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Genus Dillwynia Family Fabaceae
Subfamily Faboideae

Description: Shrubs.

Leaves alternate, simple, linear, terete, or ± trigonous, with a groove along the upper surface, [rarely almost flat with inrolled margins]; stipules occasionally conspicuous but usually minute or absent.

Inflorescences racemose, umbellate or capitate, axillary or terminal; bracts small, caducous or persistent; bracteoles small, on pedicel often distant from the calyx, caducous or persistent. Calyx teeth short or as long as the tube, the 2 upper teeth ± united into a lip, apices parallel or divergent. Petals yellow or yellow and red to deep orange-red, clawed; standard broader than long; the wings narrow, auriculate at base of lower margin; keel shorter than or equal to wings, straight or scarcely incurved. Stamens free, often attached to a ring at base of calyx tube. Ovary shortly stipitate, pubescent; style erect, thick, hooked below the apex with a truncate or thick stigma; ovules 2 on short funicles.

Pods nearly sessile, ovoid or globose, turgid; seeds smooth or ornamented, with an aril.


Distribution and occurrence: World: c. 40 spp., endemic Aust., all States except N.T.

This genus is under revision.

Text by P.H. Weston & P.C. Jobson
Taxon concept:

Taxa not yet included in identification key
Dillwynia crispii,    Dillwynia phylicoides A.Cunn species complex,    Dillwynia retorta (J.C.Wendl.) Druce species complex,    Dillwynia rodwayi

 Key to the species 
1Leaves distinctly spirally twisted.2
Leaves not twisted or rarely slightly so.8
2Inflorescences terminal and/or in the upper axils, racemose with 1 to several flowers, often pedunculate.3
Inflorescences axillary, consistently 2-flowered, ± sessile.
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3Leaves covered with rather stiff hairs or, if almost glabrous, with a few stiff hairs only near apex; calyx glabrous externally or with a sparse to moderate cover of stiff hairs.Dillwynia phylicoides
Leaves glabrous; calyx glabrous externally, usually shortly ciliate with weak hairs.
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4Erect to diffuse shrubs 0.5–2.5 m high.5
Weak ascending shrubs <0.5 m high.
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5Leaves mostly >5 mm long; widespread, north from the Budawang Ra. (NC, CC, SC, CT, NWS).Dillwynia retorta
Leaves mostly 1–5 mm long; restricted to the Cumberland Plain, and to Douglas Park (CC).
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Dillwynia parvifolia
6Peduncles 5–15 mm long; widespread, grows in heaths and open woodlands (NC, CC, CT, ST).Dillwynia sp. trichopoda (Maiden & Boorman s.n. NSW 40290)
Peduncles 11–28 mm long; restricted to alpine swamp margins (ST).
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Dillwynia palustris
7Leaves flattened or trigonous in section, branchlets with long spreading to antrorse hairs; on coastal sand and sandstone, north from Ulladulla (NC, CC, SC).Dillwynia floribunda
Leaves terete or almost so, branchlets with short appressed hairs; on rocky sandstone ridges from Port Jackson to near Rylstone (CC, CT).
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Dillwynia elegans
8Calyx tapering gradually towards the base; petals not persistent in fruit.9
Calyx abruptly narrowed at the base; pods surrounded by the persistent remains of the petals.
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9Calyx tube hairy.10
Calyx tube glabrous.
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10Inflorescences with peduncles 0.5 mm or longer.11
Inflorescences with ± sessile flowers or peduncles <0.5 mm long.
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11Lateral stems and branchlets spinescent.Dillwynia ramosissima
Lateral stems not spinescent.
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Dillwynia hispida
12Leaves mostly <10 mm long, smooth to sparsely warty.Dillwynia sericea
Leaves mostly >10 mm long, strongly warty.
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Dillwynia rudis
13Prominent decurrent leaf bases absent.14
Prominent decurrent leaf bases present.
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14Leaves with apex strongly hooked (as opposed to apex recurved)15
Leaves with apex ± straight (sometimes recurved but not strongly hooked).
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15Inflorescences 1–4-flowered, corymbose on peduncles >3 mm long.Dillwynia glaberrima
Inflorescences 1–2-flowered, at the end of lateral branches on peduncles <3 mm long.
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Dillwynia tenuifolia
16Plants prostrate.Dillwynia prostrata
Plants erect.
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17Inflorescences 2-flowered; on rocky sandstone ridges from Port Jackson to near Rylstone (CC, CT).Dillwynia elegans
Inflorescences 1-flowered; known from the Windellama, Michelago and Numeralla areas (ST).
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Dillwynia glaucula
18Stipules present; inflorescences 2-flowered19
Stipules absent; inflorescences 1-flowered.
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Dillwynia sp. Barren Grounds (Chadwick s.n. NSW 39509)
19Stipules 0.5–1.5 mm long; grows in swampy heaths.Dillwynia stipulifera
Stipules 0.1–0.5 mm long; grows in heath near escarpments.
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Dillwynia cripii
20Leaf apex either obtuse or if acute without an obvious sharp or pungent point.21
Leaves with an obvious sharp to pungent point.
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21Inflorescences sessile, dense, terminal heads.Dillwynia brunioides
Inflorescences racemose, corymbose or single-flowered, terminal or axillary, never forming sessile, terminal heads.
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22Flowers pedunculate; bracteoles narrow-lanceolate, caducous; from between Deniliquin and Moama (SWP).Dillwynia cinerascens
Flowers sessile; bracteoles broad-lanceolate to ovate, persistent; known from near Bathurst, Yass, Canberra and Tarcutta (CT, ST, SWS).
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Dillwynia sp. Yetholme (P.C. Jobson 5080)
23Leaves terminated by a distinctly pungent point 1–1.5 mm long.24
Leaves terminated by a sharp but not pungent point 0.2–0.5 mm long.
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24Leaves sessile.Dillwynia juniperina
Leaves with short yellowish petiole, 0.4–1.2 mm long.
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Dillwynia sieberi
25No obvious leaf base scars; standard 7–9 mm long; from the Goulburn R. to Bargo (CC, CT, CWS).Dillwynia acicularis
Obvious leaf base scars present; standard 9–12 mm long; from Gibraltar Ra. to Ebor district (NT).
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Dillwynia rupestris

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