'rcneqcg otoy[tcnodoazuny 1o ut(uouKse D.llolpoi DazunXpuu ]ancqcs ,ar2lssptd Dazunxx slet1 opuncnf oazuny lo prrq,{qe,rpulnd r se urnasorDazunx pa:ll (966I) uelleoJ ,{lluenbesqng zaztrttl Jo sarJodseq ol pejeprsuoceJo,r uonuu xDxe uodn pu€ (HJUAd) rrInr.IEqJoHUEIIBJISnV uletsel[ eqt t€ petEcolera^\ sarcedsqtoq:o; sqderSoloqdedfl Zg8l uI paqucsepqtoq' nrnlwnllolprat d puu zJJnI wnasol 'd 'outw(locua4 Jepun seur€u satceds.requn; o,,trlslsll (166I) uerudeq3

'senssq ur?ls Jo sorpnts lt?rtruolsuEpue elep 1ucr3010qtlotu;o sts,{1euellcllsllels papnlJul uoneSlse,lut '(g36y) srql exul ,^eu o,t,itJo snlsls oql aururetep ol sEIIe,r sE uosduroq; ,4q,{rufuoufs ur peculd cJa,r qcrrl^\Jo qloq'unpunquo : 4 pue sadtsso.tcowwKlDJuad Jo srpts oql ssasseerol ue{euepun ueeq e^uq {Jo,^i\plerJ oArsualxo pLte DutwIlDJuad Jo lPr]elcu urnuIlqJJqJo uoDeuruPxsIE]rlrJJ

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lJerlsqv

'dnturiurt,l 8SZ9rrFIsnV uralseA leors urxig 'tucura8ru!l\l 'uorsr^rC puc'l pur uolle^rcsuo]Jo luaurtrpdoc JruelrSt1l'lVl

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(cerreltf,;,\I) o,uMf,IDruad snua8 eql Jo uols!^er V

G66t)aZ- L:(I )tI DlstfnN NuJtsiaYol. 13, No. I (1999)

Methods

Measurements were takenfrom dried material,detergent-softened where possible. All taxa have been studiedin the field to record habit and habitatdata, as well asflower colour. voucher specimens have been Iodged at PERTH.

Stem tissueswere examinednicroscopically using preparedstained cross_sections. The number oflarge open vessels was comparedwith the number of thick-walled fibre tracheidspresent for each sample.

selected populations of Pericarymma,including thoseshowing the extremesof variation in the charactenbeingrecorded, wereinvestigated using Anarysis ofvariance (ANoVA), a statisticalmethod toestablish differencesbetween populations and within (species)populations. This study was based primarily on the analysisofthe meanlengths of the bracteoles,although others characterriwere tested (Cranfieldunpublished).

Material housedin PERTH was examined,incruding a photographof the type of pericaLymma pericarymma .floridum. The type material of elripticurnwas borrowed from w and a photographic record retained pericaLymma at PERTH. The type of cras. pes was located but not seen. and assumptionshave been made basedon the type description.

Localities recordedon all availableherbarium collections were used to producedistribution maps, but vague and general localities have not been mapped.The conseryationstatus of a speciesand infraspecific taxa has been assessedand coded where appropriate,according to the Departmentof Conservationand Land Management'sConservation Codes ior WesternAustralian Flora.

Morphology lllabll. AII speciesare shrubsless than 3 m tall. The original descriptionsindicatethat periccrlymmct ellipticun grows to 3 m. This study found that throughout the spicies range the maximum height attained was usuallyunder 2.5 m. Two speciesappear to attaina heightless than 0.45 m and have inflated gnarled erector stems. All specieshave dichotomousspreading branchlets with various leaf densitiesand clustering.

Srems. Severalspecies have inflated or swoilenstems with softbrittle tissue and are usuallv sinsle- stemmed. Onespecieshasnon-inllated stems with hardertissue that is structurallystronger. Thi-s is usually multi-sternmedat ground level.

