1	"Stems hairy for at least a few internodes below each inflorescence; leaves hairy or sometimes glabrous"	2
1	"Stems glabrous or rarely with a few hairs on peduncle but not on internodes below; leaves glabrous (rarely ciliate in P. imbricata )"	43
2	"Flowers glabrous outside, very rarely with a few minute hairs at base"	"Pimelea serpyllifolia"
2	"Flowers hairy outside"	3
3	"Leaves glabrous adaxially, very densely hairy abaxially, opposite; stamens with a well developed filament, anther locules semi-latrorse or latrorse"	4
3	"Leaves glabrous to densely hairy on both surfaces, alternate or opposite, if similar to above then stamens subsessile and anther locules introrse"	6
4	"Hypanthium 4–4.5 mm long, splitting irregularly at base in fruit; sepals c. 1.5 mm long"	"Pimelea cinerea"
4	"Hypanthium 5.5–10 mm long, circumscissile; sepals 2–4.5 mm long"	5
5	"Leaves with the petiole so strongly incurved that the glabrous adaxial surface is hidden, the margin of lamina strongly recurved"	"Pimelea nivea"
5	"Leaves with a relatively flat petiole and lamina"	"Pimelea sericea"
6	"Style-portion of hypanthium sparsely to moderately densely hairy inside for at least a short portion of its length; sepals glabrous or hairy inside"	7
6	"Hypanthium and sepals glabrous inside"	19
7	"Stamens much shorter than sepals, often subsessile; anthers flat, locules strictly introrse"	8
7	"Stamens shorter or longer than sepals; anthers not flat but sometimes shallowly triangular in T.S., locules semi-latrorse or rarely almost introrse"	13
8	"Sessile involucral bracts absent; flowers 1 to several per axil of leafy inflorescence or in a few-flowered terminal cluster"	9
8	"Sessile involucral bracts 3–22; inflorescence a 3–many-flowered terminal head"	12
9	"Sepals erect, 1–1.5 mm long"	"Pimelea interioris"
9	"Sepals spreading, 2–5 mm long"	10
10	"Leaves alternate; lateral veins becoming almost parallel to margin distally"	"Pimelea leptospermoides"
10	"Leaves opposite; lateral veins indistinct, or if visible, continuously acutely angled to the margin"	11
11	"Leaves with lateral veins indistinct; hypanthium 9–11.5 mm long"	"Pimelea aquilonia"
11	"Leaves with lateral veins visible; hypanthium 5–7.5 mm long"	"Pimelea umbratica"
12	"Involucral bracts 3–6, glabrous on abaxial surface; flowers 3–18 per head"	"Pimelea phylicoides"
12	"Involucral bracts 6–12, hairy on both surfaces; flowers 25 or more per head"	"Pimelea octophylla"
13	"Plant dioecious (occasionally with rare bisexual flowers on otherwise unisexual inflorescences); sessile involucral bracts absent but inflorescence subtended by 2 or 4 shortly petiolate bracts"	14
13	"Plant gynodioecious or bisexual; sessile involucral bracts 4 or more"	15
14	"Involucral bracts narrowly elliptic to elliptic, usually exceeding male inflorescence; style-portion of female hypanthium 1–1.5 mm long; seeds foveate"	"Pimelea petrophila"
14	"Involucral bracts elliptic to circular, usually broadly elliptic, often not exceeding male inflorescence; style-portion of female hypanthium 0.5–1 mm long; seeds furrowed"	"Pimelea flava"
15	"Involucral bracts 4 or rarely 6"	"Pimelea humilis"
15	"Involucral bracts 8–20"	16
16	"Leaves opposite; hypanthium glabrous at extreme base outside, with hairs above all less than 0.5 mm long or with a mixture of short and long hairs"	"Pimelea villifera"
16	"Leaves alternate or rarely opposite; hypanthium hairy to base outside, if leaves opposite then hairs on outside of tube all more than 0.5 mm long"	17
17	"Involucral bracts glabrous or nearly so outside, prominently ciliate; peduncle moderately hairy, reddish immediately below inflorescence"	"Pimelea ciliolaris"
