1	"Specimens with flowers only"	2
1	"Specimens with leaves and flowers"	24
2	"Flowers red, orange-red or pink (in one sp. pale green and tinged with pink); perianth induplicate-valvate in bud; floral nectaries present or absent"	3
2	"Flowers white, cream, pale green or green, usually blotched or stippled with red inside; perianth valvate in bud; floral nectaries absent"	18
3	"Flowers without nectaries inside near base of tube; perianth obconical-campanulate, glabrous or sparsely glandular-puberulent inside, rarely with stellate hairs"	4
3	"Flowers with nectaries inside near base of tube; perianth campanulate or tubular-campanulate, with stellate tomentum both inside and outside, occasionally glabrous inside"	6
4	"Inflorescences glabrous; flowers bright red; perianth glabrous or with scattered stellate hairs outside"	"Brachychiton acerifolius"
4	"Inflorescences puberulent; flowers dark red or pink; perianth pubescent outside"	5
5	"Flowers dark red, 34-40 mm long"	"Brachychiton x vinicolor"
5	"Flowers pink, 20-30 mm long"	"Brachychiton x incarnatus"
6	"Floral-tube glabrous or sparsely glandular-puberulent inside; androgynophores: male flowers - glabrous above middle"	7
6	"Floral-tube tomentose or pubescent inside"	8
7	"Tube glabrous inside; flowers (25-) 35-45 mm long, (20-) 22-30 mm diameter; androgynophores: male flowers - (12-) 22-30 mm long, female flowers - 5-10 mm long. Shrub 1-4 m tall"	"Brachychiton bidwillii"
7	"Tube sparsely glandular-puberulent inside; flowers 20-30mm long, 16-26mm diameter; androgynophores: male flowers - 9-12 mm long, female flowers - 1.5-2.5 mm long. Shrub or small tree 1-4 m tall"	"Brachychiton vitifolius"
8	"Nectaries vertically decurrent and rib-like, 10 (-16), 2 opposite each perianth lobe"	9
8	"Nectaries lingulate, hooded or annular and irregularly lobed"	10
9	"Perianth devoid of papillae outside; flowers 30-45 mm long, 30-40mm diameter; androgynophores; male flowers - 14-26 mm long, female flowers - 6-8 mm long"	"Brachychiton velutinosus"
9	"Perianth papillose outside, papillae 0.2-1.5 mm long, surmounted by brown stellate hairs 0.5-0.75 mm diameter; androgynophores: male flowers - 13-18 mm long, female flowers - 4.5-6 mm long"	"Brachychiton discolor"
10	"Flowers dull red, pale green or grey-green at base; perianth tubular-campanulate, white stellate-puberulent outside (hairs 0.1-0.25(-0.4) mm diameter)"	11
10	"Flowers orange-red, red or pink; perianth campanulate, brown stellate-hirtellous outside (hairs 0.15-1.6 mm diameter)"	12
11	"lnflorescences (5-) 10-20 (-25)-flowered"	"Brachychiton albidus"
11	"Inflorescences 2-7 (-9)-flowered"	"Brachychiton garrawayae"
12	"Nectaries 10, 2 opposite each perianth lobe"	13
12	"Nectaries irregularly lobed or 2-4 opposite each perianth lobe"	14
13	"Branchlets glabrous; flowers 35-55 mm long, 50-60 mm diameter"	"Brachychiton grandiflorus"
13	"Branchlets stellate-hirtellous; flowers 25-45 mm long, 20-45 mm diameter"	"Brachychiton bidwillii"
14	"Branchlets stellate-puberulent (hairs 0.1-0.35 mm diameter)"	15
14	"Branchlets stellate-tomentose (hairs 0.3-3.5 mm diameter)"	16
15	"lnflorescences 1-12-flowered"	"Brachychiton x carneus"
15	"Inflorescences 8-30-flowered"	"Brachychiton x allochrous"
16	"Bracts 4-9 mm long"	"Brachychiton chillagoensis"
16	"Bracts 2.5-4 mm long"	17
17	"lnflorescences 2-10-flowered; branchlets tomentose (hairs 0.4-1.3 mm diameter)"	"Brachychiton paradoxus"
17	"Inflorescences 10-24-flowered; branchlets puberulent"	"Brachychiton muellerianus"
18	"Flowers blotched or stippled with red inside; perianth campanulate or compressed-campanulate; styles twisted, 1-3 mm long; stigmas connate at base, ovate to lanceolate"	19
18	"Flowers white or cream, not blotched with red inside; perianth tubular-campanulate; styles not twisted; stigmas connate into a shallowly 5-lobed capitate structure"	23
19	"Flowers pale green or green; perianth campanulate, 5-lobed to c. middle or above, lobes glabrous or sparsely glandular-puberulent inside; androgynophores: male flowers - cylindrical, flanged at base, glabrous above, glandular-puberulent or simple-hispid at base, female flowers – depressed-obovoid, glandular-puberulent or simple-hirtellous"	20
19	"Flowers cream or white, rarely pale green; perianth compressed-campanulate, rarely campanulate, 5 (-6) lobed to below middle, lobes stellate-tomentose inside; androgynophores: male flowers - bulbous, villous above middle, female flowers - compressed-cylindrical, villous above"	21