Leaves. The leavesare simple and subsessile.The lamina is from l to 12 mm lons and is flat or conduplicate. The considerablerange of size anclshape of the larger leavesis depictedin Figurc 1. All leaves aredrawn at the samemagnification. The leafshapesare generally nanowly obovaie with the exception of one sample which has large obovate leaves and correspondsto the new species Pericalymmamegaphyllun. The midrib is obvious mainry in specimensthat representper iroiym*o ellipticum pericalymma andrs not vislblein crassipesarthough varying degreesofribbing can be secn in the other two sDecies. ',(teuD,{ sql sezuelr€rEqct€ql elntpeJsrqt sr lr pus sra,,noglsa8rul aqt sELluotprto LI set wnc4dt11aoww(locua4 runrqluedfq eql o1see:Bep 96le peluese:dpue e8rel eq ol puel qcrq,r slctod elrq,,n:olurd e,reqawa(p)l1ad Io s"eeds:eqlg rnoloc ur elrq,r qsruee:Bern pue',{pqBqspellorureqolpuolpuellcrusoruqcrq,rsleledsuqsadrssotctnaut{p:t:rla;r.Buo1ruur9o1 I luoJJSurSuer'ezrs pu€ uorleluesaidur uorleuu.lluer8,noqs s1uladeq1 .,(le,rrssoccnsuedo sro,,rrog 'srred eql ur ueql6 slolqcm:q eql Jo xedv aql uo sre,nogalrsses o,$l to euo ^llEnsner? oJerll .sra olJ

'stamog Surdole,tepeqt lcelord ol pergrpotuse^pal eql pue po,trols sr lueurdola,ropgeal eql qatq,r ur uonuqrurpnq lo,rolJ Jo tlnsoJe sr uolll4dEpEsrql luerudole,rap JoJpelurtrur lEJolJ sr so.rntJntlse^uele8e^.]o uouetdrpu uDtgql Surlecrpurseloalcurq ot sa^€ellpJou qBnorqlsa,trol ,serceds e,utela8e,roq1;o pue.l1pluerudolo,r.ep eq1 3ur,,noqs 1p sluese:dor3 e:nBrg

'ourw(ptcua4 1o seydurs e,lqeleBe,t1o ^trluapr eql Buturur:e1epur .1uese;d preur sr pesneq uuJqrnl plo uo stcuq oqlJo acuolsrsJodeqJ enssqcqaqlu,{soloqd a,ruq ,4eruseeurlsur aruos ur putrse^ual leJou Jaddn eqt qI,tr pasnjuo' oq ol puol sJc'rqr?^\ol oqJ .ssaurJrpr{ '3uo1 'olessncep.snouuJquetrt ;o soorSep3ur,{rul q1r,n urur g-1 .olplo ele saloolcuJqeqJ ,sapapDJB

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";i:,:,:Xi::,,,:i-'';"':ilillfr,;:,,:,Y",,'{,,{; u,l:)tttri, d - a' lnlftttt';td,t.t - ) ittlnotituodt, - r',"r,",,,," A oa a llLxr I A .l)ilo IJ s V ^A d ffirr v vrn v A t't\ A,4 A 0t) "VV

.ple!]uBr:l .t.X DwwllDruad snue8 oqt Jo uorsr^er v Nll)r.fld Vol. 13, No. I (1999) A "400 t/l,l {ltn^ )/ \i/o ]'" il \-'r v t; frfr&mfr

Figure2. Morphologyof A - vegetativeleaves, B - floral leaves,C - bracteoles.

Geographicaldistribition andhabitats

Thedistribution ofthe genssPericalymma, as shown in Figure3, extends from Catabyin thenorth to BremerBay in the south-east.Within this areathe speciesare restricted to habitatsassociated with various wetland types or drainagechannels.

