1	"Plants with reduced, scattered leaves with a maximum length under 2 mm"	2
1	"Plants with obvious leaves that are usually crowded and longer than 2 mm"	3
2	"Fruit not woody or persistent; leaves to 1 mm long"	"Lechenaultia aphylla"
2	"Fruit woody, persistent; leaves more than 1.5 mm long"	"Lechenaultia divaricata"
3	"Corolla tube forming a complete, erect cylinder"	4
3	"Corolla tube open to base on the adaxial side"	13
4	"Corolla tube gibbous on adaxial side"	5
4	"Corolla tube not gibbous"	7
5	"Sepals more than 7.5 mm long"	"Lechenaultia chlorantha"
5	"Sepals less than 6.5 mm long"	6
6	"Stems with curved downs tips; tangled, shrubby habit"	"Lechenaultia linarioides"
6	"Stems without curved down tips; prostrate or shortly erect habit"	"Lechenaultia formosa"
7	"Plants hispid"	"Lechenaultia hirsuta"
7	"Plants glabrous"	8
8	"Plants wreath-like, procumbent herbs; corolla lobe wing 4.5–8.5 mm wide"	"Lechenaultia macrantha"
8	"Plants not wreath-like or procumbent; corolla lobe wings less than 4.5 mm wide"	9
9	"Sepals more than 16.5 mm long"	"Lechenaultia longiloba"
9	"Sepals usually less than 7.5 mm long"	10
10	"Fruit less than 7 mm; corolla 17 mm long long or less"	"Lechenaultia tubiflora"
10	"Fruit more than 12 mm long; corolla 17 mm long long or greater"	11
11	"Corolla lobe wings 0.1–0.2 mm wide; sepals less than 5 mm long"	"Lechenaultia acutiloba"
11	"Corolla lobe wings more than 0.9 mm wide; sepals more than 5 mm long"	12
12	"Articles 5–8 pairs"	"Lechenaultia superba"
12	"Articles 10–20 pairs"	"Lechenaultia laricina"
13	"Plants papillate (leaves, sepals and ovary)"	14
13	"Plants not papillate"	15
14	"Sepals less than 5 mm long; corolla less than 14 mm long"	"Lechenaultia papillata"
14	"Sepals more than 6 mm long; corolla more than 16 mm long"	"Lechenaultia magnifica"
15	"Plants grass-like herbs"	16
15	"Plants subshrubs or non grass-like herbs"	33
16	"Sepals all of equal length"	"Lechenaultia juncea"
16	"Central sepal longer than others"	17
17	"Plants decumbent; leaves lanceolate to narrowly elliptic, 1.5–5 mm wide; articles 0.7–1.4 mm long, short-oblong to elliptic, less than twice as long as wide"	18
17	"Plants ascending to erect; leaves filiform to linear or very narrowly lanceolate, up to 2.1 (–3.0) mm wide; articles 2.0 mm or longer, elongate and irregularly cylindrical or irregular in shape, more than twice as long as wide"	31
18	"Leaves hairy"	"Lechenaultia pulvinaris"
18	"Leaves glabrous"	19
19	"Sepals less than 2.5 mm long"	"Lechenaultia subcymosa"
19	"Sepals more than 3 mm long"	20
20	"Leaves adpressed to strongly upheld"	"Lechenaultia galactites"
20	"Leaves not adpressed or only incurved"	21
21	"Style more than 11 mm long"	22
21	"Style less than 10 mm long"	23
22	"Leaves mostly 2.5–5 mm long (upper leaves to 8 mm long); flowers 19–28 mm long, mauve-blue, adaxial (upper) corolla lobes erect, twisted at their base and incurved"	"Lechenaultia orchestris"
22	"Leaves 7.5–13 mm long; flowers 13–19 mm long, white to very pale blue, adaxial (upper) corolla lobes widely spread and held close to the abaxial lobes giving a fan-like appearance to the flowers"	"Lechenaultia stenosepala"
23	"Corolla predominantly blue"	24
23	"Corolla pale yellow to orange-yellow to white"	30
24	"Sepals to 4.5 mm long or less"	25
24	"Sepals 4.5 mm long or greater"	26
25	"Leaves on non-flowering stems crowded and scattered on flowering stems; fruit to 22–29 mm long"	"Lechenaultia brevifolia"
25	"Leaves all crowded; fruit 11–18 mm long"	"Lechenaultia floribunda"
26	"Style more than 9.5 mm long"	"Lechenaultia heteromera"
26	"Style less than 9 mm long"	27
27	"Ovary less than 6.5 mm long"	"Lechenaultia expansa"
27	"Ovary more than 11 mm long"	28
28	"Virgate, few branched herb; interior arid distribution"	"Lechenaultia striata"
28	"Weakly erect to spreading, moderately branched shrub or subshrub; southwest distribution"	29
29	"Stems fleshy; corolla thick and artificial in appearance; flowering late spring or early summer"	"Lechenaultia hortii"
29	"Stems mostly woody; corolla thin; flowering peak in later winter or early spring"	"Lechenaultia biloba"
30	"Articles 10–13 pairs; sepals to 4.5 mm long or less"	"Lechenaultia lutescens"
30	"Articles 16–20 pairs; sepals 4.5 mm long or greater"	"Lechenaultia striata"
31	"Corolla 9.5–19 mm long, pale mauve with a white throat, lacking any yellow markings; articles simple, elongate and irregularly cylindrical, with a low, elongate furrow on each side"	"Lechenaultia mimica"
31	"Corolla 9.5–25 mm long, usually either rich dark purple, pale mauve, pinkish or white, with yellow markings; articles complex, in side-view consisting of a thin plate with a ‘cushion’ on each face, each cushion raised to a thick diverging short spur at each end, to create a more or less trilobed apex at each end"	32
32	"Corolla pale mauve, pinkish or white, 9.5–13 mm long; longest adaxial sepal 2.5–5.1 mm long; articles 1.9–2.3 mm long, with a central depression that has a regularly cracked pattern, the whole ‘cushion’ is surrounded by a raised rim; perennial (thinly woody at base and with a thin rhizome). Wet boggy sand in seasonal swamps and in grasslands"	"Lechenaultia peregrina"
32	"Corolla usually rich dark blue-purple with thin bright yellow stripes on palate, 13.5–25 mm long (dry); longest adaxial sepal up to 8.5 mm long; article ‘cushions’ not depressed nor cracked, 2.9–3.3 mm long; annual or perennial. Usually in non-waterlogged habitats"	"Lechenaultia filiformis"
33	"Corolla 9–14 mm long when dry, rich mauve on lobes with a broad yellow throat, a white line separating the colours; articles grey, 0.7–1.3 mm long, a short-oblong plate with an oblong ‘cushion’ (lifting at each end) on each ‘face’, food bodies absent"	"Lechenaultia sp. Liverpool River (K.G. Brennan 7959)"
33	"Corolla 5.5–8 (–10) mm long when dry, white, pale mauve or pale mauve with yellow palate; articles reddish brown, 1.0–1.4 mm long, oblong-elliptic with rounded corners, main plane a raised pale rim, each ‘face’ with two raised areas joined by a rib, with pale food bodies in pockets on one side"	"Lechenaultia ovata"