1	"Leaves in a basal rosette only; tubers absent"	2
1	"Leaves cauline, basal rosette present or absent at flowering time; plant with a vertical rhizome arising from a globose tuber"	7
2	"Leaf lamina deeply divided into two or occasionally more, linear lobes"	"D. binata"
2	"Leaf lamina entire"	3
3	"Stipules present, conspicuous, scarious"	4
3	"Stipules absent or small and fused to the petiole"	5
4	"Flowers solitary, minute, on slender scapes; leaf lamina orbicular"	"D. pygmaea"
4	"Flowers few to many on a narrow secund raceme; leaf lamina spathulate"	"D. spatulata"
5	"Leaves orbicular, < 2 cm long; peduncle glandular-pubescent"	"D. glanduligera"
5	"Leaves linear-oblong; peduncle glabrous"	6
6	"Number of glandular leaves (3–)4–6, 20–70 mm long; outer, non-glandular leaves reduced or absent"	"D. arcturi"
6	"Number of glandular leaves 1–2, 60–100(–200) mm long; outer, non-glandular leaves present, spreading"	"D. murfetii"
7	"Stem leaves orbicular, peltate, lacking angular lobes; stems trailing, scrambling or climbing"	"D. macrantha"
7	"Stem leaves lunate, the margins extended as 2 angular lobes; stems erect"	8
8	"Sepals glabrous"	"D. auriculata"
8	"Sepals hirsute"	9
9	"Stems very slender, unbranched, frequently leafless in the upper half; basal rosette leaves red; seeds narrow-turbinate, slightly arcuate"	"D. peltata"
9	"Stems branched or unbranched, leafy to the inflorescences; basal rosette leaves yellow to green; seeds ovoid to ampulliform or cylindrical"	10
10	"Plant up to 10 cm high with a distinctly yellow-green colour; tubers white; stems often several or if solitary then branched from near the base; inflorescences from lower and upper nodes; sepal indumentum sparse, < 0.6 mm long; petals white, drying white, 4–4.5 mm long"	"D. hookeri"
10	"Plant (5–)8–22(–30+) cm high with a pale olive-green to dark red colour; tubers pink or red; stems usually solitary, or branched in the upper half; inflorescence from the upper nodes only; sepal indumentum dense, > 0.8 mm long, often > 1 mm; petals white or pink, drying pink, 5–8 mm long"	"D. gunniana"