Eucalyptus occidentalis (Flat-topped Yate) Woodland
Flat-topped Yate Southern Wheatbelt Flat-topped Yate South CoastFlat-topped Yate Westsee also Wandoo and Flat-topped Yate and Brown Mallet and Flat-topped Yate See the report by Harvey and Keighery for sub-communities recognised by Keighery (Appendix 1), Gibson et al. (Appendix 2) and Griffin (Appendix 3). Many of these correspond to the sub-communities presented here, as is shown in the right hand columns of the tables in the appendices, but there are some unusual groups that are not recognised in this classification. McQuoid recognises three groups: Eucalyptus occidentalis in upland, dryland, non-drainage situations; E. occidentalis near swamps; and E. occidentalis in drainage lines.
Tree, to 20m, forming a lignotuber. Bark rough, fibrous & flaky on trunk; conspicuously smooth w hite, sometimes powdery, on the upper trunk and branches. Flowers cream, from August to May (For this and more information see EUCLID; Brooker & Kleinig; FloraBase.) Similar SpeciesEucalyptus occidentalis is closely related to E. sargentii, a rough-barked tree species always found on saline sites but differing in having terete peduncles, smaller buds in clusters of 7 and smaller fruit.
Soils and Landform
Sandy or clayey soils. On alluvial flats, low-lying wet areas, around salt lakes, hills; usually in wet, fresh-water depressions, but sometimes around salt lakes.
OverstoreyEucalyptus occidentalis usually occurs in pure stands but occasionally with E. wandoo and E. salmonophloia. Low trees of Melaleuca strobophylla, M. cuticularis and Acacia cyclops may also be present. UnderstoreyThe understorey consists of shrubs, commonly Melaleuca strobophylla, as well as M. cuticularis, M. acuminata, M. halmaturorum, M. lateriflora and Acacia cyclops, over a rich variety of herbs, grasses and sedges such as Austrodanthonia setacea group, Agrostis avenacea, Neurachne alopecuroidea, Austrostipa elegantissima, Lagenophora huegelii, Schoenus subfascicularis, Centrolepis polygyna, Chorizandra enodis, Daucus glochidiatus, Dianella brevicaulis, Isolepis nodosa and Lomandra effusa.
Number of Sites and Polygons
Average Species Richness
22.9 spp. per 100m2 (51 sites)
Suggested by McQuoidUpland Jerramungup saleyards, 2km E of Jerramungup Jerramungup Golf Course, 1.5km S of Jerramungup Calyerup Rocks, 5km E of Jerramungup, off Quiss Rd Needilup Golf Course, 13km W of Jerramungup Hart Rd, Minderabin 10km northwest of OngerupSwamp Pallarup Rocks, Muncaster Rd, 43km NW of Ravensthorpe; LK24 Wagin Lakes, 3km S of Wagin Gairdner Swamps, Swamp Rd and Bremer Boxwood RdDrainage lines Pallinup River, near Borden town Gairdner River, off Monkey Rock Rd 15km E of Jerramungup Carlawillup water reserve, 15km SE of Jerramungup Sutherland Track, Kuringup, 17km W of Pingrup Phillips River, 15km W of Ravensthorpe
RecruitmentEucalyptus occidentalis forms a lignotuber (EUCLID) and may resprout after fire. As it grows along streams and in depressions, it may not be subject to frequent burning and may develop into a tall tree form. It also grows around granite outcrops and a variety of other sites. It can seed prolifically into paddocks, as well as being found in strand lines around the edges of lakes (P. White pers. comm.). It regenerates after winter rains.In the nursery, seed has been recorded germinating in 1-2 weeks but growth may be variable. It is resistant to drought and frost, and is tolerant of saline soils where growth may be slower (Chippendale). Old GrowthTrunks with diameters up to 0.5m diameter have been recorded (Chippendale).WeedsThis community is susceptible to weed invasion from species such as Sonchus oleraceus, Lolium rigidum complex, Aira caryophyllea, Briza maxima, B. minor, Anagallis arvensis, Pentaschistis airoides, Ursinia anthemoides, Avena barbata and Ehrharta longiflora.
This community may be threatened by changes in hydrology and increasing salinity. Most of this community occurs outside the study area (the Wheatbelt NRM region) and further survey is needed to effectively classify this community in the Wheatbelt.