1	"Stems hairy for at least a few internodes below each inflorescence; leaves hairy or glabrous"	2
1	"Stems glabrous or rarely with a few hairs on peduncle but not on internodes below; leaves glabrous"	15
2	"Style-portion of floral tube sparsely to moderately hairy inside for at least a short portion of its length"	3
2	"Floral tube glabrous inside"	6
3	"Leaves alternate or opposite; stamens much shorter than sepals, often subsessile; anthers flat, locules opening towards centre of flower"	4
3	"Leaves opposite; stamens shorter or longer than sepals; anthers not flat but sometimes shallowly triangular in transverse section, locules not (or rarely almost) opening towards centre of flower"	5
4	"Leaves 3–18 mm long, hairy on upper surface (at least when young); involucral bracts 6–12, hairy on both surfaces; flowers 25 or more per head"	"Pimelea octophylla"
4	"Leaves less than 8 mm long, glabrous on upper surface; involucral bracts 3–6, glabrous inside; flowers 3–18 per head"	"Pimelea phylicoides"
5	"Repeatedly branched shrub to 2.5 m high; involucral bracts 2 or 4, elliptic to broadly elliptic, glabrous inside, shortly petiolate"	"Pimelea flava"
5	"Little branched shrub to 0.5 m high; involucral bracts 4 or rarely 6, more or less ovate, hairy inside, sessile"	"Pimelea humilis"
6	"Inflorescence of 1 or 2 terminal flowers; prostrate plant of alps and subalps"	"Pimelea biflora"
6	"Inflorescence terminal with more than 2 flowers or axillary"	7
7	"Fruit succulent, naked at maturity; Wilsons Promontory"	"Pimelea drupacea"
7	"Fruit dry, enclosed in persistent base of floral tube"	8
8	"Flower heads axillary; involucral bracts papery, petiolate, subtended by minute sessile bracts; widespread shrub of mountains and foothills"	"Pimelea axiflora"
8	"Flower heads terminal or less commonly axillary; involucral bracts (if present) not subtended by minute sessile bracts"	9
9	"Floral tube less than 2.5 mm long; shrub with glabrous leaves of rocky areas west of Melbourne"	"Pimelea hewardiana"
9	"Floral tube more than 2.5 mm long"	10
10	"Involucral bracts 4–8"	"Pimelea ligustrina"
10	"Involucral bracts absent or 2"	11
11	"Inflorescence at maturity elongate, more than 20 mm long, interrupted, not subtended by leaves at maturity"	12
11	"Inflorescence at maturity compact, less than 20 mm long, usually closely subtended by leaves"	13
12	"Leaves usually 4–6 times as long as wide; flowers with all hairs white, the hairs uniform or variable in size"	"Pimelea trichostachya"
12	"Leaves usually 2–3 times as long as wide; flowers with both long brown hairs (although often white in bud) and minute hairs"	"Pimelea williamsonii"
13	"Herbaceous or semi-woody annual; leaves always alternate; inflorescence terminal, dense, many-flowered; far north-west Victoria"	"Pimelea simplex"
13	"Perennial shrub; leaves alternate or opposite; inflorescence of 1 or more terminal and/or axillary heads, each 3-many-flowered"	14
14	"Leaf upper surface glabrous or with hairs shorter and fewer than on lower surface, the lower surface sparsely to densely hairy; perianth 4.5–12 mm long, style portion of floral tube 1–5 mm long"	"Pimelea curviflora"
14	"Leaf surface covered with fine white appressed hairs, at least when young; perianth 3–4.5 mm long, style-portion of floral tube poorly defined, c. 0.8 mm long; mostly north-west Victoria"	"Pimelea micrantha"
15	"Floral tube glabrous outside (lobes may be hairy outside)"	16
15	"Floral tube at least partially hairy outside"	19
16	"Pedicel hairy"	17
16	"Pedicel glabrous"	18
17	"Involucral bracts distinctly thinner-textured than leaves; floral tube c. 15 mm long; Grampians"	"Pimelea pagophila"
17	"Involucral bracts similar to leaves in texture; floral tube 1–3 mm long"	"Pimelea serpyllifolia"
18	"Shrub 1–3 m high, branchlets not spinescent"	"Pimelea pauciflora"
18	"Subshrub less than 30 cm high, with spinescent branchlets"	"Pimelea spinescens subsp. spinescens"
19	"Flowers unisexual; ovary-portion of floral tube in female flowers longer than style-portion"	20
19	"Flowers bisexual or female; ovary-portion of floral tube shorter than style portion in flower (but not necessarily in fruit)"	22
20	"Subshrub, 5–30 cm high, with more or less spinescent branchlets; exceedingly rare, Wimmera"	"Pimelea spinescens subsp. pubiflora"
20	"Subshrub or shrub, 20 cm to 3 m high; branchlets not spinescent"	21
21	"Flowers in axillary heads; mostly moist forests and alpine shrublands"	"Pimelea axiflora"
21	"Flowers in terminal heads; mallee areas of north-west"	"Pimelea microcephala"
22	"Ovary portion of floral tube glabrous on outer surface, at least in proximal half"	23
22	"Outer surface of floral tube hairy throughout or almost throughout (sometimes with almost glabrous ovary-portion in fruit)"	24
23	"Involucral bracts 4, green throughout; ovary-portion of floral tube entirely glabrous outside"	"Pimelea glauca"
23	"Involucral bracts 9–11, cream at base; ovary-portion of floral tube hairy outside in distal half; far north-east Victoria"	"Pimelea treyvaudii"
24	"Involucral bracts with inside surface covered in long, soft hairs; stamens almost sessile; style not or scarcely exserted"	"Pimelea stricta"
24	"Involucral bracts with inside surface glabrous or only partially hairy; stamens with a definite filament; style exserted"	25
25	"Leaves crowded and confined to end of each branch; floral tube less than 6 mm long; alpine"	"Pimelea alpina"
25	"Leaves distributed along branches; floral tube more than 5 mm long"	26
26	"Leaves with lateral veins distinct on lower surface; floral tube with mixture of long and short hairs below circumscission point"	"Pimelea ligustrina"
26	"Leaves with only the midrib distinct on lower surface; floral tube with hairs all similar in size below circumscission point"	"Pimelea linifolia"