1	"Internodes and lower leaf surface with at least a sparse covering of hairs (visible with a hand lens), and often conspicuously hairy"	2
1	"Internodes and leaves glabrous (sometimes hairs present at the nodes)"	28
2	"Both sides of the leaf very densely hairy, hairs obscuring the surface"	3
2	"Hairs not obscuring the surface of the leaf (under magnification), at least on the upper side (section Epallage)"	4
3	"Inflorescence hemispherical to globose, with 6–12 involucral bracts"	"Pimelea penicillaris"
3	"Inflorescence cylindrical, involucral bracts absent"	"Pimelea amabilis"
4	"Longest rachis 1–18 mm long (at fruiting stage or after all flowers/fruits have fallen)"	5
4	"Longest rachis 18–250 mm long (at fruiting stage or after all flowers/fruits have fallen)"	21
5	"Leaves alternate, except at base of plant"	6
5	"Leaves opposite to sub-opposite throughout"	15
6	"Longest stem hairs > 1.2 mm long"	7
6	"Longest stem hairs < 1.2 mm long"	9
7	"Peduncles 10–32 mm long"	"Pimelea strigosa"
7	"Peduncles 0–1.5 mm long"	8
8	"Upper leaf surface glabrous; inflorescences terminal; seeds 2.8–2.9 mm long"	"Pimelea curviflora"
8	"Upper leaf surface conspicuously hairy; inflorescences lateral; seeds 3.4–3.8 mm long"	"Pimelea chlorina"
9	"Largest leaves 13–24 mm wide"	"Pimelea latifolia"
9	"Largest leaves 1.7–14 mm wide"	10
10	"Longest rachises cylindrical (3–)4–15 mm long (at fruiting stage or after all flowers/fruits have fallen); petioles 0.2–0.6 mm long; hairs on the floral tube 0.7–2.8 mm long"	11
10	"Longest rachises globose to ellipsoidal (at fruiting stage or after all flowers/fruits have fallen), 1–4 mm long; petioles 0.7–2.8 mm long; hairs on the floral tube 0.2–0.6 mm long"	12
11	"Floral tube hairs 0.6–0.9 mm long; rachis length 3–6 mm"	"Pimelea simplex subsp. simplex"
11	"Floral tube hairs 1.4–2.8 mm long; rachis length 6–15 mm"	"Pimelea simplex subsp. continua"
12	"Pedicels 40–80 per inflorescence; floral tube 3–4.4 mm long, not splitting; inner surface of sepals sparsely hairy; anthers 1–1.2 mm long"	"Pimelea rupestris"
12	"Pedicels 3–18 per inflorescence; floral tube 4.5–8.8 mm long, circumscissile; inner surface of sepals glabrous; anthers 1.8–2.8 mm long"	13
13	"Petioles 1.5–2.8 mm long; lamina with 8–12 pairs of lateral veins; lamina margins recurved"	"Pimelea plurinervia"
13	"Petioles 0.7–1 mm long; lamina with only midrib visible, or with 1–5 pairs of lateral veins; lamina margins flat"	14
14	"Hairs on lower leaf surface appressed, sparse, 0.25–0.6 mm long; hairs on floral tube 0.2–0.3 mm long"	"Pimelea leptospermoides subsp. leptospermoides"
14	"Hairs on lower leaf surface antrorse to patent, dense, 0.8–0.9 mm long; hairs on floral tube 0.4–0.6 mm long"	"Pimelea leptospermoides subsp. bowmanii"
15	"Peduncles 0–3 mm long at fruiting stage"	16
15	"Peduncles 4–28 mm long at fruiting stage"	20
16	"Leaves strictly opposite"	17
16	"At least some leaf pairs sub-opposite, separated by 1–5 mm on stem"	18
17	"Stems hairs appressed; pedicels 8–14 on each rachis; floral tube 4.2–6.8 mm long; sepals acute"	"Pimelea umbratica"
17	"Stems hairs antrorse; pedicels 3–4 on each rachis; floral tube 9.7–12 mm long; sepals obtuse"	"Pimelea aquilonia"
18	"Lamina 2.5–6 mm wide, upper surface glabrous"	"Pimelea curviflora"
18	"Lamina 8–23 mm wide, upper surface hairy"	19