17	"Involucral bracts usually hairy outside, if glabrous then without prominent cilia; peduncle glabrous to densely hairy, very rarely reddish and if so then usually glabrous or subglabrous"	18
18	"Hairs of hypanthium long on ovary-portion, abruptly shorter on style-portion"	"Pimelea subvillifera"
18	"Hairs of hypanthium not longer on ovary-portion or slightly longer and grading into shorter hairs on style-portion"	"Pimelea imbricata"
19	"Inflorescence of 1 or 2 terminal flowers"	20
19	"Inflorescence of more than 2 flowers or not regularly 1- or 2-flowered, sometimes of axillary clusters"	21
20	"Leaves ciliate, otherwise glabrous or nearly so; flowers solitary; hypanthium 1.5–3 mm long"	"Pimelea pygmaea"
20	"Leaves hairy on abaxial surface, otherwise glabrous; flowers paired; hypanthium 4–7 mm long"	"Pimelea biflora"
21	"Plant dioecious (see also P. milliganii )"	22
21	"Plant bisexual or gynodioecious"	27
22	"Sessile involucral bracts 6–12; hypanthium 5.5–11 mm long; inflorescence terminal"	23
22	"Sessile involucral bracts absent; shortly petiolate bracts absent or less than 5; hypanthium 0.8–4.5 mm long, or if longer, then flowers in axillary clusters"	24
23	"Involucral bracts broadly ovate or broadly elliptic; hypanthium of female flowers circumscissile above ovary"	"Pimelea penicillaris"
23	"Involucral bracts linear to narrowly elliptic-ovate; hypanthium persistent or tearing irregularly above the fruit"	"Pimelea ammocharis"
24	"Hypanthium of male flowers 3–6 mm long; flowers all or mainly in axillary clusters"	25
24	"Hypanthium of male flowers 0.8–4 mm long; flowers usually in terminal heads or in the forks of young branches, if axillary then hypanthium 0.8–2 mm long."	26
25	"Peduncle with minute sessile bracts below involucral bracts; pedicels to 0.5 mm long"	"Pimelea axiflora"
25	"Sessile bracts absent; pedicels of male flowers 1.5–6 mm long28. P. argentea"	"Pimelea argentea"
26	"Inflorescence subtended by 4 or rarely 2 leaves which are larger than the leaves below"	"Pimelea hewardiana"
26	"Inflorescence bare or subtended by 2 bracts which are smaller than the leaves below"	"Pimelea clavata"
27	"Fruit succulent, naked at maturity"	"Pimelea drupacea"
27	"Fruit dry, enclosed in persistent base of hypanthium"	28
28	"Sessile involucral bracts 4 or more"	29
28	"Sessile involucral bracts absent or 2"	32
29	"Leaves completely glabrous; involucral bracts well differentiated from leaves in size and/or colour; stamens with a definite filament"	30
29	"Leaves somewhat to densely hairy, at least on abaxial surface; involucral bracts leaf-like in size and colour; stamens subsessile"	31
30	"Hypanthium not circumscissile; ovary glabrous"	"Pimelea ferruginea"
30	"Hypanthium circumscissile; ovary distally hairy"	"Pimelea ligustrina"
31	"Hypanthium not circumscissile but sometimes irregularly tearing; sepals 1.5–4 mm long"	"Pimelea ammocharis"
31	"Hypanthium circumscissile; sepals 5–6 mm long"	"Pimelea longiflora"
32	"Inflorescence many-flowered, becoming elongate and often interrupted at maturity (except sometimes in P. simplex ), not subtended by leaves at maturity; style-portion of hypanthium usually scarcely developed"	33
32	"Inflorescence 2–many-flowered, compact, closely subtended by leaves; style-portion of hypanthium usually well developed (except in P. micrantha )"	37
33	"Stems, leaves and inflorescence with shiny hairs, which may become dull with age; hairs of hypanthium and sepals rather uniform, antrorse"	"Pimelea sericostachya"
33	"Stems, leaves and inflorescence with dull hairs; hairs of hypanthium very variable in length or relatively uniform, antrorse or spreading"	34
34	"Flowers with both long brown hairs (often white in bud) and minute hairs; leaves usually 2.5–3 times as long as wide"	"Pimelea williamsonii"
