1	"Flowers radially symmetric, the lowermost petal neither spurred nor saccate; plants shrubs or small trees with rapidly deciduous stipules"	"Rinorea {Rinorea elliptica}"
1	"Flowers bilaterally symmetric, lowermost petal in each flower spurred or saccate"	2
2	"Lowermost petal in each flower sessile, not clawed; seeds smooth"	"Viola {Viola cinerea var. stocksii}"
2	"Lowermost petal in each flower distinctly clawed; seeds striate or pitted"	Hybanthus