1	"Leaves pinnately cut into numerous linear segments; corolla scarlet, salver-shaped (NSW, NT, Qld, WA)"	"Ipomoea quamoclit"
1	"Leaves not as above, or if so, then corolla not scarlet and salver-shaped"	2
2	"Outer sepals with awn ³2 mm long, at or below the apex; corolla salver-shaped"	3
2	"Outer sepals without a long awn; corolla funnel-shaped or campanulate, rarely salver-shaped"	4
3	"Corolla small, scarlet, <5 cm long, limb <3 cm across (NSW, NT, Qld, WA)"	"Ipomoea hederifolia"
3	"Corolla large, white, >5 cm long, limb >6 cm across (NSW, Qld)"	"Ipomoea alba"
4	"Corolla small, £1.5 cm long, rarely longer; sepals fimbriate; peduncles <2 cm long or absent"	5
4	"Corolla >1.5 cm long or if less, then sepals not fimbriate; peduncles usually > 2mm long"	9
5	"Herbs with erect or decumbent stems; corolla pink to purple, never white, mid-petaline bands glabrous (NSW, NT, Qld, SA, WA)"	"Ipomoea polymorpha"
5	"Annual or herbaceous perennial vines with stems twining, climbing or trailing; corolla pink, purple or white, mid-petaline bands hairy"	6
6	"Ovary and capsule hairy; corolla pink to purple (NT, Qld, WA)"	"Ipomoea eriocarpa"
6	"Ovary and capsule glabrous; corolla white"	7
7	"Leaf base attenuate, rounded to truncate, never cordate (NSW, NT, Qld, SA, WA)"	"Ipomoea lonchophylla"
7	"Leaf base cordate"	8
8	"Leaves glabrous or very sparsely hairy on upper surface, moderately pilose on lower surface (arid NT, Qld, SA, WA)"	"Ipomoea racemigera"
8	"Leaves evenly pilose on both surfaces (NSW, NT, Qld, WA)"	"Ipomoea plebeia"
9	"Ovary and capsule 3-locular"	10
9	"Ovary and capsule 2 or 4-locular"	15
10	"Leaves digitate with 3–5 lobes, lobes coarsely and irregularly toothed to pinnatifid"	11
10	"Leaves entire or 3–5 lobed, not digitate, lobes entire"	12
11	"Corolla <1.5 cm long; sepals 2.8–5 mm long in flower (NT, Qld, WA)"	"Ipomoea coptica"
11	"Corolla >4 cm long; sepals 6–14 mm long in flower (NT, Qld)"	"Ipomoea diversifolia"
12	"Sepals £15 mm long, apex acute (NSW, NT, Qld)"	"Ipomoea purpurea"
12	"Sepals mostly >15 mm long with apex long attenuate to acuminate"	13
13	"Sepals with ±appressed hairs <1 mm long; corolla limb >5 cm diameter; flowers in cymose clusters on long peduncles (NSW, Qld, SA, Vic, WA)"	"Ipomoea indica"
13	"Sepals with ascending to spreading hairs >1 mm long; corolla limb <5 cm diameter; flowers usually solitary or in 3’s"	14
14	"Sepals abruptly narrowed with the long subacute tips strongly spreading or curved, hairs spreading, 3–4 mm long (Qld)"	"Ipomoea hederacea"
14	"Sepals gradually narrowed with the long acute tips suberect, straight, scarcely spreading, hairs ascending to spreading < 3 mm long (NT, Qld, WA)"	"Ipomoea nil"
15	"Leaves palmately divided to the base or almost so"	16
15	"Leaves entire or bearing only basal lobes, or if palmately lobed, then lobes cut less than two thirds of distance to base of blade"	17
16	"Leaves and stems patently hairy (coastal NT, WA)"	"Ipomoea pes-tigridis"
16	"Leaves and stems glabrous (NSW, Qld, SA, WA)"	"Ipomoea cairica"
17	"Leaves narrow-linear, occasionally distinctly hastate, with a length:width ratio of 6–45; corolla white or lilac to mauve"	18
17	"Leaves not linear, with a length:width ratio <5, if narrow-linear and hastate then corolla pink to purple"	19