34	"Flowers nearly always with all hairs white, the hairs variable or rather uniform in size; leaves usually 4–6 times as long as wide"	35
35	"Mature inflorescence dense, to 18 mm long"	"Pimelea simplex"
35	"Mature inflorescence interrupted, usually 30–150 mm long"	36
36	"Persistent base of hypanthium with a close dense white indumentum of short antrorse hairs"	"Pimelea elongata"
36	"Persistent base of hypanthium grey in fruit, with a mixture of long spreading hairs and minute hairs"	"Pimelea trichostachya"
37	"Stamens with filaments 0.5–1.3 mm long; anther locules sometimes latrorse"	38
37	"Stamens subsessile; anther locules introrse or semi-latrorse"	39
38	"Leaves densely hairy, silvery; anther locules semi-latrorse to introrse"	"Pimelea milliganii"
38	"Leaves sparsely hairy, dull green; anther locules latrorse"	"Pimelea venosa"
39	"Leaves opposite, glabrous adaxially, densely hairy on margins and midrib but otherwise sparsely hairy abaxially"	"Pimelea umbratica"
39	"Leaves alternate or opposite, often hairy adaxially, sparsely to densely hairy abaxially, the hairs not much more concentrated on margins and midrib than elsewhere"	40
40	"Fruiting peduncle 10–55 mm long or not uniformly less than 10 mm long"	"Pimelea strigosa"
40	"Fruiting peduncle to 10 mm long"	41
41	"Leaves concolorous, densely hairy on both surfaces when young, often silvery; style-portion of hypanthium scarcely developed, c. 0.8 mm long; fruit pear-shaped"	"Pimelea micrantha"
41	"Leaves often discolorous, usually glabrous or less densely hairy on one surface, usually green; style-portion of hypanthium usually well developed, 2–5 mm long in bisexual flowers; fruit not pear-shaped, uniformly expanding towards one end"	42
42	"Leaves usually glabrous or subglabrous adaxially, without rounded projections; lamina to 8.5 mm wide, usually 3–4.5 times as long as wide"	"Pimelea curviflora"
42	"Leaves hairy on both surfaces, if only sparsely hairy adaxially then with small rounded projections; lamina to 27 mm wide, usually 2–3 times as long as wide"	"Pimelea latifolia"
43	"Plant dioecious or rarely monoecious; ovary-portion of hypanthium in female flowers longer than style-portion (except in P. gilgiana )"	44
43	"Plant bisexual or gynodioecious; ovary-portion of hypanthium shorter than or rarely as long as style-portion in flower but not necessarily in fruit"	54
44	"Female inflorescences much hairier than male; involucral bracts well differentiated from leaves, becoming deep red-purple in fruit"	"Pimelea gilgiana"
44	"Female inflorescence not more obviously hairy than male inflorescence; involucral bracts absent or leaf-like, green"	45
45	"Undershrub with spinescent branchlets"	"Pimelea spinescens"
45	"Undershrub to large shrub, branchlets not spinescent"	46
46	"Pedicels glabrous or nearly so; flowers completely glabrous"	47
46	"Pedicels definitely hairy; flowers hairy or glabrous"	48
47	"Inflorescence remaining compact; fruit succulent, naked at maturity"	"Pimelea pauciflora"
47	"Inflorescence becoming elongate and interrupted in fruit; fruit dry, enclosed in persistent hypanthium"	"Pimelea forrestiana"
48	"Sepals hairy inside; stamens subsessile"	"Pimelea pelinos"
48	"Sepals glabrous inside; stamens with a short or long filament"	49
49	"Flowers in axillary clusters or only some terminal, with small green or brown bracts below larger involucral bracts"	"Pimelea axiflora"
49	"Flowers in terminal heads or terminating short leafy lateral branchlets, without small bracts below involucral bracts"	50
50	"Mature fruit succulent, naked"	51
50	"Mature fruit dry, enclosed in persistent hypanthium"	52