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i''-T-\;t,s1 \N\ \\J WESTEANAUSTRALIA YI THE SOUTHWEST \ ;.",IN o------rg-l9l-eo

I \i:itiit Hflffi# i liiti::l

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Figure 3. Distribution of Pericaltnmo. 'utnpuo;[ ,suawnads 11puu unt4d41a 4 peu.[ue]s -preqeql 8uo!u€peztuSoce: uceq peq serrodso,ri,tlsnor,ter4.serceds^ ouo u[ql eJotuolur peleredas eq ol sccualeJJlpluertrjJnsur lnq ezrsrc.log ur flrlroeue,r eulos pe,\\oqsloql suarurcedsge1 srepJo; unuEqleq tunc4d41aDlttwAlDJtDd eql ruol.l stuels peluuur qlr,^\ser:rcds eql JiuJo uolcururrJ8

'PxEl eql ltr u,)llctudJs IOJ sll^\ .talJr:lILIc qcco ln]a:^n ^\oq el?Jlsnllr .(s14ed ,se1oelor:q,sa,rra1 ol tno perrJxJse,{\ sJeltu[qc a^r] eseqtJo Surqdu:3uo8flo4 put:sledas 's3^83[ ll]loLl 1os-qt3u?l ?8EJe^r) pcjoJS eJe,r sJctJc]rqJ o^rJ rlJrq,{\ur qcuordcln:oqloue perrnbaj '(rcded IF srqlur pequcsep sorccds,treu o,,r1oqt) sarcads o,rt Butu'ruc.roql;o uorlr:tdcg sarcedscuo ueql oJorulo uoqru8oJelpouoddns srql :uorlllJJur uIals Jo utjo-+euroJtxo tsoru oqt polroqs osln suorlelndod osorlJ JJpuroLucJoqt ruo.q1ue.ro.11qt ,{puror.lru8rs ela,r (rr.r.rsrr,/Jdr s-orJods 3qt qlt,&BurpuodseroJ) suortnlndodlxJa^estrqtpcluJrpursoloclJtrq-;orpBuclSosts,{1uuul?cDsq|ls,xrllJutl4p,lBwpnlcxg

',{eI ,unryhIa r ur poi-neq plnoJleql JetcruuqJlnlesn u pcprro.rduorlu^Josqo stq1- t)utut[lD)11t)dlo surolspelrLlur-uou cql sluose'lde.lod,{l onssrl]cpjltq Jasuopcql eJrq,r,sorJeds p?rlJl'rpLflr rrr,1r.r.r?r../;) DutruLlD)l12d )o vt?li- palrLluraqt o1spuodslrroo ad,{1 cnssrl snorod u?doelDuq .srucls aqJ i-uorsr^rpscrsccls pesodojd cqt Jo ouo o1puodsaj_roo qJrq,r petcllur-uouJepJcrl crll prrr 'i^cd,(t pclrUulUos oqt ulelslri^rq o^,\1 ql!^\ prtrleJJoJ sorlssrt pa,^.lcs-qo ?seqJ .,{11rrorl.rodns pczruBocar .qnciun,p1ar.Jun.r3 cq Plnol i-cd,{1onsslt l.urlsrp turlt pcll,crpLrr s[lcts ,r.rzqrrl./r/ lo aBurrt] Jo (srseqt .untt.tt.t;ttlso1da7.lo ur pctiodoj) t66J ur polcnpuoasuonu3n;^c,rur ll?lnuoluuv i^?rJodsjcqto qll,r 'lt,(lts"-D.o pclDdruocuorl,r luo.nlciclr-'ejc,,r"^c.rn1uej cnbrun cruos 1uq] pcleJrpul ptn] tuntuJ)dIolda1sr.l r'adtsr'Di) Du u{lD)tra.7.;o {urolrur ruclsualloms cql iurpirlsc,lurlcdudn pcqsrlqnrj1tt6r1.1 suug

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.luascrd 'sor spuq.{qtprlr soru rlc[los^ Jccls.Joarn]x(!rc c^rq ol pcpuolsrauJuq :-r.tol^qo ou Lllllr s^tullqcq uor.l ?sorll clrqt\'sa r.od)- '[t.ro clSu ts I Jo c r lruncq ol pepuclsJcllloq lu rquqpcr s,{qd ,{q palcr.rlscr suot1u 1ldo.1

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'sltos la,rur8cqr:ap1 Sur8ulg qlr,tr pcterf,ossn ill; asaqJ gd,nol n pur aoelns ,slEJJ ,{pcd e qI,tr spucspeqJraI cJEsJroS lctr:.r qsa4 r0r,r uorll]punurIeuosres ot polJeiqns fdrur,rs o^rsserJnsqlr,^\ surpld .fitlqDLl ol seunplclurfdun:,rs ro sl?elrpcuttJp f1:ood Bur,{1-,r,o1 Z atliJ