18	"Leaves entire; outer sepals much shorter than inner, surface smooth; corolla salver-shaped (NT, Qld, WA)"	"Ipomoea graminea"
18	"Leaves barely to distinctly hastate; sepals equal in length, longitudinal veins rugose; corolla funnel-shaped (NT, WA)"	"Ipomoea tolmerana"
19	"Corolla salver-shaped, white, rarely pale pink, ³8 cm long; sepals mainly >20 mm long in fruit"	20
19	"Corolla funnel-shaped to campanulate, pink or purple, rarely white or yellow, mainly <8 cm long; sepals mainly <20 mm long in fruit"	23
20	"Stamens inserted near mouth of corolla tube (Qld)"	"Ipomoea aculeata"
20	"Stamens inserted near the base of the corolla tube"	21
21	"Leaves, sepals and mid-petaline bands of corolla hairy (Qld)"	"Ipomoea saintronanensis"
21	"Leaves, sepals and mid-petaline bands of corolla glabrous"	22
22	"Leaves mostly 3–5 lobed; stamens exserted; outer sepals much shorter than inner sepals (WA)"	"Ipomoea trichosperma"
22	"Leaves mostly entire; stamens included; outer sepals equal or slightly shorter than inner sepals (NT, Qld, WA)"	"Ipomoea violacea"
23	"Marsh or aquatic plants; stems thick, hollow, rooting at nodes; capsules indehiscent or dehiscing irregularly"	24
23	"Rarely in marshy situations; stems herbaceous or woody; capsules valvate-dehiscent"	25
24	"Corolla creamy-white, 1.5–2.5 cm long (NSW, NT, Qld, SA, WA)"	"Ipomoea diamantinensis"
24	"Corolla pink or pale lilac, often with a purple centre, rarely white, 3–6 cm long (NT, Qld, WA)"	"Ipomoea aquatica"
25	"Leaves strongly emarginate to bilobed; stems trailing, rooting at the nodes; plants fleshy; growing on coastal dunes"	26
25	"Leaves not strongly emarginate to bilobed"	27
26	"Corolla pink or purple; peduncles 3–16 cm long (NSW, NT, Qld, WA)"	"Ipomoea pes-caprae"
26	"Corolla white or yellowish with a purple centre; peduncles <2 cm long (NT, Qld)"	"Ipomoea imperati"
27	"Sepals distinctly fimbriate; ovary usually hairy"	28
27	"Sepals glabrous, occasionally hairy, not distinctly fimbriate; ovary mainly glabrous"	29
28	"Corolla 3–4 cm long (Qld, WA, also cultivated)"	"Ipomoea batatas"
28	"Corolla 1.5–2 cm long (NT, Qld, WA)"	"Ipomoea triloba"
29	"Leaves palmatifid with 5–7 lobes (Qld)"	"Ipomoea mauritiana"
29	"Leaves entire or bearing only basal lobes"	30
30	"Corolla yellow, if whitish then corolla £5 cm long with a dark purple centre"	31
30	"Corolla pink or purple, rarely whitish, if whitish then corolla >5 cm long"	34
31	"Leaves fleshy, leaves ovate to oblong, apex obtuse to emarginated; outer sepals >8 mm long (NT, Qld)"	"Ipomoea imperati"
31	"Leaves herbaceous, ovate to broadly ovate, acuminate, acute; outer sepals 3–6 mm long"	32
32	"Corolla £1.5 cm long, yellow; sepals with some stout hairs 0.5–1.5 mm long, rarely glabrous (Qld)"	"Ipomoea brownii"
32	"Corolla ³2 cm long, rarely less, yellow to whitish, with a dark purple centre; sepals glabrous or sparsely pubescent with hairs <0.5 mm long"	33
33	"Corolla 2–2.5 cm long, pale yellow to whitish (Qld)"	"Ipomoea obscura"
33	"Corolla 2.7–5.5 cm long, yellow (Qld)"	"Ipomoea ochracea"
34	"Leaves glabrous or sparsely hairy"	35
34	"Leaves moderately to densely hairy"	49
35	"Sepals ovate, length:width ratio >2, apex acute to narrowly obtuse"	36
35	"Sepals broadly ovate to orbicular, length:width ratio <2, apex broadly obtuse to rounded"	45
36	"Seeds puberulent usually with a tuft of hairs around the hilum"	37
