1	Plants with basal rosette leaves	2
–	Plants without basal rosette leaves	5
2	Rosette leaves 0.4–0.8 cm wide; capsule subglobose; locule one seeded	Murdannia saddlepeakensis
–	Rosette leaves (0.5–) 0.8–1.5 cm wide; capsule ovoid to ellipsoid; locule two seeded	3
3	Flowering shoots terminal in the rosette; seeds ovoid to ellipsoid, 2.5–4 ×2–2.5 mm, hilum linear	Murdannia gigantea
–	Flowering shoots lateral in the rosette; seeds ovoid to obovoid, 1.6–2 × 1.5 mm, hilum linear to oblong	4
4	Pedicels 3–5 mm long; seeds 1.5–2 mm long; flowers 12–15 mm wide, opening after noon	Murdannia simplex
–	Pedicels 2–3 mm long; seeds 1.4–1.8 mm long; flowers 9–12 mm wide, fading by noon	Murdannia loriformis
5	Leaves subtending inflorescence bract-like; capsule globose; locule one seeded	Murdannia vaginata
–	Leaves not subtending inflorescence bract-like; capsule ovoid to obovoid or elliptic; locule more than 2 seeded	6
6	Leaves linear-lanceolate to linear-oblong; seeds 2 per locule	Murdannia nudiflora
–	Leaves lanceolate to ovate; seeds 3–7 per locule	Murdannia spirata