'seou;.urs,{1uod urql qtr,\tspurs p?rlccol ,{llrnsn eru slros srojc uoUEpunurpelulJossB qlr,{\ .tDltqLry scrpoqJaln,r luJuEuued-[ues :o luauuuuediurBLu]J [ ad{J

'u,r\onlun sl luarudolelep sIqlJouorloorrp eql qBnoqtp'srorlloeqt ol ad,{tIectSolocc euo uo{ pe,\\olloJc^Bq,{uur sotceds aq1.;o lueurdole,tep,{.ruuonnlo^A ,{\oieqpcqrJJsep ert qJrq,,rrstqrqeq;o secl{1ee:ql asoqtslrrdapya.tn8rg 'sadfl crsuqaarql ert ?rctpqJrq,{\Jo slelrqtq olceu puuolJ[u snorJr]Aur JnJJo sorJe ds nwtutlouta4

Dutut{tDrtlad qorsr^ar !ptsrJu'r:) snu.3 :qt Jo v tU l2 Nuttsiayol 13, No. I (1999)

Figure 4. SchematicPericaLlmma habitats. Pc = P. crctsipes, Pe = P ellipticum and Ps = P. sponSiocaule,A. - Type I habitat,fringing permanentwater bodies. B - Type 2 habitat,seasonally flooded low plains C - Type 3 habitat' elevated seasonallyflooded areas.

Taxonomy

Pericalymma (Enctl.) Encll. (Endlicher 1840: 1230). - I'eptosPermumsect. Pericalymma Endl. (Endlicher 183?: 51). Type: lzptosperruum ellipticum Endl. l=Pericalymma ellipticum (Endl.) Schauerl.

Dwarf to tall slrrrrrs, branchletsdichotomous, flextose. Leqves alternate,subsessile, entire, coriaceous.Flolvers terminating short branchlets, 1 or 2 per branchlet;bracteoles usually 4, opposite 'punoJaq uel radrssotcowwQocua4 qcrq,,n:epun se8pes 1p1,(q pelrunuop ,(lpnsn ere slelrqeqeseqJ pepoog ,{lpuoseespup crpn€ arc qarq^\ }uoluoJl?ed q8rq qtr,trslros ,{puus qlr,{\ 0€lrq€q Z od,{1) sdrue,trsrelr,tr qse{ ll4seocuo ,{lurEruSutuntcg totlqog

(Vg ern8rC),(urq1y reauqcreg s.{1eg ol etsn8nvreeu ureld ra,rrg ots cql ruo{ erleJlsnv uelseld tse,r-qtnosplseoc ur srnccosadrssrut oww(1Dclrad 'uounqulst1

'u 'D'N '2961 'uor1tun1 s tuDqrlDW 8ny g puElplhtrJo N '{oorqslln8: 'AS'Z16l .tco/l ,{I?d llsroetrDf cac'telul ur.rrl:tr FDlul.uoHC g,Z66I l€uorluN '868 ',(uEqlv:9g06 fBg rljerTIr./\\: a s (gro9 I IrO'punos o8roa08ur) : a spztlrd g sldle'106l qeC (oqox 'Ja{r?g eTna![uDt, TU't66I ^oN ZI tunot! JoS ux46'II'.E66|KDqDX'eq pplluDlJ'fA '€661 '{rrd ^oN t IeuoltuN ra^rg uocs :VI-1VUISnVNUgIS1t1''pawtuDrasuaurcadspalcalag

