1	"Leaves broadly elliptic to obovate, sometimes cordate at base, sparsely long-ciliate; branchlets pilose"	"Boronia crenulata subsp. pubescens"
1	"Leaves linear to broadly obovate, narrowed at base, eciliate; branchlets glabrous or puberulous"	2
2	"Petals subterminally apiculate, usually prominently so; sepals acuminate or obtuse with small subterminal acumen, prominently ciliolate"	"Boronia crenulata subsp. crenulata"
2	"Petals either not apiculate or only minutely so; sepals obtuse or acute, glabrous or minutely ciliolate"	3
3	"Sepals ovate to triangular, 1.5–2 mm long, obtuse to acute, glabrous or only minutely ciliolate"	"Boronia crenulata subsp. viminea"
3	"Sepals broadly ovate, c. 2 mm long, obtuse or rounded at apex, minutely subterminally apiculate, ciliolate"	"Boronia crenulata subsp. obtusa"