1	"Plants usually shrubs, very rarely annual herbs and the with sparsely to densely hairy stems; involucral bracts0–40 or more; pedicels terete, often hairy"	2
1	"Plants glabrous annuals; involucral bracts 4; pedicels dorsiventrally compressed, glabrous"	50
2	"Plants dioecious"	3
2	"Plants bisexual or gynodioecious"	12
3	"Floral tube or female flowers 5–11 mm long, style-portion much longer than ovary-portion"	4
3	"Floral tube of female flowers 1.5–3.5(–5) mm long, style-portion shorter than ovary-portion"	5
4	"Stems and leaves hairy; fruit enclosed in the persistent base of floral tube"	"Pimelea ammocharis"
4	"Stems and leaves glabrous; fruit naked at maturity"	"Pimelea gilgiana"
5	"Sepals hairy inside; anthers subsessile"	"Pimelea pelinos"
5	"Sepals glabrous inside; anthers with a filament 0.4–1.4 mm long"	6
6	"Flower cluster on a very short axillary branchlet, appearing strictly axillary; male pedicels 1.5–6 mm long"	"Pimelea argentea"
6	"Flower cluster terminal or on a short but definitely axillary branchlet; male pedicels 0.2–1 mm long"	7
7	"Leaves 1–5(–6) mm long"	8
7	"Leaves mostly 10–20 mm long, always with some 6 mm long"	9
8	"Stems hairy near each inflorescence; flowers glabrous or nearly so outside, somewhat to very hairy inside floral tube"	"Pimelea serpyllifolia"
8	"Stems glabrous; flowers hairy outside, glabrous inside"	"Pimelea halophila"
9	"Flowers densely hairy outside; fruit succulent"	10
9	"Flowers glabrous; fruit dry"	11
10	"Stems hairy at first’ fruit enclosed in persistent base of floral tube"	"Pimelea clavata"
10	"Stems glabrous; fruit naked at maturity"	"Pimelea microcephala"
11	"Pedicels densely hairy; inflorescence compactor sometimes elongate at maturity, rarely appearing branched, subtended by 2or 4 sessile leaf-like bracts"	"Pimelea spiculigera"
11	"Pedicels glabrous or subglabrous; inflorescence elongate at maturity, commonly appearing branched, each”branch” subtended by a deciduous brown bract and petiolate leaves"	"Pimelea forrestiana"
12	"Stems very pale yellow-brown in distal 100–200 mm; inflorescence elongate at maturity, involucral bracts 4–7, glabrous outside"	"Pimelea holroydii"
12	"Stems either becoming brown or grey to black shortly below apex or (in P. trichostachya) becoming reddish; inflorescence compact or, if elongate, then bracts either 4 and hairy outside or absent"	13
13	"Ovary glabrous; floral tube not circumscissile or, if so, then with short hairs on ovary-portion and a zone of much longer patent hairs above"	14
13	"Ovary hairy or, if not, then floral tube circumscissile above ovary in fruit, hairs of floral tube (when present) not as above"	28
14	"Leaves sessile, the base slightly stem-clasping; involucral bracts more or less circular"	"Pimelea sessilis"
14	"Leaves all or mostly with a petiole 0.2–2 mm long, not stem-clasping; involucral bracts usually narrowly to broadly ovate, sometimes more or less elliptic or obovate"	15
15	"Stamens much shorter than sepals, subsessile (filament 0.1–0.4 mm long), anther 0.5–0.7 mm wide; leaves with the margins distinctly incurved or inrolled, often tending to become linear"	"Pimelea brevistyla"
15	"Stamens much shorter than to greatly exceeding sepals, usually with a filament 0.7–8 mm long (but occasionally subsessile in P. brevifolia, which has the anther0.2–0.4 mm wide); leaves with the margins incurved to revolute but never inrolled, if tending to become linear then the margins revolute"	16
16	"Swollen base of floral tube with the lowest hairs reflexed to retrorse, these retrorse hairs usually extending higher but sometimes becoming more or less patent towards summit of floral tube, sometimes mixed with some larger patent to antrorse hairs in distal half of tube"	17
16	"Swollen base of floral tube glabrous or with appressed to widely antrorse or more or less patent hairs throughout, often with a mixture off large and minute hairs , especially towards the summit of tube"	19
17	"Inner involucral bracts glabrous or with very hairs inside"	"Pimelea rara"
17	"Inner involucral bracts appressed-hairy inside (but often with a narrow glabrous margin)"	18
18	"Involucral bracts with distinct pink to reddish margins indistinct in colour; flowers not circumscissile"	"Pimelea hispida"