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'clu,roqo alnurorBuods'd ( q3rqur 9 1 ol qnrqs) runrLZ-[Ox O L-g I ,{1,{o::uusa,rucl '3uo1 urutg 1-1 1 stueunllJuorlrEls:8uol turu / €-l Z scloolJejg t '4 .' run11,{qde8aur ( q3lq lu St 0 ol qnrqs) rulu0 g-l Z x Zl-t'als^oqo se^Dol '3uol ulur g0 t 0 stuolrrElrJueu€ls:3uol u[u gZ / I seloatJplB t lcojc sruols:pallojurlou'{urd ol olrq,r'3uo1ruur E-1 7 s1r1a47 sadlss"rJ'd ( q8rqur 91 6o1qn:qg) pelruu3suals .7 :FDqBrlspclloJur surS:eru'e1rq,r qsrueeJ8 ol oltq,r'3uo1ruur 7-g 1 s1nla; 'uollo^\s snorodpuE lJos enssrluels sulals urEhtr I 'uello,rs,{lsnor^qo runrpdllla'd ( qSlqu t ol qnrr{S)rurrJ enssn uols tou suals urpntr l

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'pteUurll .IU ouuQDrtlad snuag eqt Jo uorsr^ar V ,Vll}/ria Vol. ll. No. I (1999)

A

'\ PE .'"{l*

Bu rM\e qr.dffi J

L\ \ \ 1

D \ PE h) ,Niu"l

e*t';3 I Bun+'tti:j\ B' qt_ BU lL' \\ / l::i:iiP 'i-rl \\ I I Il"

Figure5. Distributionof Pericalymmaspecies and varieties. A - P, crassipes,B - P. ellipticun\ar, ellipticum, C - P, ellipticunvat. Jloridum (stippled) and P. negophtllaa, D - P. sponSiocaule.

Flowering period. October to November.

Consemationstatus. Not consideredrare or endangeredalthough occurring in restrictedhabitats.

Norer. The flowers ofthis speciesare small andhidden amongthe sedgesindicating that a specialized pollinator is involved or that selfing occurs.

Pericalymma ellipticum (Endl.) Schauer(Schauer 1844: 120). - Leptospermumellipticum EndL (Endlicher 1837: 51). Type: King GeorgeSound, [Westem Australia],1837, Huegel (holo: W ).

SftraDto 3 m high. Stemserect, multi-stemmed, not obviously inflated and hard to fiJm. Leaves scatteredto denseon branchlets:Iamina oblanceolateto nanowly obovate, 3.5-l1.3 x 0.6-4.6 mm, glabrous to sparselyhairy, flat to shallowly folded, venation obscure, apex acute and sometimes reflexed. Floral leayes4, sessile,oblanceolate to ovate,2.0-6.6 x 0.2-1.5 mm, glabrous with basal membranouswings, apex acute to obtuse. Brqcteoles 4,2lowet and 2 upper, ovate, 2.0-4.6 x 1.2-4.0 mm, greenishbrown to light brown, glabrousto sparselyhirsute, margin glabrousto sparsely ciliate, apexacute to obttse.Hypanthium 1.5-4.0 x1.75-3.0 mm, glabrousto sparselyhirsute. Se2als (L arn8rC) urur 9 g , Z x 0 9-g t sluad

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Selectedspecimens examined. WESTERN AUSTRALIA: intersection ofVahland Ave andSouth St, CanningVale, 16 Oct. 1993,R.J. Cranfield s.n.',1.3klrLW of WolkaRd off CooljarlooRd, W of Brand Highway,27Oct. 1993, R.J. Cranfield & D. Kabay897 4:25 km E ofBrooktonHighway, 2 Dec.1993, R.J.Cranfield & D- Kabay9108;NW comer of Twin SwampsNature Reserve, S ofMuchea,24Sep. 1992,E.A.Grffin 6810;SEcomerMooreRiverNational Park, NW of Gingin,17 Oct.1992,E.A. Gnffin 7286;Kelmscott, I I Sep.1897, R. I/elzs s.n.

Distribution.Pericalymma ellipticum var. floridum appearsto occurin two mainareas, one north of Perthand the other around the Busselton area, with a scatteringof populationsbetween these areas. It alsooccurs around Albany. (Figure 5C)

Conservationstatus. Not consideredrare or endansered.

Pericalymmamegaphyllum Cranfield, sp. nov.

Pericalymmacrassipes et Pericalymmaspongiocaule affinis sed foliis majoribuslate obovatus differt.