36	"Seeds with longer hairs on the margins, sometimes glabrous"	43
37	"Peduncle equal or shorter than the pedicels, mainly ≤1.5 cm long"	38
37	"Peduncle longer than the pedicels, mainly >1.5 cm long"	39
38	"Leaves strongly hastate with narrow-linear terminal lobe and recurved linear to linear-triangular basal lobes; stems fibrous, becoming woody (Qld)"	"Ipomoea funicularis"
38	"Leaves ovate to broad-ovate or ovate-oblong, sagittate to deeply cordate, rarely hastate at base; stems herbaceous (NT, Qld, WA)"	"Ipomoea gracilis"
39	"Corolla sky blue with a paler throat; sepals <7 mm long; seeds lacking tuft of hairs around hilum (Qld)"	"Ipomoea tricolor"
39	"Corolla pink to purple, occasionally white, usually with a darker centre; sepals >7 mm long; seeds with a tuft of long hairs around the hilum"	40
40	"Outer sepals with a ±smooth surface, if veins raised then ±smooth (WA)"	"Ipomoea kalumburu"
40	"Outer sepals bearing 3–5 raised, tuberculate, longitudinal veins"	41
41	"Leaves broad-ovate to ±reniform, cordate at the base (NT, Qld, WA)"	"Ipomoea argillicola"
41	"Leaves narrow-ovate to oblong-lanceolate, hastate to sagittate at the base"	42
42	"Stems, petioles and sepals at flowering with scattered stout hairs (NT, WA)"	"Ipomoea versipellis"
42	"Stems, petioles and sepals at flowering glabrous or rarely with occasional weak, not stout hairs and never on sepals (NT, Qld, WA)"	"Ipomoea limosa"
43	"Seeds glabrous or with hairs on the margins (Qld)"	"Ipomoea tiliacea"
43	"Seeds villous"	44
44	"Corolla £4 cm long; sepals at flowering <11 mm long; leaves entire (NT, Qld, SA, WA)"	"Ipomoea muelleri"
44	"Corolla >4 cm long; sepals at flowering >11 mm long; leaves usually with two rounded hastate lobes (NT, Qld)"	"Ipomoea brassii"
45	"Peduncles >3 cm long, at least 3 times as long as pedicel"	46
45	"Peduncles mainly <3 cm long, never 3 times as long as pedicel"	47
46	"Erect shrubs; corolla with pubescent mid-petaline band (NT, Qld, SA, WA)"	"Ipomoea carnea"
46	"Liana; corolla glabrous (Qld)"	"Ipomoea tiliacea"
47	"Sepals equal to sub-equal, mainly <13 mm long at flowering (NT, Qld, WA)"	"Ipomoea abrupta"
47	"Inner sepals longer than outer, 12–22 mm long at flowering"	48
48	"Leaves broad-ovate, orbicular or reniform, base cordate (NT, Qld, WA)"	"Ipomoea costata"
48	"Leaves lanceolate, usually rounded-hastate or sagittate, occasionally deeply lobed at the base (Qld, WA)"	"Ipomoea calobra"
49	"Corolla with tomentose mid-petalline bands"	50
49	"Corolla glabrous"	51
50	"Shrub, stems not twining; sepals 8–11 mm long; bracts 2–3 mm long (WA)"	"Ipomoea yardiensis"
50	"Stems twining; sepals >15 mm long; bracts 10–15 mm long (NT, WA)"	"Ipomoea bracteolata"
51	"Sepals at flowering broadly ovate, oblong or orbicular, obtuse, outer surface smooth"	52
51	"Sepals at flowering ovate, acuminate to lanceolate, acute, surface with 5 raised, longitudinal veins"	53
52	"Sepals at flowering to 11 mm long, if longer then sepals sparsely hairy; leaves acute to narrowly obtuse (NT, Qld, WA)"	"Ipomoea abrupta"
52	"Sepals at flowering 8–10 mm long, moderately to densely hairy; leaves obtuse to rounded (Qld)"	"Ipomoea densivestita"
53	"Leaves not lobed at the base; sepals 18–21 mm long (NT, Qld)"	"Ipomoea antonschmidii"
53	"Leaves usually hastate to sagittate at the base; sepals £ 16 mm long (NT, WA)"	"Ipomoea versipellis"