1	"Plant not rhizomatous, usually with stilt roots"	2
1	"Plant rhizomatous, never with stilt roots"	8
2	"Leaf laminae reflexed (90°–140°), not overlapping"	"Calectasia pignattiana"
2	"Leaf laminae not reflexed (on mature branchlets) (0°–45°)"	3
3	"Leaf lamina densely pilose"	"Calectasia browneana"
3	"Leaf lamina glabrous (margins often scabrous)"	4
4	"Leaf lamina without mucro, apex obtuse to bluntly apiculate"	"Calectasia obtusa"
4	"Leaf lamina usually with a pungent mucro over 0.2 mm long"	5
5	"Leaf lamina 1.0–1.3 mm wide; staminal filaments 2.6–3.0 mm long; facultative stilting species"	"Calectasia cyanea"
5	"Leaf lamina 0.38–0.7 mm wide; staminal filaments 1.0–2.3 mm long; obligate stilting species"	6
6	"Perianth tube 9.9-10.1 long, lobes 10.2-12.2 mm long"	"Calectasia palustris"
6	"Perianth tube 5.7-7.3 mm long, lobes 6.9-9.5 mm long"	7
7	"Many-branched habit; leaves slender 0.38-0.53 mm wide, leaf apices always pungent; perianth tube 6.5-7.3 mm long, prominently ribbed, pilose in the lower half and with four lines of hairs continuing for the entire length; anthers 4.2-4.4 mm long"	"Calectasia elegans"
7	"Few- branched habit; leaves 0.5-0.6 mm wide; leaf apices obtuse to pungent; perianth tube 5.7-6.9, not or weakly ribbed, pilose in the lower half only; anthers 5.0-5.4 mm long"	"Calectasia gracilis"
8	"Leaf lamina hispid above (Kalbarri to Gillingarra)"	"Calectasia hispida"
8	"Leaf lamina glabrous above (margin often scabrous)"	9
9	"Anther apex caudate, base constricted with a short skirt (not turning red with age; perianth lobes 8.1–12.5 x 1.3–2.1 mm, thinly coriaceous)"	"Calectasia keigheryi"
9	"Anther apex obtuse to emarginate, base cordate"	10
10	"Bracts white, papery, lacking vestigial leaf lamina; perianth lobes blue, chartaceous, ageing white"	"Calectasia narragara"
10	"Bracts white, brown to purple, often with vestigial leaf lamina; perianth lobes blue ageing red or blue-red ageing pale blue-red"	11
11	"Rhizome short, spreading and ‘looping’; leaf blades 0.4-0.6 mm wide; perianth tube pilose in lower 1/5"	"Calectasia demarzii"
11	"Rhizome short, spreading but ‘non-looping’; leaf blades 0.7-1.3 mm wide; perianth tube pilose in lower 1/4 to full length"	12
12	"Perianth tube pilose in lower 1/4 with golden to silvery hairs; staminal filaments 4.6-5.2 mm"	"Calectasia jubilaea"
12	"Perianth tube variously pilose, hairs not golden to silvery; staminal filaments 2.7-4.2 mm"	13
13	"Stems robust, with many long lateral branches; rhizome short, compact; leaves thick, broad, 0.6–1.3 mm wide"	"Calectasia valida"
13	"Stems somewhat lax, slender; rhizome spreading; leaves thin, angular, 0.8-1.2 mm wide"	"Calectasia grandiflora"