Identification key of related species

1. Corm tunics papery or coriaceous; perigone purple or mauve-purple; capsule ellipsoid ..................................................................2

1. Corm tunics membranous parallel or reticulate fibrous, perigone lilac to violet purple, magenta-pink or rose pink, capsule obovate, oblong-obovate or depressed elliptic..................................................................................................................................................3

2. Tunics of corm papery; stem (27–) 30–40 cm long; leaf lamina 2.5–4(–7) mm wide; style branches unequal, 1.8–2.5 mm long ...... ........................................................................................................................................................................................ G. anatolicus

2. Tunics of corm coriaceous; stem up to 20 cm long; leaf lamina 4–7 mm wide, style branches ± equal, 3–4 mm long...................... ............................................................................................................................................................................................ G. humilis

3. Corm tunics membranous, parallel fibrous; spike distichous; perigone magenta-pink; capsule obovate..................... G. alanyensis

3. Corm tunics reticulate-fibrous; spike secund; perigone lilac to violet-purple or rose pink; capsule depressed elliptic or oblongobovate ...............................................................................................................................................................................................4

4. Perigone lilac to violet purple, with tube straight; capsule depressed elliptic; seeds tetraquetrous, angulose..................................... ...................................................................................................................................................................................... G. micranthus

4. Perigone rose-pink, with tube narrowly infundibular; capsule oblong-obovate; seeds subglobose................................ G. triphyllus