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he Goodeniaceaefamily is known for its colourful and attractive flowers. Apart from lzchenaultia, Ien other genera make uP this diverse family. They include Goodenia, Dampiera, Velleia, Scaeuola and Anthotium,collectively totalling more than 400 individual species.A few speciesoccur throughout the Pacific and into Asiabut this is primarilyan Australiangroup of plantsthat forms a commoncomponent ofour nativeflora. Of the 26 speciesknown within the genusLechenaultia, 20 are endemicto south-westernAustYalia. Most of these occur on the sandplainheaths and shrublandsof the SouthWest Botanical Province.There are two tropical specaes base)or herbs.They are distinguished by DIVERSESPECIES (floral lobed (L. liliformis andL. ouata),two central havinga corolla tubewith Speciessuch as weath leschenaultia Australian species(1. aphglla and petals)that is split on one side to the (L. mac'rantha\are often drawcardsfor (modified end L. Iutescms')and one speciesfound in ovary an indusium style wildflower enthusiastsand tourists (L. pollen and an eastemcentral Australia diuaricata). or cup) with two lips visiting Western Australia for the up into An addition to this is an intriguing elongatedfruit that breaks spectacularfloral displaysthat occur in grass-like The has recentlydiscovered species single-seededarticles. Eenus our bushlandduring spring. As its perennial colourful from the GibsonDesert. All are very attractive, shor,ryand common name suggests, wreath subshrubs (low with a woodY flowerswith high horticulturalvalue. leschenaultiais a wreathlike, almost prostrateperennial shrub reminiscent I PreDiouspage I Fromtop: Blueleschenaultia, of the floralwreaths used in memorial I a commoncomponent of thejarrah services.The speciesproduces large forest,can Droduce magnificent floral yellow and pink or yellow and red displaysin spring. photogenicflowers-the largestfl owers Photo- Andre$Brcv,n There are two forms of red leschenaultia of anyleschenaultia. in the wild, a prostrate forrn in the Redleschenaultia (L. formosa)is a Wheatbeltand an erect shrub near the small subshrubthat occurs in two south coast. forms in the wild. The Avon Wheatbelt Photo- Bill Bachman Wreath leschenaultiahas the largest and form is prostrate and the south coast possiblythe most spectacularflowers of (from Albanyto eastof Esperance)form the . is erect.Red leschenaultia has primarily Photo- C Sauerdckey/lrchmanTYansparencies red flowers,but yellow, orange and creamshades also occur.

I.46ole; Scarletleschenaultia is I currentlylisted as threatenedby the I DeDartmentof Conservationand Land Management, Photo- Andre$,Brown

lAboue left: Blue leschenaultia. I A numberof leschenaultiaspecies have I beenfound to be insectpollinated (though more likely by native beesthan beetles). Photo- Ann Storri€

I Zed. Heathleschenaultia. An atypical I collectionof this specieswas I mistakenlvidentified and named as a new speciesof Ericaceae. Photo- Babs& Bert Wells

24 u*rsco"e 9Z x,torsottw

'aldlupxa '(s"pro.ururl 'sanads .roJ pqlneuaqosal aql Jo ^lquapr Jo sp?rpunq ^uPul aueu pue l)alloJ ?) 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The white centre of its blue flower helpsthe beeto find the nectarat the baseof the tubularpetals. The mechanism involved in deliveringpollen to the visiting insect or bird pollinator is via the pollen indusium(or cup)in the . This structureis locatedat the top of thestyle and forms a cupwith twolips sunoundingthe surfaceof the stigma. Beforethe flower opens,pollen is receivedinto the indusiumfrom the maturinganthers as the style grows and pushesforward. The pollen storedin the indusiumis held until a pollinator visits the flower.The pollen load is depositedon thepollinator as it brushes againstthe openingof the indusiumon entering the flower. The maturing stigma then continuesto grow out throughthe indusiumready to recerve pollen from another when brought by another pollinator. In ,however, the process seemsto be slightlydifferent, with the pollenusually being depositedon the outsideof the indusium.But the specificmechanism of the processin theLechenaultia is still poorlyknou,n. ORIGINS Evolutionary studies 1nLechenaultia haveshown that the central Australian speciesand the tropical speciesmost likely have their origin in the south- west of WA. This is also believedto be true ofthe relatedgenlus Dampiera, and initial studies indicate the same for Goodenia. The South West Botanical 'hot Province is a world spot' of plant diversity, and this is reflected in the high numbers of Lechenaultia and lhe Goodeniaceaein generalthat are found

lTop left: Kalbarrileschenaultia, I restrictedto rockyledges and gulliesin I the Kalbarriarea, is listedas threatened by the Departmentof Conservationand Land Management. Photo- AndrewBrown lAboue left: Barrensleschenaultia is I entirelyrestricted to the Fitzgerald I RiverNational PaYk. Photo Babs& BertWells I fefi. A hybrid leschenaultiafrom I breedingwork by the BotanicGardens I and ParksAuthority. Photo- NevillePassmore

26 urot*ru ---

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