Typrs. Scott River, WestemAustralia, 4 November1993, R.l. Cranfield8996 (llolo: PERTH 0371.5442:.iso: AD,BRI, CANB,Curtin University, HO, K, MEL,US).

S/rrabto 0.35m high. Sr€mserect, inflated and soft. Leavesalternate, scattered along branchlets; laminaobovate, 4.0-l1.8 x 2.1-5.0mm, glabrous,flat, midrib visibleadaxially, venation obscure, marginslightly undulate, apex obtuse to acuminate.Floral leaves4 or absent,sessile, narowly ovate, 2.1-3.3x0.2-0.7 mm,with membranousbasal wings, apex acute and reflexed. Bracteoles 4,2lower and 2 upper, ovate,1.7-23 x 0.6-1.4 mm, light brown, glabrous,margins ciliate, apex acute. Hypanthium1.5-2.0 x 1.7-25 mm, glabrousto sparselyhimute. Sepalsdepressed-triangular, l.G-1.4x 1.1-1.6mm, glabrousto sparselyhirsute, margin sparsely ciliate, apex acute and hooded. Petdlswhite or pink, broadlyovate, 2.1-3.8 x 2.0-3.8mm, marginscrisped, apex obtuse. Stamens filaments0.4-0.5 x 0.15-0.16mm. Anthersovate, 0.4-0.5 x 0.44.45 mm. Ovules0.4{.6 x 0.15-0.2mm. Style1.0-2.0x0.25 nuIL. Fruit 3.0-3.5x 2.0-2.5mm, glabrous. S?eds obovoid, not seenat maturity.(Figure 8)

Distribution.Known only from typelocation. (Figure 5C)

Habitat.Orly knownto occulon a Type3 habitatin anelevated washed area with redbrown, lateritic, clayeysand.

Floweringperiod. November.

Conservotionstatus. CALM ConservationCode for WesternAustralian Flora: Priority One.

Etwology. Namedfrom the Greekmega-INgeandphyllum -leat, in referenceto therelativelylarge broadleaves,

Note. Furthersuryeys and studies of this speciesare required to establishits relationshipsto other speciesand to determineits ranking. '(arnrlluru, p.as O :urnrraou,48pur unrqlundlqJo SI - d :ueu?ts g :srer',\ou 'ecuarsalouul plo pup 3uno,( O :saloatrerq- C :se^relFloIJ g :s"^Net- V ott{ttdD8awDaru[tn]uad 8 arn8tJ ,.'rl ,uu.L@,

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Pericalymma spongiocaule Cranfield, sp. nov.

Pericalymmacrassipes affirLis sed planta elatiore floribus majoribus petalis margine crispatis altiterapplanatis differt.

?yprrs.Mount Barker,Westem Aushalia, 12 November1993, R.J. Cranfield9085 (&olo; PERTH 03755673:iso:AD, BRI, CANB,Curtin University, HO, K, MEL).

Shrub to 1.6mhigh. S/€msstraight, erect, inflated and soft. lzaves scatteredor clusterednear endsof branchlets;lamina narrowly obovate, 1.8-7.0 x 0.7-2.7 mm, glabrous,partially folded, venationobscured, oil glandsobvious, apex acute reflexed to straight.Floral leaves4, sessile,obovate, 1.0-4.5x 0.1-1.5mm, with membranousbasal wings, apex acute. Brqcteoles 3 or 4, 1 or 2 lowerand 2 upper,opposite and decussate, sessile, ovate,2.l-3.7 x 1.1-3mm, light brown,hirsute to glabrous, marginhirsute,apex acute to obtuse.Hypanthium34x2-3.5 mm,hirsute. Sepals broadly triangular, 1.1-2.4x 0.9-1.8mm, himute, margin ciliate, apex acute and hooded. Pelah whiteor pink, obovate to ovate,2.5-5x 1.8-3.8mm. Stamenfilaments 1.1-1.6 x 0.1-0.2mm. Anthersovate,0.45-0.5 x 0.3-O.45mm. Ovules 0.35-0.70 x 0.15-0.35mm. Srylel-2.25 x 0.25-0.35mm. Frait 3.0-5.5x 2-3 mm, glabrousor hirsute. Seedsobovoid, 1.2-2. x 0.6-1.0 mm; testablack to dark brown. (Figure9)

