1	"Stipules absent; flowering stems mainly with only scale-like stellate hairs or a mix of scale-like and scattered multiangulate stellate hairs"	2
1	"Stipules present, leaf-like and conspicuous or minute and inconspicuous; flowering stems with only multiangulate stellate hairs"	8
2	"Leaves narrowly ovate to oblong-linear, usually >15 mm long"	3
2	"Leaves ovate, oblong to orbicular, < 15 mm long"	4
3	"Calyx inner surface stellate hairy"	"Thomasia stelligera"
3	"Calyx inner surface glabrous"	"Thomasia sp. Green Hill (S. Paust 1322)"
4	"Style 5-winged; petals absent; ovary with peltate scale-like stellate hairs over glandular hairs"	"Thomasia pygmaea"
4	"Style filiform; petals present; ovary with peltate scale-like stellate hairs or flat stellate hairs"	5
5	"Ovary with 4–5 locules; petals with dense marginal peltate scale-like stellate hairs or multiangulate stellate hairs; calyx > 8 mm long; peduncles < 6 mm long"	"Thomasia gardneri"
5	"Ovary with 3 locules; petals glabrous or occasional scale-like stellate hairs on abaxial surface; calyx < 8 mm long; peduncles > 7 mm long"	6
6	"Leaves < 7 mm long, lower leaf surface with peltate scale-like stellate hairs; peduncles 10–23(–30) mm long with 1–2(3) flowers"	"Thomasia microphylla"
6	"Leaves usually > 7 mm long, lower leaf surface with flat scale-like stellate hairs, sometimes with occasional multiangulate stellate hairs; peduncles (10–)30–50 mm long with 3–7 flowers"	7
7	"Calyx outer surface with flat scale-like stellate hairs alone, inner surface glabrous; leaves with midvein only indented"	"Thomasia sp. Green Hill (S. Paust 1322)"
7	"Calyx outer surface with flat scale-like and scattered multiangulate stellate hairs, inner surface with scattered white stellate hairs; leaves with midvein and minor veins indented"	"Thomasia julietiae"
8	"Stipules conspicuous; anthers poricidally dehiscent or with late lateral splitting; style c. 2 times longer than ovary and not well exserted from the calyx"	9
8	"Stipules minute and inconspicuous; anthers showing early lateral dehiscence; style > 3 times longer than ovary and well exserted from the calyx"	37
9	"Leaves and stipules linear, with margins tightly revolute"	10
9	"Leaves and stipules not linear, margins flat or scarcely recurved to recurved"	11
10	"Inflorescence with 2 flowers (rarely 3); calyx < 4.5 mm long; ovules 2 per locule"	"Thomasia sp. Hopetoun (K.R. Newbey 4896)"
10	"Inflorescence with 3–6 flowers; calyx usually > 4.5 mm long; ovules 6–8 per locule"	"Thomasia sarotes"
11	"Mature leaves lobed"	12
11	"Mature leaves entire to scarcely sinuate, not distinctly lobed"	18
12	"Mature leaves divided almost to midvein, appearing ‘oak-like’"	13
12	"Mature leaves lobed or trilobed, not divided almost to the midvein"	14
13	"Leaves coriaceous, lower surface with a close tomentum of short stellate hairs each with arms to 0.2 mm long"	"Thomasia quercifolia"
13	"Leaves soft, lower surface with scattered to medium dense long stellate hairs each with arms to 0.8 mm long"	"Thomasia sp. Vasse (C. Wilkins & K. Shepherd CW 581)"
14	"Leaves discolorous, lower surface with a close tomentum of stellate hairs; calyx 13–20 mm long with a strongly dissected tube c. 20% of the total length"	"Thomasia discolor"
14	"Leaves almost concolorous, lower surface with scattered to dense stellate hairs; calyx 6–10 mm long with a moderately dissected tube c. 40% of the total length"	15
15	"Leaves (20)30–83 mm long, soft, lower surface with moderately dense stellate hairs"	16
15	"Leaves 12–44 mm long, coriaceous, lower surface glabrous or with scattered stellate hairs"	17
16	"Petals absent or minute c. 0.4 mm long; epicalyx bracts narrowly obovate or narrowly elliptic"	"Thomasia solanacea"
16	"Petals > 1 mm long; epicalyx bracts ovate"	"Thomasia brachystachys"
17	"Leaf margins strongly multi-lobed with a ±trilobed base, lamina usually longer than wide; anther filaments > 2.5 mm long"	"Thomasia triphylla"
17	"Leaf margins distinctly trilobed, lamina as long as wide; anther filaments < 2 mm long"	"Thomasia triloba"
18	"Stamens and staminodes united in a glabrous or hairy perigynous cup c. 2 mm long (often longer than the ovary)"	19
18	"Stamens free or scarcely united at base, or with a glabrous staminal tube < 0.8 mm long"	21
19	"Perigynous cup hairy"	"Thomasia macrocarpa"
19	"Perigynous cup glabrous"	20
20	"Petals with scattered to dense stellate hairs"	"Thomasia montana"
20	"Petals glabrous"	"Thomasia glabripetala"
