970 
(CANB, NSW); 20 miles [32 km] N of Coolgardie, Beard 6243,9 Sep 1970 (KPBG, NSW); 10-20 km 
N of Widgiemooltha, Blaxell 333848 4 Nov 1986 (NSW); Widgiemooltha, Carr 1247 & Carr, 9 Apr 
1969 (CANB, NSW, PERTH); 3.7 km W of Callion towards Mussons Soak, Hill 2653 & Johnson, 
28 Nov 1986 (NSW, PERTH). 
10. Eucalyptus planipes L.A.S. Johnson & K.D. Hill, sp. nov. 
Ab E. grijfithsii nunc separata alabastris fructibusque non glaucis et plus prominenter 
alatis. E. griffithsii saepe differt habitu plus minusve arborescenti et cortice prope basin 
plus minusve fibrosa. 