20	"Perianth stellate-pubescent outside"	"Brachychiton diversifolius"
20	"Perianth glabrous or sparsely pubescent outside"	"Brachychiton populneus"
21	"Inflorescences compact, 30-80-flowered, 1-2 (-2.5) cm long"	"Brachychiton compactus"
21	"Inflorescences open or condensed, but not compact, 10-30 (-60)-flowered, (2-) 3-6 (-9) cm long"	22
22	"Perianth lobed to well below middle, lobes tomentose inside"	"Brachychiton rupestris"
22	"Perianth lobed to c. middle, lobes pubescent inside (hairs mid-dense to sparse)"	"Brachychiton x turgidulus"
23	"Flowers 15-20 (-22) mm long, 18-30 mm diameter; perianth lobes tomentose at top inside, glabrous below; androgynophores: male flowers - hirsute about middle, 7-12 mm long, female flowers - hirsute above middle, 4-6 mm long; ovaries tomentose"	"Brachychiton australis"
23	"Flowers 10-16 mm long, 11-18 mm diameter; perianth lobes and top of floral-tube tomentose inside; androgynophores: glandular-puberulent, male flowers - 3-6 mm long, female flowers - 0.5-1.2 mm long; ovaries glandular-puberulent at base, glabrous elsewhere"	"Brachychiton collinus"
24	"Floral nectaries present inside near base of perianth tube; perianth induplicate-valvate in bud with induplicate margins greater than 2 mm wide, orange-red, red or pink, rarely pale green and tinged with pink, 20-60 mm long. Leaves usually with tomentum, rarely glabrous"	25
24	"Floral nectaries absent from inside of perianth tube; perianth valvate in bud, or slightly induplicate-valvate with induplicate margins to 2 mm wide, pale green, white, cream or red, 6-20 mm long. Leaves glabrous, rarely with tomentum"	38
25	"Leaves glabrous"	"Brachychiton grandiflorus"
25	"Leaves with a distinct abaxial and/or adaxial tomentum"	26
26	"Leaf blades entire"	"Brachychiton paradoxus"
26	"Leaf blades 3-5 (-7)-lobed"	27
27	"Nectaries vertically decurrent and rib-like, 2 opposite each perianth lobe"	28
27	"Nectaries lingulate, hooded, or annular and irregularly lobed"	29
28	"Leaf blades shallowly 3 (-5)-lobed, broadly ovate to broadly depressed ovate; flowers 30-45 mm long, 30-40 mm diameter; perianth devoid of papillae outside; Papua New Guinea & Cape York"	"Brachychiton velutinosus"
28	"Leaf blades 5 (-7)-lobed to c. middle, lobes shallowly triangular to broadly deltate; perianth papillose outside, papillae 0.2-1.5 mm long, surmounted by brown hairs; Central coastal  to NE. N.S.W"	"Brachychiton discolor"
29	"Leaf blades 3-5 (-7)-lobed to about middle or below"	30
29	"Leaf blades shallowly 3-5-lobed"	33
30	"Leaf blades white velutinous or canescent below (stellate hairs 0.15-0.4 (-0.5) mm diameter)"	31
30	"Leaf blades hirtellous-velutinous below (stellate hairs 0.5-1.3 mm diameter)"	32
31	"Leaf blades sparsely puberulent above; inflorescences (5-) 10-20 (-25)-flowered; pericarp 1.5-3 mm thick; stipes 4-9 mm diameter"	"Brachychiton albidus"
31	"Leaf blades sub-velutinous above; inflorescences 2-7 (-9)-flowered; pericarp 1-1.5mm thick; stipes 2-4 mm diameter"	"Brachychiton garrawayae"
32	"Inflorescences condensed panicles, 6-60-flowered, not compact; follicles hirtellous outside; male androgynophores glabrous above middle"	"Brachychiton bidwillii"
32	"Inflorescences compact, (5-) 10-20-flowered, 3-4 cm long; follicles sparsely hirtellous or glabrous outside; male androgynophores stellate-tomentose"	"Brachychiton chillagoensis"
33	"Leaf blades with all veins distinctly impressed above"	"Brachychiton vitifolius"
33	"Leaf blades with veins flush or slightly impressed above"	34
34	"Floral-tube glabrous inside; nectaries distinct, 10, two opposite each perianth lobe, lingulate, ovate; stamens and stigmas protruding or flush with top of tube"	"Brachychiton bidwillii"
34	"Floral tube tomentose inside; nectaries annular, 5 and deeply 3-lobed or 15-20; stamens and stigmas below top of tube"	35
35	"Leaf blades glabrous above"	36
35	"Leaf blades with a distinct tomentum above"	37
36	"Abaxial tomentum of stellate hairs"	"Brachychiton x carneus"
36	"Abaxial tomentum of simple and stellate hairs"	"Brachychiton x allochrous"
37	"Leaf blades 7-13 cm long, 7.5-14 (-16) cm wide; flowers dull red, (18-) 22-30 mm long, 15-25 mm diameter; follicles 3.5-5.5 cm long, on stipes 2-4 mm diameter; seeds 12-23 per follicle"	"Brachychiton garrawayae"