21	"Calyx thickened along the central area either side of the midvein and with thin, undulating margins; leaves usually coriaceous with very few scattered stellate hairs"	"Thomasia grandiflora"
21	"Calyx thin except for midvein; leaves thin and soft, indumentum various"	22
22	"Leaves usually discolorous with a tomentose indumentum of dense stellate hairs below"	"Thomasia dielsii"
22	"Leaves almost concolorous with an indumentum of scattered to moderately dense stellate hairs below"	23
23	"Leaves < 10 mm long; pedicels with long glandular hairs"	"Thomasia tremandroides"
23	"Leaves > 10 mm long; pedicel with glandular hairs absent or inconspicuous"	24
24	"Ovary with ±sessile papillose glands sometimes mixed with stellate hairs, without stalked glandular hairs"	25
24	"Ovary with stellate hairs, sometimes with white, red- or pink-tipped stalked glandular hairs, or with stalked glandular hairs only"	29
25	"Petioles 0.2–1.5 mm long; leaf margins strongly recurved; upper surface of epicalyx bracts glabrous or rarely with 1–2 hairs"	"Thomasia rulingioides"
25	"Petioles (1.6–)2–8 mm long; leaf margins scarcely recurved; upper surface of epicalyx bracts with hairs throughout"	26
26	"Calyx usually < 6.5 mm long, ovules 2 per locule"	27
26	"Calyx usually > 6.5 mm long; ovules 4–8 per locule"	28
27	"Ovary with red papillose glands only; flowers (3–)5–6 per inflorescence"	"Thomasia purpurea"
27	"Ovary with red papillose glands and scattered to dense white stellate hairs at the apex; flowers (4)5–8(–12) per inflorescence"	"Thomasia multiflora"
28	"Calyx lobes broadly ovate, c. 6 mm wide, tube almost half of total length; ovary with papillose glands only"	"Thomasia macrocalyx"
28	"Calyx lobes ovate to narrowly ovate, c. 3.5 mm wide, tube < 20 % of total length; ovary with papillose glands only or a mix of papillose glands and white stellate hairs"	"Thomasia petalocalyx"
29	"Base of style prominently tomentose to 1/3 of length; leaf margin recurved but entire to scarcely crenulate"	30
29	"Base of style completely glabrous or with a few stellate hairs; leaf margin recurved and somewhat crisped"	33
30	"Ovary with short stellate hairs only"	31
30	"Ovary with short stellate hairs and conspicuous glandular hairs 0.5–0.6 mm long"	32
31	"Epicalyx bracts ovate, (1.7–)2–3 mm wide; flowers 1–2(3) per inflorescence; ovules (2–)4–7 per locule ; erect spreading shrub"	"Thomasia rhynchocarpa"
31	"Epicalyx bracts narrowly ovate, 0.8–1 mm wide; flowers (2)3(4) per inflorescence; ovules 2 per locule; low mounded shrub"	"Thomasia pauciflora"
32	"Inflorescence a monochasium of < 3–7(–9) flowers; calyx > 7 mm long; leaves usually narrowly ovate (L:W c. 6:1)"	"Thomasia paniculata"
32	"Inflorescence a dichasium or monochasium of 7–20 flowers; calyx < 7 mm long; leaves usually ovate (L:W c. 2.5:1)"	"Thomasia sp. Big Brook (M. Koch 2373)"
33	"Leaves ovate, 8–27 mm wide"	34
33	"Leaves narrowly ovate, elliptic or oblong, 1.2–8 mm wide"	35
34	"Leaf upper surface prominently rugose; epicalyx bracts 2.1–3.3 mm wide; petals absent"	"Thomasia rugosa"
34	"Leaf upper surface not prominently rugose; epicalyx bracts 0.8–1.2 mm wide; petals stellate hairy"	"Thomasia tenuivestita"
35	"Petals with stellate hairs on the margin; anthers < 1.5 mm long; ovary hairs 0.7–1.25 mm long; peduncle stellate hairs with arms to 1.3 mm long"	"Thomasia cognata"
35	"Petals glabrous; anthers > 1.7 mm long; ovary hairs 0.15–0.3 mm long; peduncle stellate hairs with arms 0.2–0.4 mm long"	36
36	"Leaves with veins scarcely impressed; inflorescence < 60 mm long; epicalyx bracts c. 1.5 mm wide; flowers 5-merous; anthers 1.8–1.9 mm long; ovules 2 per locule"	"Thomasia angustifolia"
36	"Leaves with veins strongly impressed; inflorescence > 60 mm long; epicalyx bracts 2.1–4 mm wide; flowers 5- or 6-merous; anthers c. 3 mm long; ovules 6–8 per locule"	"Thomasia formosa"
37	"Leaf lower surface and calyx outer surface with a dense indumentum of small stellate hairs, each with c. 12 arms (c. 0.2 mm long) arms, beneath moderately dense large stellate hairs (c. 0.5 mm long); moderately dense red-tipped glandular hairs on new growth and outer calyx of flowers in bud"	"Thomasia sp. Lesueur (M. Hislop 4217)"
37	"Leaf lower surface and base of calyx outer surface with an indumentum of very few small stellate hairs, each with c. 6 arms (0.2 mm long), beneath moderately dense large stellate hairs (0.5 mm long); scattered red-tipped glandular hairs on new growth and outer calyx of flowers in bud"	"Thomasia foliosa"