1	"Large plants with 12–150 leaves in the crown; veins visible but thin and not or scarcely raised on the lower surface when dry; mucilage canals present in pinnae; lower pinnae reduced to spines (not reduced in M. mountperriensis or M. longispina ) (sect. Macrozamia)"	2
1	"Small plants with 1–15 leaves in the crown (rarely up to 40 in M. lucida ); veins thick and prominent on lower surface, especially when dry; mucilage canals not present in pinnae; lower pinnae not reduced to spines (sect. Parazamia)"	16
2	"Pinnae amphistomatic"	3
2	"Pinnae hypostomatic"	8
3	"Leaves with numerous spinose pinnae gradually reducing in size to the leaf base and no clear petiole"	4
3	"Leaves with few spinose pinnae and a distinct clear petiole"	5
4	"Juvenile leaves becoming weakly amphistomatic from about the fifth leaf; adult leaves dull or semi-glossy, keeled (opposing pinnae arranged at less than 150°)"	"Macrozamia moorei"
4	"Juvenile leaves remaining hypostomatic beyond the twentieth leaf; adult leaves glossy, flat"	"Macrozamia johnsonii"
5	"Mature leaves blue, glaucous"	"Macrozamia macdonnellii"
5	"Mature leaves green or grey, not glaucous"	6
6	"Adult leaves flat or slightly keeled; pinnae with a broad white to orange basal gland on both sides; male cones 29–41 cm long; female cones 15–35 cm long"	"Macrozamia riedlei"
6	"Adult leaves moderately keeled; pinnae with a reduced basal gland, usually evident only on the undersurface; male cones 35–62 cm long; female cones 35–50 cm long"	7
7	"Pinnae 13–18 mm wide; upper male sporophylls with spines less than 25 mm long; upper female sporophylls with spines less than 4 cm long"	"Macrozamia dyeri"
7	"Pinnae 8–14 mm wide; upper male sporophylls with spines more than 50 mm long; upper female sporophylls with spines more than 5 cm long"	"Macrozamia fraseri"
8	"At least some pinnae dichotomously divided"	"Macrozamia diplomera"
8	"Pinnae not dichotomously divided"	9
9	"Pinnae thin, glossy above, closely spaced; spines of female sporophylls slender, 2–5 mm wide at base"	10
9	"Pinnae thick, dull, well-separated; spines of female sporophylls broad, 5–12 mm wide at base"	14
10	"Lower 8 or more pinnae reduced to spines"	11
10	"Less than 6 lower pinnae reduced"	12
11	"Upper female sporophylls with reduced spines, less than 15 mm long"	"Macrozamia miquelii"
11	"Upper female sporophylls with spines more than 25 mm long"	"Macrozamia cardiacensis"
12	"Some reduced pinnae present"	"Macrozamia douglasii"
12	"Lowermost pinnae full-sized"	13
13	"Median pinnae 6.5–9 mm wide"	"Macrozamia mountperriensis"
13	"Median pinnae 4.5–6 mm wide"	"Macrozamia longispina"
14	"Seeds less than 30 mm long"	"Macrozamia reducta"
14	"Seeds more than 30 mm long"	15
15	"Petiole spine-free for at least 15 cm"	"Macrozamia communis"
15	"Petiole spinescent almost to base"	"Macrozamia montana"
16	"Rachis not or moderately spirally twisted, if more than 360° then petiole 20–40 cm long or pinnae divided"	17
16	"Rachis strongly spirally twisted, if less than 360° then pinnae entire or petiole 5–15 cm long"	28
17	"Pinnae simple"	18
17	"Pinnae dichotomously divided one or more times"	24
18	"Broadest pinnae 12–20 mm wide, 15–18-veined; petiole 13–18 mm wide at lowest pinnae"	"Macrozamia platyrhachis"
18	"Broadest pinnae 3–14 mm wide, 5–11-veined; petiole 3–10 mm wide at lowest pinnae"	19
19	"Pinnae hypostomatic"	20
19	"Pinnae amphistomatic"	23
20	"Pinnae secund; petiole concave above"	"Macrozamia secunda"
20	"Pinnae spreading; petiole round or flat above"	21
21	"Pinnae glossy, whitish at base"	"Macrozamia lucida"
21	"Pinnae dull to semi-glossy, pinkish to red or orange at base"	22
22	"Leaves 35–100 cm long; pinnae 5–9 mm wide, not spinescent"	"Macrozamia spiralis"
22	"Leaves 90–150 cm long; pinnae 9–14 mm wide, spinescent"	"Macrozamia elegans"
23	"Leaves and cones green"	"Macrozamia polymorpha"
23	"Leaves and cones glaucous"	"Macrozamia glaucophylla"
24	"Pinnae hypostomatic"	"Macrozamia stenomera"
24	"Pinnae amphistomatic"	25
25	"Leaves blue"	"Macrozamia glaucophylla"
25	"Leaves green"	26
26	"Pinnae distinctly discolorous; leaves 35–65 cm long"	"Macrozamia humilis"
26	"Pinnae concolorous or weakly discolorous; longest leaves more than 65 cm long"	27
27	"Pinnae more than 5 mm wide"	"Macrozamia polymorpha"
27	"Pinnae less than 5 mm wide"	"Macrozamia heteromera"
28	"Pinnae 1–5 mm wide"	29
28	"Pinnae 4 mm wide or wider"	31
29	"Pinnae 1–3 mm wide, arising at about 30° to rachis; new growth bronze"	"Macrozamia parcifolia"
29	"Pinnae 2–5 mm wide, arising at 45° or more to rachis; new growth green"	30
30	"Petioles strongly flattened (more than 2 times wider than thick); pinnae lax, drooping in lower half"	"Macrozamia pauli-guilielmi"
30	"Petioles not as strongly flattened (less than 2 times wider than thick); pinnae stiff, drooping only in upper third"	"Macrozamia crassifolia"
31	"Broadest pinnae less than 10 mm wide, usually with a single apical tooth"	32
31	"Broadest pinnae more than 10 mm wide, 2–7-toothed apically"	39
32	"Pinnae green beneath"	33
32	"Pinnae grey or glaucous beneath, most noticeably when in new growth"	36
33	"Petiole ±terete"	"Macrozamia flexuosa"
33	"Petiole strongly flattened"	34
34	"Pinnae flat or convex above"	"Macrozamia viridis"
34	"Pinnae concave above"	35
35	"Pinnae crowded, stiffly erect, 7–21 cm long, 3–6 mm wide"	"Macrozamia conferta"
35	"Pinnae well-spaced, lax, 20–60 cm long, 5–9 mm wide"	"Macrozamia fearnsidei"
36	"Petiole ±terete"	"Macrozamia concinna"
36	"Petiole strongly flattened"	37
37	"Pinnae glossy above, lax"	"Macrozamia cranei"
37	"Pinnae dull to semi-glossy above, ±erect"	38
38	"Leaves more than 70 cm long; longest apical spines on microsporophylls more than 1 cm long"	"Macrozamia plurinervia"
38	"Leaves 40–75 cm long; longest apical spines on microsporophylls 0–5 mm long"	"Macrozamia occidua"
39	"Leaves dull to semi-glossy"	"Macrozamia lomandroides"
39	"Leaves highly glossy"	40
40	"Petiole terete (about as broad as thick), long (more than 25% of total leaf)"	"Macrozamia fawcettii"
40	"Petiole flattened (much broader than thick), short (less then 25% of total leaf)"	"Macrozamia viridis"