1	"Leaves pinnately cut into numerous linear segments corolla scarlet, salviform (introduced)"	"Ipomoea quamoclit"
1	"Leaves not as above or if so then corolla not scarlet and salviform"	2
2	"Sepals with awn longer than 2 mm at or below the apex, corolla salver-shaped; corolla small, scarlet less than 5 cm long; limb less than 3 cm wide (introduced)"	"Ipomoea hederifolia"
2	"Sepals without a long awn; corolla funnel shaped or campanulate, rarely salver-shaped"	3
3	"Corolla small, less than 15 mm long, sepals ciliate, peduncles < 20 mm or absent"	4
3	"Corolla more than 15 mm long or if less then sepals not ciliate or fimbriate, or peduncle more than 20 mm long"	8
4	"Erect or decumbent herb; corolla pink, glabrous"	"Ipomoea polymorpha"
4	"Stems twining or prostrate; mid-petaline band of corolla hairy"	5
5	"Ovary and capsule hairy, corolla pink to purple"	"Ipomoea eriocarpa"
5	"Ovary and capsule glabrous, corolla white"	6
6	"Leaves attenuate to rounded at the base, never cordate"	"Ipomoea lonchophylla"
6	"Leaves cordate"	7
7	"Leaves glabrous or very sparsely hairy above, moderately pilose below"	"Ipomoea racemigera"
7	"Leaves equally pilose on both sides"	"Ipomoea plebeia"
8	"Ovary and capsule 3-celled"	9
8	"Ovary and capsule 2 or 4-celled"	12
9	"Leaves digitate with 3-5 lobes, lobes coarsely and irregularly toothed to pinnatifid"	10
9	"Leaves entire or 3-5 lobed, but not digitate, lobes entire"	11
10	"Corolla < 15 mm long; sepals 2.8-5 mm long in flower"	"Ipomoea coptica"
10	"Corolla > 40 mm long; sepals 6-14 mm long in flower"	"Ipomoea diversifolia"
11	"Sepals <15 mm long, apex acute (introduced)"	"Ipomoea purpurea"
11	"Sepals mostly > 15 mm long, apex long attenuate to acuminate"	"Ipomoea nil"
12	"Leaves palmately cut to the base or almost so (introduced)"	"Ipomoea pes-tigridis"
12	"Leaves entire or with only basal lobes, if palmately lobed then lobes cut less than two thirds of distance to base of blade"	13
13	"Leaves long and narrow-linear, occasionally hastate, L:B ratio 6-45:1; corolla white or lilac to mauve"	14
13	"Leaves not linear, L:B ratio <5:1; if linear, corolla pink to purple"	15
14	"Outer sepals much shorter than inner, surface smooth; leaves lacking basal lobes; corolla salver-shaped"	"Ipomoea graminea"
14	"Outer sepals equal to inner sepals, longitudinal veins rugose; leaves more or less hastate; corolla funnel-shaped"	"Ipomoea tolmerana subsp. tolmerana"
15	"Corolla salver-shaped, white, 8 cm or more long; sepals exceeding 20 mm in fruit (syn. Ipomoea macrantha)"	"Ipomoea violacea"
15	"Corolla funnel-shaped, pink or purple, rarely white or yellow, less than 8 cm long, sepals  mainly  < 20 mm long in fruit"	16
16	"Marsh or aquatic plants, stems thick, hollow, rooting at nodes; capsule indehiscent or dehiscing irregularly; leaves lanceolate with hastate or sagittate base"	17
16	"Rarely in marshy situations; stems herbaceous or woody; capsules valvate-dehiscent"	18
17	"Corolla white, 15-25 mm long"	"Ipomoea diamantinensis"
17	"Corolla pink or pale lilac, often with a purple centre), rarely white in cultivated form), 30-60 mm long"	"Ipomoea aquatica"
18	"Leaves strongly emarginate to bilobed, stems trailing, rooting at the nodes; plants fleshy, usually coastal"	19
18	"Leaves not strongly emarginate to bilobed"	20
