+t MIMOSACEAE Acacia 
Subgenus Phyllodineae - Shrubs or trees, mostly lacking thorns or prickles and with leaves modified into 
phyllodes. There are 2 groups (Sections Botrycephalae and Pulchellae) which have bipinnate foliage but on 
other characters they are considered to be more closely related to the phyllodinous species and so are placed 
in this subgenus. The majority of Australian species are in this subgenus. Pedley subdivided this subgenus 
into 7 Sections but only 3 are represented in the DR. 
Sect. Juliflorae - Phyllodes usually broad and plurinerved. Flowers arranged in spikes. About half the 
species occurring naturally in the DR belong in this section. viz. A. aulacocarpa, A. auriculiformis, A. conspersa, 
A. difficilis, A. dimidiata, A. gonocarpa, A. helicophylla, A. holosericea, A. humifusa, A. leptocarpa, 
A. oligoneura, A. oncinocarpa, A. pellita, A. plectocarpa, A. praetermissa, A. torulosa and A. umbellata. 
Sect. Phyllodineae - Phyllodes mostly flat with 1 prominent longitudinal nerve. Flowers in 
globular heads. The only representative in the DR is A. alleniana. 
Sect. Plurinerves - Phyllodes flat or occasionally terete, longitudinally nerved. Flowers arranged in 
heads. A well represented group in the DR with A. hemignosta, A. latescens, A. mimula, A, multisiliqua, 
A. nuperrima, A. platycarpa, A. praelongata and A. tolmerensis. 
L Mature plants bearing phyllodes. Pinnate and bipinnate leaves found only on 
seedlings or on “reversion” shoots on Old plant .......s.sccsssesereeeesereesereeeeees te 2 
1. Plants with bipinnate leaves only, never with phyllodes 36 
25) i Blowersan! globular heads trcrssssssctssetsteiiconsssttaseestrsasttsetesseasitssssesesusestestecosagreasconseentseerssess 24 
28 ElOWers: in Spikessvrsin ttetterssseestietestecnererestesstecitsctoectesesteetttsasessecsteveresseseeetereessseeers masta hiss 3 
3. Phyllodes'spirally twisted Ssistecssssccsrsssnsesesssetreceyistttpatescsssssestsansscsstseastepeesecesrenbassestates ees tet A. helicophylla 
3 pame Phyllodesiflat onjteretesmreersrtestressrrctsseerssetteo ttre ressratectarastartqerreretsecepaeerasacccesrelevreruieiei tere 4 
4. Phyllodes with major, often yellowish, veins running together at the base near or 
with the lower margin 5 
4PM Notas aboverinunitesscrceeaitrestinriststeceestestttritistersetzes etree rerstorsestsrecteresrestrerentt tere fiat setesictet 9 
Seem Pods coileds phyllodes notidimudiate se. -srerssssscsttesterteisttestsssereesesesressteresentecstercvetsveeresertsvee 6 
See Pods-t-straights phyllodes dimidiatessstessssssssstestisisteertartsirscssyerssetetessrovevettttescscteentoiatsests 8 
6. — Longitudinal nerves on phyllode confluent basally but free from marginal nerve; 
apical gland ‘absentia tsrsestlestrie; sistvseteceststetieritereetscecteottetertetttestratests eteeestnentererecrsper? A. mangium 
6. Longitudinal nerves on phyllode basally confluent with lower marginal nerve; 
apical ‘gland mostly: presentetisccitiscssesesccossstesescqeeresecesesrstecesesesrgeqeecrteacsrestrseetoytisernizasteses 7 
7. Mature pods glabrous; basal gland circular or oval, not conspicuously raised ............+4+++ A. holosericea 
7. Mature pods pubescent; basal gland circular, raised ..........s.sssesesseseseeseseeeeeeeeneereneeneeeeenes A. pellita 
8. Erect trees or shrubs; corolla glabrous ...........scsssscsssssssssssscessssscsssececcsesesescsssssssenesesessnsseacees A. dimidiata 
8.  Sprawling shrubs; corolla with long hairs .........c.cssesessessesesseseeseeseseeseeseeseneensneeneneeneereneensens A. humifusa 
QT Phy llodes <2-5 mim Wide trerrritjeicteceectescesessstoreceteccsetesencesrorerecescerecavecensatalcsesststereesseeasesettse® A. gonocarpa 
9. "Phyllodes >2:5. mm Wide w........c.ccccccssecesecsnssscessscneessecrgecscassososcncnecnssssnstocensescssonesssscavessastas 10 
10. Phyllodes with parallel longitudinal nerves, not anastomosing, 
or only occasionally so, sometimes ODS CULE .......sssesecssssseseeeesesesseeseseeteneecneaeeneneasenenenens ul 
10. Phyllodes with consistently anastomosing nerves (check with hand lens!) .......sssseeseees 21 
11. Phyllodes with single major Vein i......:s.scscsescsossresesesnsecsecncssssessecesssssscoonessensacnsrsenserseevencer® 12 
11. Phyllodes with several prominent major veins Or veins ODSCUIE ........ecseeesseeseesteetentesteees 14 
12. Branchlets densely pubescent ..............scccsssssssesssscsessrerecseacseceseresssscsenssersensonesssssssoesssssesoeoss A. conspersa 
12. Branchlets glabrous 13 
13. Spikes pale yellow to white; pods quadrangular, 50-90 mm long, 
broadest towards apex and tapering gradually to base ......c.csccccseseceeseseseeteseseseenensseneenens A. gonocarpa 
