1	"Sepals present and at least partially free"	2
1	"Sepals absent or completely united into a cup"	4
2	"Flowers bisexual; staminodes present; plants not spiny"	Casearia
2	"Flowers unisexual, plants dioecious; staminodes not present; plants usually spiny"	3
3	"Styles 2 or more; ovary with 2 or more cells; leaves pubescent, oval to ovate"	Flacourtia
3	"Styles 1; ovary 1-celled; leaves glabrous, lanceolate"	"Xylosma {Xylosma longifolium}"
4	"Buds with 1 outer scale; floral bracts entire; calyx absent"	Salix
4	"Buds with many outer  scales; floral bracts lobed, dentate, laciniate, or fimbriate; sepals fused into a cupular perianth"	Populus