1	"Leaves of two kinds"	"Pitcairnia heterophylla"
1	"Leaves all similar"	2
2	"Petals white"	3
2	"Petals not white"	4
3	"Flowers on flower stalks to 1 cm long"	"Pitcairnia maidifolia"
3	"Flowers stalkless"	"Pitcairnia imbricata"
4	"Petals red"	5
4	"Petals not red"	7
5	"Flowers irregular"	"Pitcairnia flammea"
5	"Flowers regular"	6
6	"Leaves green on the underside"	"Pitcairnia staminea"
6	"Leaves reddish on the underside"	"Pitcairnia burle-marxii"
7	"Petals orange with yellow tips"	"Pitcairnia andreana"
7	"Petals yellow"	8
8	"Flowers on flower stalks 15–20 mm long"	"Pitcairnia xanthocalyx"
8	"Flowers stalkless"	"Pitcairnia atrorubens"