37	"Leaf blades (10-) 13-22 cm long, (10.5-) 14-22 cm wide; flowers orange-red; follicles 6.5-9 cm long, on stipes 4.5-9 mm diameter; seeds 28-42 per follicle"	"Brachychiton muellerianus"
38	"Perianth valvate in bud, white, cream, or green; innermost filaments of stamens and staminodes all with anthers"	39
38	"Perianth slightly induplicate-valvate in bud, bright red; innermost filaments of stamens and staminodes without anthers"	46
39	"Leaves entire or 2-3-lobed, rarely 5-lobed; flowers blotched or stippled with red inside; perianth campanulate; styles twisted, 1-3 mm long; stigmas connate at base, ovate to lanceolate"	40
39	"Leaves 5-7(-9)-lobed; flowers white or cream; perianth tubular-campanulate; styles not twisted, glabrous, 0.6-1.5 mm long; stigmas connate into a shallowly 5-lobed capitate structure"	45
40	"Flowers pale green or green; perianth campanulate, 5-lobed to c. middle or above, lobes glabrous or sparsely glandular-puberulent inside; androgynophores: male flowers - cylindrical, flanged at base, glabrous above, glandular-puberulent or simple-hispid at base, female flowers - depressed-obovoid or obpatelliform, glandular-puberulent or simple-hirtellous; trunks cylindrical"	41
40	"Flowers white or cream; perianth compressed-campanulate, 5 (-6)-lobed to well below middle, lobes stellate-tomentose inside; androgynophores: male flowers - obclavate or bulbous, villous about middle, female flowers - compressed-cylindrical, villous above; trunks distinctly bulbous"	43
41	"Leaves 3 (5-)-lobed to about middle or well below"	"Brachychiton populneus subsp. trilobus"
41	"Leaves entire or shallowly 3-lobed"	42
42	"Perianth densely pubescent outside; androgynophores: male flowers - simple hispid at base, female flowers - hirtellous; stamens and staminodes 10; follicles 6-10 cm long, on stipes (2-) 4-10 mm long; exotestas and inside of pericarp simple-hirsute. Trop. Australia"	"Brachychiton diversifolius"
42	"Perianth sparsely pubescent or glabrous outside; androgyophores glandular-puberulent or glabrous; stamens and staminodes 18-20; exotestas and inside of pericarp stellate-hirsute. NE Vic., N.S.W. & Qld"	"Brachychiton populneus subsp. populneus"
43	"Inflorescences compact, 30-80-flowered, 1-2 (-2.5) cm long; perianth lobes tomentose inside; leaves ovate to ovate-lanceolate, 6-12 cm long, 2.5-5.5 cm wide"	"Brachychiton compactus"
43	"Inflorescences open or condensed, but not compact, 10-30 (-60)-flowered, (2-) 3-6 (-9) cm long"	44
44	"Perianth lobed to well below middle, lobes tomentose inside; leaves linear-lanceolate to lanceolate, (4-) 5-11 cm long, 0.8-2 cm wide; trunk distinctly bulbous"	"Brachychiton rupestris"
44	"Perianth lobed to about middle, lobes pubescent inside (hairs mid-dense to sparse); leaves ovate to lanceolate, 7-12 cm long, 2-4 (-4.5) cm wide; trunk bulbous-tapering"	"Brachychiton x turgidulus"
45	"Flowers 10-16 mm long, 11-18 mm diameter; perianth lobes and top of floral tube tomentose inside; androgynophores glandular-puberulent: male flowers - 3-6 mm long, female flowers - 0.5-1.2 mm long; ovaries glandular-puberulent at base, glabrous elsewhere"	"Brachychiton collinus"
45	"Flowers 15-20 (-22) mm long, 18-30 mm diameter; perianth lobes tomentose at apex inside, glabrous below; androgynophores: male flowers - hirsute about middle, 7-12 mm long, female flowers - hirsute above middle, glandular-puberulent below, 4-6 mm long; ovaries tomentose"	"Brachychiton australis"
46	"Leaves stellate-canescent or hirtellous-velutinous below; flowers glandular-villous or stellate-pubescent inside"	"Brachychiton x incarnatus"
46	"Leaves glabrous or with scattered stellate hairs along primary veins below; flowers glabrous or stellate-pubescent inside"	47
47	"Flowers stellate-pubescent inside and outside (hairs mid-dense). Leaf blades 5-lobed to about middle; lobes semi-elliptic acuminate, ovate-acuminate or triangular. Inflorescences condensed panicles, 25-60-flowered, stellate-puberulent, 9-12 cm long"	"Brachychiton x vinicolor"
47	"Flowers glabrous or with scattered stellate hairs outside, sparsely glandular-puberulent inside. Leaf blades entire or 3-5-lobed; lobes rounded or semi-elliptic, rarely acute. Inflorescences open panicles, 100-200-flowered, glabrous"	"Brachychiton acerifolius"