1	"Petals mauve; embryos with no (or very few) glands."	"Gossypium sturtianum"
1	"Petals cream or yellow; embryos with prominent glands."	2
2	"Fruit with no commercial, or obvious, cotton hairs; epicalyx segments linear or with a few teeth at apex; at least the lower leaves deeply lobed almost to base."	"Gossypium thurberi"
2	"Fruit with commercial and obvious cotton hairs; epicalyx segments usually laciniate or deeply incised; leaves entire or lobed to c. midway."	3
3	"Capsule 3–5-locular, ovoid to more or less globose; stipules 5–20 mm long; leaves 3–5-lobed, the central lobe usually 1–1.5 times as long as broad."	"Gossypium hirsutum"
3	"Capsule usually 3-locular, narrow-ovoid; stipules 1–5 cm long; leaves 3–7-lobed, the central lobe usually more than 1.5 times as long as broad"	"Gossypium barbadense"