Selectedspecimens examined. WESTERN AUSTRALIA: ScottRiver National Park, 4 Nov. 1993, R.l. CranJield& D, (abay 8995;6km Nof Wellstead,T Dec.1993,R.J.Cranrted & D. Kabay 9163 l7 kmNW of CheynesBeach, S Dec. 1993,R.J. Cranf;eld & D. Kabay918911.5k:nw of Betty'sBeach, 8Dec. 1993,R.,/. CranJield & D. Kabay 9199a;3km E of BlackwoodRiver Crossing on Brockman Highway,Augusta to Nannup,3 Nov. 1978,G.J. Keighery 1878; Scott River, E of Augusta,21 Sept. 1.973,E.C. Nelson ANU17302; Blue Waters,Collie, 31 Oct. 1979,R.A. Safrrey 1750; Stuan Rd, 1l miles[17.6 km] fromjunction with Pemberton-Nannuproad, 15 Oct. 1968,J.W. lVrigley s.n.

Distribution.Pericalymma spongiocaule occurs from Cataby near Juden to Wellsteadeast ofAlbany. (Figure5D)

HabitaL Occruftingin Type 1 andType 2 habitatswith sandypeaty soils containing some lateritic gravel.

Floweringperiod. Octoberto January.

Conservationstatus. Widespread, not consideredrare or endangered.

Etymology.Named from theLatin spongiosus- porousand caale - stem, in referenceto the soft, swollenstems.

Noler. In bothofitshabitats Pericalymma spongiocaule overtops most associated species displaying its largerand showier flowers above the surounding plants. This suggests that this speciesis insect- pollinatedwith little selfingoccuning, possibly creating considerable genetic variation within and betweenpopulations. 'paas - Jo s^\3t^ o^\t D :saln^o pue el^ls Jo s^13I^o^\l J - - - ornSrC :sueuEls A :Fted C :.te^louplo J :re^lou 8uno,{Jo uoDod g :sa^Pel V a\DntSuods DuutlDxLtaa' 6 Iffiffic

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Acknowledgements

This revisionis the culminationof a Post GraduateDiploma in NaturalResources project, undertakenatCurtin University ofTechnology, School ofBiology, Bentley, Western Australia. I wish tothankboth my supervisors,Dr ByronLamont (Curtin University) andDrNeville Marchant (Westem AustralianHerbarium) for guidanceand encouragement during this revision. Mr paul G. Wilsonis acknowledgedforhis Latindiagnoses, Dr TerryMacFarlane, Dr BarbaraRye and Mrs J. Wheelerfor adviceand suidance.

References

Baas,P. (1977). The peculiarwood struclwe of Leptospermumcrcssipes Lehm. (Myrtaceae).tnternational Association of Wood Anatomists Bulletin 2i 25-30. Bentham,G. (1867). "Flora Australiensis."Vol. 3. (Reeve:Londoo.) "Australian Chapman,A.D. (1991). Plan! Name Index." (AustralianGovemment Publishing Servicei Canbena.) "Genera Endlicher,S.L. (1836). Plantarum:ordines naturales." (Publisherunknown.) Huegel,C. (1837). "EnumeratioPlantarum." "Flora Rye,B.L. (1987). Myrtaceae.1nr Marchant, N.C. el al. of the perthRegion." Vol. 2 pp.31,1429.(Department of AgriculturerWestem Australia.) "Plantae Schauer,J.C. (1844).Myrtaceae R. Br. 1nr Lehmann,J.c.C. preissianae,"Vol. 1. pp,96-159. (Meissnerl Hambu.g.) Thompson,J (1983). Redefinitionsand nomenclaturalchanges within the Leptospefthumsuballiance of Myrtaceae. Telopea2t 379-383. Toelken,H.R. (1996). A revisionof the genusKunzea (Myn^ceae\ 1. The WeslemAustmlian section Z€dn uk. Joumal of the Adehde Botanic Cardens 111 29-106,