1	"Leaves pinnate"	2
1	"Leaves palmate or costapalmate"	3
2	"Petioles armed with spines"	Phoenix
2	"Petioles unarmed"	"Cocos {Cocos nucifera}"
3	"Trunks simple, tall; petiole bases not split; petioles triangular in cross-section"	"Livistona {Livistona carinensis}"
3	"Trunks dichotomously branched, short to tall or underground; petioles bases with a conspicuous central trinagular cleft; petioles semi-circular in cross-section"	Hyphaene