51	"Flowers hairy outside on tube and/or sepals, sepals of female flowers 0.2–1 mm long, 0.3–1 mm wide"	"Pimelea microcephala"
51	"Flowers glabrous or with a few short hairs outside; sepals of female flowers 0.3–0.5 mm long, c. 0.3 mm wide"	"Pimelea neo-anglica"
52	"Flowers densely hairy outside; leaves alternate, 0.4–3.2 mm long"	"Pimelea halophila"
52	"Flowers glabrous outside; leaves opposite, 1–26 mm long"	53
53	"Hypanthium of male flowers 1.8–2.5 mm long; ovary distally hairy"	"Pimelea serpyllifolia"
53	"Hypanthium of male flowers 3–5.5 mm long; ovary glabrous"	"Pimelea spiculigera"
54	"Involucral bracts absent; pedicels glabrous or nearly so; inflorescence interrupted at maturity or, if continuous, then stamen solitary"	55
54	"Sessile involucral bracts present; pedicels densely hairy (except in P. bracteata ); inflorescence continuous; stamens 2"	56
55	"Pedicels slightly hairy at first; hypanthium wholly persistent; stamen 1, longer than sepals"	"Pimelea filiformis"
55	"Pedicels glabrous; hypanthium circumscissile; stamens 2, shorter than sepals"	"Pimelea spicata"
56	"Nodes not protruding adaxially beyond petiole; inflorescence elongate at maturity; involucral bracts deciduous or persistent"	57
56	"Nodes adaxially prominent, c. twice as thick as petiole; inflorescence compact or (in P. ligustrina ) sometimes becoming somewhat elongate; involucral bracts persistent"	59
57	"Rachis to 2 cm long; involucral bracts persistent; sepals 2.5–3 mm long"	"Pimelea holroydii"
57	"Rachis 4–22 cm long at maturity; involucral bracts deciduous; sepals 4–7 mm long"	58
58	"Leaves usually ovate or elliptic; rachis usually 15–22 cm long at maturity; hypanthium 14–17 mm long, with a mixture of long and short hairs throughout"	"Pimelea decora"
58	"Leaves usually narrowly ovate or narrowly elliptic; rachis 4–13 cm long at maturity; hypanthium 10.5–13 mm long, with long hairs proximally and short hairs above"	"Pimelea haematostachya"
59	"Hypanthium not circumscissile and/or with short hairs on ovary-portion of hypanthium and a band of much longer spreading hairs above; ovary glabrous"	60
59	"Hypanthium circumscissile above ovary (except sometimes in P. imbricata ), glabrous or the hairs not as above, if not circumscissile then ovary distally hairy"	75
60	"Leaf margins flat or incurved"	61
60	"Leaf margins recurved to revolute laterally or just recurved at apex"	66
61	"Stamens shorter than sepals; filament 0.3–1.5 mm long"	"Pimelea brevifolia"
61	"Stamens nearly always equalling to greatly exceeding sepals; filament 2–7 mm long"	62
62	"Sepals hairy inside at least at base; hypanthium glabrous inside"	"Pimelea spectabilis"
62	"Sepals glabrous inside; hypanthium glabrous inside or with a ring of hairs at throat"	63
63	"Hypanthium glabrous inside, the long hairs on outside mixed with short hairs; sepals moderately densely hairy, with both long and short hairs"	64
63	"Hypanthium with hairs inside at throat and/or with the long hairs on outside not mixed with short hairs; sepals sparsely hairy, the hairs all of a similar size"	65
64	"Outer involucral bracts without distinct yellow margins; flowers not circumscissile"	"Pimelea hispida"
64	"Outer involucral bracts with distinct yellow margins 0.5–1.5 mm wide; flowers circumscissile"	"Pimelea lanata"
65	"Ovary-portion of hypanthium with reflexed hairs; leaves concolorous, dull"	"Pimelea rara"
65	"Ovary-portion of hypanthium glabrous or with spreading to antrorse hairs; leaves discolorous, with a sheen on adaxial surface"	"Pimelea lehmanniana"
66	"Anthers subsessile, the locules strictly introrse, slightly exceeded laterally by connective; stigma not or scarcely exserted"	"Pimelea brevistyla"