19	"Corolla pink or purple; peduncles 3-16 cm long"	"Ipomoea pes-caprae"
19	"Corolla white or yellowish with a purple centre; peduncles less than 2 cm (syn. Ipomoea stolonifera)"	"Ipomoea imperati"
20	"Sepals distinctly fimbriate, rarely glabrous; ovary usually hairy"	21
20	"Sepals usually glabrous, not distinctly fimbriate; ovary glabrous"	22
21	"Corolla 3-4 cm long (cultivated)"	"Ipomoea batatas"
21	"Corolla 1.5-2 cm long (introduced)"	"Ipomoea triloba"
22	"Leaves digitately divided into 5 lobes"	"Ipomoea mauritiana"
22	"Leaves entire or bearing only basal lobes"	23
23	"Corolla yellow, if whitish, corolla 5 cm long or less with a dark purple centre  (syn. Ipomoea stolonifera)"	"Ipomoea imperati"
23	"Corolla pink or purple, rarely whitish and then corolla > 5 cm long"	24
24	"Leaves glabrous or sparsely hairy"	25
24	"Leaves pubescent or tomentose"	36
25	"Sepals ovate, L:B ratio >2:1, apex acute to narrowly obtuse"	26
25	"Sepals broadly ovate to orbicular, L:B ratio <2:1, apex broadly obtuse to rounded"	31
26	"Seeds puberulent, usually with a tuft of hairs around hilum"	27
26	"Seeds with longer hairs on margins, sometimes glabrous"	30
27	"Peduncle equal to or shorter than pedicles, mainly  15 mm long or less"	"Ipomoea gracilis"
27	"Peduncle longer than pedicles, mainly more than 15 mm long"	28
28	"Leaves broadly ovate to sub reniform, base cordate"	"Ipomoea argillicola"
28	"Leaves narrowly ovate to oblong-lanceolate, base hastate to sagittate"	29
29	"Stems, petioles and sepals with scattered stout hairs at flowering"	"Ipomoea versipellis"
29	"Stems and petioles glabrous or rarely with occasional weak hairs at flowering; sepals glabrous"	"Ipomoea limosa"
30	"Corolla 4 mm long or less; sepals  less than 11 mm long at flowering; leaves entire"	"Ipomoea muelleri"
30	"Corolla 4 mm long or more; sepals more than 11 mm long at flowering; leaves usually hastate"	"Ipomoea brassii"
31	"Plant herbaceous, stems trailing, often rooting at nodes"	"Ipomoea polpha"
31	"Plant a shrub or liana"	32
32	"Branchlets puberulous; peduncles usually exceeding pedicels; plant a shrub"	"Ipomoea carnea"
32	"Branchlets glabrous; peduncles shorter than pedicels; plant a twining vine"	33
33	"Sepals more or less equal in length rarely, exceeding 11 mm"	34
33	"Inner sepals longer than outer, 12-20 mm long"	35
34	"Fruiting calyx equaling and enclosing the capsule, 11-55 mm long, rugose; capsule with prominent style base (syn. Ipomoea velutina)"	"Ipomoea abrupta"
34	"Fruiting calyx not enclosing the capsule, not or barely wrinkled; capsule without prominent style base"	"Ipomoea dunlopii"
35	"Leaves broadly ovate, orbicular or reniform, base cordate"	"Ipomoea costata"
35	"Leaves lanceolate, usually hastate or sagittate, occasionally deeply lobed at base (Qld, WA)"	"Ipomoea calobra"
36	"Corolla with tomentose mid-petalline band"	"Ipomoea bracteolata"
36	"Corolla glabrous"	37
37	"Sepals at flowering broadly ovate, oblong or orbicular, obtuse smooth (syn. Ipomoea velutina)"	"Ipomoea abrupta"
37	"Sepals at flowering ovate, acuminate to lanceolate, acute with 5 raised longitudinal veins"	38
38	"Leaves usually hastate to saggitate; sepals 16 mm long or less"	"Ipomoea versipellis"
38	"Leaves lacking lobes at base; sepals 18-21 mm long"	"Ipomoea antonschmidii"