19	"Lamina 33–82 mm long; sepals 3.1–4 mm long, acute; floral tube 8.5–11 mm long"	"Pimelea gigandra"
19	"Lamina 14–38 mm long; sepals 0.9–1.6 mm long, obtuse; floral tube 5.2–8.2 mm long"	"Pimelea altior"
20	"Longest stem hairs 0.6–0.8 mm long, appressed; upper leaf surface glabrous; pedicels 12–18 on each rachis"	"Pimelea fugiens"
20	"Longest stem hairs 1.8–2.6 mm long, antrorse or patent; upper leaf surface hairy; pedicels 24–45 on each rachis"	"Pimelea mollis"
21	"Rachis readily visible between the persistent pedicels (pedicels 2–20 per cm at midpoint of rachis)"	22
21	"Rachis obscured by tightly packed persistent pedicels (pedicels 20–90 per cm at midpoint of rachis)"	25
22	"Annual herbs; leaves 0.7–2.8 mm wide; sepals 0.4–0.8 mm long"	23
22	"Perennial shrubs; leaves 3–9 mm wide; sepals 0.8–2.1 mm long"	24
23	"Hairs on the floral tube 0.3–0.5 mm long, appressed; 17–42 pedicels per inflorescence"	"Pimelea elongata"
23	"Hairs on the floral tube 1.5–2 mm long, patent; 45–85 pedicels per inflorescence"	"Pimelea trichostachya"
24	"Floral tube 4.2–5.4 mm long, with longest hairs 1–1.4 mm long; sepals 1.5–2.1 mm long"	"Pimelea sericostachya"
24	"Floral tube 3.1–3.9 mm long, with longest hairs 0.4–0.6 mm long; sepals 0.8–1.2 mm long"	"Pimelea leptostachya"
25	"Leaves obovate, 13–24 mm wide; longest stem hairs 0.6–1 mm long, antrorse to patent; floral tube white, with longest hairs 0.2–0.5 mm long"	"Pimelea latifolia"
25	"Leaves elliptic to narrowly-elliptic, 2–11 mm wide; longest stem hairs 1.2–2.5 mm long, appressed; floral tube yellow-green to yellow, with longest hairs 0.7–1.9 mm long"	26
26	"Petioles 1.5–1.8 mm long; lower leaf surface with sparse to moderately dense hairs, the longest ones 2.2–2.7 mm long"	"Pimelea approximans"
26	"Petioles 0.3–1.5 mm long; lower leaf surface with dense to very dense hairs, the longest ones 0.8–2.1 mm long"	27
27	"Hairs on the upper leaf surface 0.7–1.5 mm long; anthers 1–1.1 mm long"	"Pimelea amabilis"
27	"Hairs on the upper leaf surface 0.3–0.6 mm long; anthers 1.1–1.3 mm long"	"Pimelea confertiflora"
28	"Largest leaves 35–70 mm long"	29
28	"Largest leaves 10–35 mm long"	31
29	"Inflorescence hemispherical, with several involucral bracts; flowers white"	"Pimelea ligustrina subsp. ligustrina"
29	"Inflorescence cylindrical; involucral bracts absent; flowers red"	30
30	"Leaves 1.5–3(–3.5) times longer than broad; hairs on fruit 4–6 mm long; longest hairs on upper part of floral tube 2–3 mm long, antrorse"	"Pimelea decora"
30	"Leaves 3–7 times longer than broad; hairs on fruit 1.5–2.5 mm long; upper part of floral tube with longest hairs 0.3–1.5 mm long, patent"	"Pimelea haematostachya"
31	"Involucral bracts 2; fruits fleshy"	32
31	"Involucral bracts 4; fruits dry"	33
32	"Floral tube hairy throughout"	"Pimelea microcephala subsp. microcephala"
32	"Floral tube glabrous"	"Pimelea neoanglica"
33	"Floral tube with hairs, at least in upper part; involucral bracts free"	34
33	"Floral tube glabrous; involucral bracts fused in lower half"	35
34	"Sparse hairs extending to base of floral tube; all bracts glabrous"	"Pimelea linifolia"
34	"Lowest 1–3 mm of floral tube glabrous; at least the upper pair of bracts with ciliate margins"	"Pimelea glauca"
35	"Erect herb; flowers white; pedicels 1–4 mm long"	"Pimelea cornucopiae"
35	"Prostrate or sprawling herb; flowers red; pedicels 0.2–1 mm long"	"Pimelea sanguinea"