66	"Anthers with a filament 0.7–5.5 mm long, the locules semi-latrorse to latrorse, laterally exceeding connective; stigma prominently exserted"	67
67	"Longest hairs of hypanthium not mixed with short hairs, at least 4 times longer than shortest hairs of tube"	68
67	"Longest hairs of hypanthium either mixed with short hairs or (in P. brachyphylla ) sometimes not much longer than shortest hairs of tube"	69
68	"Leaves shortly petiolate, not stem-clasping; hypanthium with a ring of hairs inside at throat"	"Pimelea lehmanniana"
68	"Leaves sessile, somewhat stem-clasping; hypanthium glabrous inside"	"Pimelea sessilis"
69	"Anthers 0.3–0.5 mm long; hypanthium 4–8 mm long, white"	"Pimelea brachyphylla"
69	"Anthers 0.6–1.5 mm long; hypanthium 8–18 mm long, or if 7–8 mm long, then pink"	70
70	"Inner involucral bracts hairy inside except on margins"	"Pimelea lanata"
70	"Inner involucral bracts glabrous inside or with hairs confined to base or centre"	71
71	"Stamens slightly to greatly exceeding sepals; filament 3.3–5.5 mm long"	"Pimelea ciliata"
71	"Stamens shorter than to exceeding sepals; filament 0.7–2.5 mm or rarely 2.5–3 mm long"	72
72	"Flowers pale to deep pink; leaf margins not becoming revolute"	73
72	"Flowers white to pale yellow at maturity; leaf margins usually becoming revolute when dry"	74
73	"Leaves flexible; peduncle 4–35 mm long"	"Pimelea rosea"
73	"Leaves rather stiff; peduncle to 3 mm long"	"Pimelea ferruginea"
74	"Flowers pale yellow or cream; hypanthium 12–18 mm long"	"Pimelea leucantha"
74	"Flowers white; hypanthium 8–12 mm long"	"Pimelea avonensis"
75	"Flowers hairy inside distal part of hypanthium; involucral bracts 6–40, or if regularly 4, then inflorescence pendulous"	76
75	"Flowers glabrous inside hypanthium, or (in P. alpina ) sometimes sparsely hairy inside and then with 4 involucral bracts and the inflorescence erect"	82
76	"Flowers glabrous outside"	77
76	"Flowers hairy outside, sometimes glabrescent in fruit"	79
77	"Involucral bracts distinctly thinner than leaves and a different colour outside, pale green or with yellow and/or red tints"	"Pimelea pagophila"
77	"Involucral bracts similar to leaves in texture and similar in colour outside but sometimes deep purple inside"	78
78	"Anther locules semi-latrorse; hypanthium white or sometimes pink, distinctly expanded in distal half"	"Pimelea sylvestris"
78	"Anther locules strictly introrse; hypanthium pink, only slightly expanded in distal half"	"Pimelea calcicola"
79	"Inflorescence pendulous; involucral bracts 4 or 6; persistent base of hypanthium glabrescent outside in fruit"	"Pimelea macrostegia"
79	"Inflorescence erect; involucral bracts 8 to numerous; persistent base of hypanthium remaining hairy"	80
80	"Involucral bracts c. 40; leaves alternate"	"Pimelea graniticola"
80	"Involucral bracts 8–20; leaves opposite or sometimes alternate"	81
81	"Ovary-portion of hypanthium densely hairy throughout; involucral bracts usually green or yellowish at base, sometimes ciliate and then usually dentate"	"Pimelea imbricata"
81	"Ovary-portion of hypanthium glabrous at extreme base, densely hairy above; involucral bracts reddish at base, densely ciliate, entire"	"Pimelea erecta"
82	"Flowers glabrous outside on ovary-portion or proximal half of ovary-portion"	83
82	"Flowers hairy outside to (or almost to) the base but in some species glabrescent on ovary-portion in fruit"	88
83	"Flowers densely hairy above ovary-portion of hypanthium; inner involucral bracts ciliate"	84
83	"Flowers glabrous or with few hairs on sepals or on distal part of hypanthium; involucral bracts not ciliate or sometimes with a few cilia"	85
84	"Involucral bracts 9–11, cream at base; ovary-portion of hypanthium hairy in distal half"	"Pimelea treyvaudii"