18	"One or both pairs of involucral bracts with distinct yellow margins; flowers circumscissile"	"Pimelea lanata"
19	"Flowers with hairs at throat and on base of each sepal"	20
19	"Flowers glabrous inside"	21
20	"Flowers with a ring of long retrorse hairs in the throat and also antrorse hairs on base of each sepal; floral tube either circumscissile or glabrous on swollen base"	"Pimelea lehmanniana"
20	"Flowers with antrorse to patent hairs in the throat and inside of sepals; floral tube persistent. swollen base of floral tube with fine minute hairs 0.1–0.3 mm long and sometimes a few large hairs towards summit"	"Pimelea spectabilis"
21	"Leaves with upper surface convex, the margins incurved"	"Pimelea brevifolia"
21	"Leaves with upper surface concave, the margins recurved or revolute"	22
22	"Floral tube with the longer hairs widespread or at least extending through distal half of swollen base to half way up the slender portion of tube, hairs of upper part of tube mostly more or less patent"	23
22	"Floral tube with a belt of long spreading or antrorse hairs restricted to less than half of the swollen base and/or less than half of the slender portion of tube, hairs of the upper part of floral tube mostly antrorse or appressed"	24
23	"Leaves 3–11 mm long, with a distinct mucro; flowers with the slender portion of tube 1.5–4.5 mm long, the largest hairs 0.4–2.5 mm long; anthers 0.3–0.6 mm long"	"Pimelea brachyphylla"
23	"Leaves 5–24 mm long, scarcely mucronate; flowers with the slender portion of tube 4–9 mm long, the largest hairs 1.5–3 mm long; anthers 0.5–1.1 mm long"	"Pimelea avonensis"
24	"Leaf apex acute at 75–105 degrees or obtuse, not mucronate or with a short broad mucro"	25
24	"Leaf apex tapered at 30–60 degrees, usually with a rather narrow mucro or slender point"	26
25	"Inner bracts 6–12 mm long; flowers usually distinctly pink, slender portion of floral tube 4–8 mm long; seed rather dull, commonly 2.3–2.6 x 1.1–1.3 mm"	"Pimelea ferruginea"
25	"Inner bracts 13–20 mm long; flowers white to yellow, slender portion of floral tube 9–14 mm long; seed shiny, commonly 2.3–2.8 x 0.7–1.1 mm"	"Pimelea leucantha"
26	"Outer bracts ciliate; floral tube with long hairs absent from swollen base or only present on summit; stamens slightly to greatly exceeding sepals, filament 2.5–4.5 mm long"	"Pimelea ciliata"
26	"Outer bracts glabrous and/or floral tube with long hairs extending onto distal half of swollen base; stamens usually distinctly shorter than sepals, filament 0.7–2.5 mm long, sometimes longer in P. neokyrea"	27
27	"Large hairs of floral tube extending from summit of swollen portion to about half way up the slender portion; sepals white to pale yellow on upper surface"	"Pimelea neokyrea"
27	"Large hairs of floral tube extending from near the middle of swollen portion onto basal part of slender portion; sepals usually pale to deep pink on upper surface"	"Pimelea rosea"
28	"Style-portion of floral tube shorter than ovary portion; sessile involucral bracts absent"	29
28	"Style-portion of floral tube longer than ovary-portion in flower; sessile involucral bracts present"	30
29	"Inflorescence elongate at maturity; floral tube 3–4 mm long, the longest hairs 2.5–3 mm long"	"Pimelea trichostachya"
29	"Inflorescence compact; floral tube 2–2.5 mm long, with hairs up to 0.5 mm long"	"Pimelea micrantha"
30	"Sepals erect, very narrowly triangular, 5–9 mm long; stamens with filaments 11.5–16 mm long , anthers 2–3 mm long"	"Pimelea physodes"
30	"Sepals spreading, narrowly ovate to elliptic, 1.5–6 mm long; stamens with filaments up to 7 mm long, anthers 0.5–2 mm long"	31
31	"Flowers hairy inside in the distal half of floral tube; flower head erect"	32
31	"Flowers glabrous inside; flower held pendulous or erect"	38
32	"Flowers glabrous outside; bracts 6(8), usually distinct from the leaves"	33
32	"Flowers hairy outside; bracts (6–)8–numerous, usually similar to and often grading into the leaves"	34
33	"Anther slits semi-lateral; floral tube white or, if pink, then distinctly expanded in distal half"	"Pimelea sylvestris"
33	"Anther slits strictly adaxial; floral tube pink, only slightly expanded in distal half"	"Pimelea calcicola"
34	"Leaves alternate, often crowded, glabrous; involucral bracts c. 40"	"Pimelea graniticola"
