1	"Plants ephemeral, 1–30 cm high; leaves fewer than 10"	2
1	"Plants perennial, 5–150 cm high; leaves more than 10"	6
2	"Calyx-tube globular, shorter than the lobes; calyx-lobes free; stigma strap- or fan-shaped with an apical brush or hairs; corolla-lobes folded at night or in dull weather"	3
2	"Calyx-tube linear, longer than the lobes; 2 calyx-lobes united almost to their tips; stigma cushion-like, hairy all over; corolla-lobes remaining spread until senescence"	5
3	"Corolla less than 5 mm across, white; stigma fan-shaped and brush-tipped"	"Stylidium perpusillum"
3	"Corolla 6–15 mm across, white or pink; stigma strap-like and fringed, projecting beyond the anthers"	4
4	"Nectary spur of corolla as long or longer than subtending calyx-lobe"	"Stylidium androsaceum"
4	"Nectary spur of corolla absent or shorter than subtending calyx-lobe"	"Stylidium ecorne"
5	"Corolla 3–4 mm across, never fan-shaped, the lobes oriented in opposing pairs, white or pale pink without external stripes; throat appendages fewer than 6"	"Stylidium despectum"
5	"Corolla 1.5–3.0 mm across, c. fan-shaped, pale pink with a deep rose stripe along outer side of each lobe, posterior lobes twice as long as anterior lobes; throat appendages 6"	"Stylidium beaugleholei"
6	"Leaves not rosetted, crowded along the branches; far East Gippsland only"	"Stylidium laricifolium"
6	"Leaves in basal rosettes or tufts"	7
7	"Leaves narrowly oblanceolate, incurved and closely packed, forming a basin, each often tipped by a long hair; flowers in a loose corymb or corymbose panicle; throat appendages absent; Grampians only"	"Stylidium soboliferum"
7	"Leaves linear-lanceolate, never incurved, hair at leaf-tip absent; flowers in erect racemes; throat appendages 6–8"	8
8	"Leaf width less than 3 mm, more or less linear"	9
8	"Leaf width at least 3 mm or, if  less than 3 mm, then leaf narrowly oblanceolate to oblanceolate"	10
9	"Flowers white to pale pink; plants generally not or only weakly rhizomatous; mainly sandy or clay soils from near sea-level to c. 500 m a.s.l."	"Stylidium graminifolium"
9	"Flowers deep pink to magenta; plants typically strongly rhizomatous and forming compact clumps; restricted to peaty soils of montane to sub-alpine areas"	"Stylidium montanum"
10	"Longest leaf (2–)5–40 cm, if longest leaf not greater than 11 cm then pilose; plants solitary or rhizomatous with 2–5 tufts; widespread from the coast to the subalps"	"Stylidium armeria"
10	"Longest leaf 2–12 cm, glabrous; plants typically strongly rhizomatous and forming compact clumps of up to c. 50 tufts; restricted to moist, peaty soils of sub-alpine and alpine areas"	"Stylidium montanum"