84	"Involucral bracts 4, green throughout; ovary-portion of hypanthium glabrous"	"Pimelea glauca"
85	"Pedicels glabrous; ovary distally hairy, glabrous below"	"Pimelea bracteata"
85	"Pedicels hairy; ovary glabrous or with hairs not confined to distal part"	86
86	"Flowers glabrous, pale green; ovary glabrous or with hairs confined to basal half"	"Pimelea pendens"
86	"Flowers with at least a few hairs on sepals, or if glabrous, then yellow; ovary hairy throughout"	87
87	"Sepals glabrous or with a few hairs along midrib outside; flowers yellow"	"Pimelea aeruginosa"
87	"Sepals hairy outside, the hairs not confined to midrib; flowers creamy green to pale yellow"	"Pimelea cracens"
88	"Ovary glabrous"	89
88	"Ovary minutely or distinctly hairy at least at apex"	93
89	"Sepals erect, very narrowly triangular; staminal filament 11.5–16 mm long"	"Pimelea physodes"
89	"Sepals spreading, narrowly ovate to elliptic; staminal filament to 7 mm long"	90
90	"Stamens subsessile, the filament 0.1–0.5 mm long; connective slightly exceeding anther locules laterally; style not or scarcely exserted"	"Pimelea preissii"
90	"Stamens with definite filament 1–7 mm long; connective laterally exceeded by anther locules; style exserted"	91
91	"Involucral bracts 6 or more, the innermost ones ciliate at least near base"	"Pimelea drummondii"
91	"Involucral bracts 4 or very rarely more, not ciliate"	92
92	"Involucral bracts usually uniformly green, slightly overlapping; hypanthium with hairs all spreading to antrorse"	"Pimelea angustifolia"
92	"Involucral bracts reddish at base outside, greatly overlapping; hypanthium with minute retrorse hairs in the 2–4 mm distal to circumscission point, elsewhere with spreading to antrorse hairs"	"Pimelea floribunda"
93	"Ovary hairy throughout, without a definite apical tuft of hairs"	94
93	"Ovary with an apical tuft of hairs, glabrous or with few hairs below"	96
94	"Involucral bracts not ciliate"	"Pimelea cracens"
94	"Inner involucral bracts densely ciliate"	95
95	"Ovary-portion of hypanthium with both long and short hairs throughout; inner involucral bracts glabrous or sometimes slightly hairy inside"	"Pimelea tinctoria"
95	"Ovary-portion of hypanthium with short hairs, if also with long hairs then these confined to distal part; inner involucral bracts usually hairy inside"	"Pimelea suaveolens"
96	"Stamens subsessile; anther locules strictly introrse; style not or scarcely exserted"	"Pimelea stricta"
96	"Stamens with a definite filament; anther locules nearly always semi-latrorse to latrorse; style exserted"	97
97	"Leaf margins slightly to distinctly recurved, discolorous"	98
97	"Leaf margins incurved, concolorous or sometimes discolorous"	99
98	"Leaves with lateral veins distinct on abaxial surface; hypanthium with a mixture of long and short hairs below circumscission point"	"Pimelea ligustrina"
98	"Leaves with only the midrib distinct; hypanthium with hairs all similar in size below circumscission point"	"Pimelea linifolia"
99	"Involucral bracts 6 or more, the innermost ones ciliate; flowers yellow, in a pendulous head"	"Pimelea sulphurea"
99	"Involucral bracts 4 or rarely more, not ciliate; flowers usually white or pink, if yellow then in an erect head"	100
100	"Leaves crowded and confined to the end of each branch; flowers often sparsely hairy inside hypanthium"	"Pimelea alpina"
100	"Leaves more widely distributed than in P. alpina ; flowers glabrous inside hypanthium"	101
101	"Anther locules semi-latrorse or rarely introrse; leaves with only the midrib prominent"	"Pimelea angustifolia"
101	"Anther locules latrorse, or if semi-latrorse, then leaves with prominent intra-marginal veins"	"Pimelea linifolia"