34	"Leaves opposite or, if alternate, then usually hairy; involucral bracts 8–20"	35
35	"Ovary-portion of floral tube densely hairy throughout; leaves usually alternate"	36
35	"Floral tube glabrous at extreme base of ovary-portion, densely hairy above; leaves opposite"	37
36	"Hairs of floral tube not longer on ovary-portion or slightly longer and grading into somewhat shorter hairs on distal part of style-portion; leaves usually medium green to dark bluish green or deep green"	"Pimelea imbricata"
36	"Hairs of floral tube long on ovary-portion, suddenly becoming distinctly shorter on style-portion; leaves usually pale to medium grey-green"	"Pimelea subvillifera"
37	"Young stems hairy; bracts reflexed in fruit"	"Pimelea villifera"
37	"Stems glabrous. Bracts not reflexed in fruit"	"Pimelea erecta"
38	"Young stems hairy; leaves alternate or opposite, hairy when young"	39
38	"Stems glabrous; leaves opposite, glabrous"	41
39	"Longest hairs of floral tube 7–9 mm long; involucral bracts 6–12"	"Pimelea ammocharis"
39	"Hairs of floral tube up to 2 mm long; involucral bracts 4–6"	40
40	"Young leaves densely hairy on both surfaces; bracts densely hairy inside"	"Pimelea eyrei"
40	"Young leaves hairy on abaxial surface, adaxially glabrous or sparsely hairy; bracts glabrous inside"	"Pimelea longiflora"
41	"Anthers subsessile at throat of floral tube, strictly introrse, cells laterally exceeded by connective; stigma not or scarcely exserted from throat"	"Pimelea preissii"
41	"Anthers definitely exserted, the slits usually semi-lateral after dehiscence, cells laterally exceeding the connective; stigma distinctly exserted"	42
42	"Inner involucral bracts densely ciliate around apex"	43
42	"Involucral bracts not or scarcely ciliate"	45
43	"Longest cilia of bracts 0.5–1 mm long; longest hairs of floral tube concentrated towards base; ovary with a terminal tuft of hairs"	"Pimelea sulphurea"
43	"Longest cilia of bracts (1–)2–3.5 mm long; longest hairs of floral tube occurring throughout style-portion; ovary hairy but hairs not in a terminal tuft"	44
44	"Ovary-portion of floral tube with both long and short hairs throughout; inner involucral bracts glabrous or sometimes slightly hairy inside"	"Pimelea tinctoria"
44	"Ovary-portion of floral tube with short hairs, the long hairs (when present) confined to distal part; inner bracts usually hairy inside"	"Pimelea suaveolens"
45	"Ovary-portion of floral tube with dense deciduous hairs 3–4mm long"	"Pimelea drummondii"
45	"Ovary-portion of floral tube glabrous or with sparse to dense persistent hairs 1–3.5 mm long"	46
46	"Outside of flower with long hairs on the ovary-portion of floral tube, with a close dense covering of shorter hairs above; flower head erect or pendulous"	47
46	"Flowers either subglabrous to glabrous or with a relatively sparse indumentum of spreading hairs; flower head pendulous"	48
47	"Bracts not reddish or the colour not confined to base, slightly overlapping; hairs of flora tube all patent to antrorse"	"Pimelea angustifolia"
47	"Bracts reddish at the base outside, greatly overlapping; floral tube with minute retrorse hairs occurring for 2–4 mm above the circumscission point, the hairs above patent to antrorse"	"Pimelea floribunda"
48	"Flowers glabrous, pale green; ovary glabrous or hairs confined to basal half"	"Pimelea pendens"
48	"Flowers often with at least a few hairs on sepals, if glabrous then yellow; ovary hairy throughout"	49
49	"Sepals glabrous or with a few hairs along midrib outside; leaves obtuse or narrowly obtuse; flowers yellow"	"Pimelea aeruginosa"
49	"Sepals hairy outside, hairs not confined to midrib; leaves acute; flowers creamy green to pale yellow"	"Pimelea cracens"
50	"Flowers white or sometimes pale pink, with pinkish anthers; floral tube 9–11 mm long; stamen filaments longer than sepals"	"Pimelea concreta"
50	"Flowers deep red, with bright yellow anthers; floral tube 4–9 mm long; stamen filaments shorter than the sepals"	51
51	"Peduncle (6–)20–85 mm long; involucral bracts broadly ovate to depressed ovate, apiculate; sepals 2.5–5 mm long; anthers 1–1.4 mm long"	"Pimelea punicea"
51	"Peduncle 1–7 mm long; involucral bracts narrowly ovate or ovate, acute; sepals 1.5–2.5 mm long; anthers 0.4–0.8 mm long"	"Pimelea sanguinea"