1	"Stamens 8; fruit of 1–4 follicles, these each with stylar beak 0.5–1.5 mm long; leaves trifoliolate and/or simple"	"Melicope broadbentiana"
1	"Stamens 4; fruit of 1–4 follicles or a 4-loculed capsule, not beaked; leaves trifoliolate or mostly so"	2
2	"Sepals connate in proximal 1/2–3/4; fruit a capsule 8–12 mm long"	3
2	"Sepals connate basally; fruit of 1–4 follicles, or, if a capsule (as in M. rubra), then 20–30 mm long"	4
3	"Petals 5–6 mm long; carpels of capsule divaricate after dehiscence"	"Melicope peninsularis"
3	"Petals c. 3.5 mm long; carpels of capsule ascending after dehiscence"	"Melicope fellii"
4	"Petals adaxially longitudinally 3-ridged; raphe of seeds (best seen by removing pellicle) sinuous or contorted, especially in chalazal region"	"Melicope elleryana"
4	"Petals adaxially plane or longitudinally 1-ridged; raphe of seeds ±straight or gently curved"	5
5	"Inflorescences infrafoliar or mostly so"	6
5	"Inflorescences axillary or mostly so"	8
6	"Terminal leaflet of trifoliolate leaves sessile, 10–30 cm long, 5–12 cm wide; endocarp glabrous"	"Melicope bonwickii"
6	"Terminal leaflet of trifoliolate leaves often petiolulate, with lamina 5–15 cm long, 1.5–4.5 cm wide; endocarp usually with indumentum"	7
7	"Petals white, (2.5–) 3.5–5 mm long; fruit of 1–4 follicles 4–5 mm long"	"Melicope micrococca"
7	"Petals pink, 5–6 mm long; fruit a capsule 20–30 cm long"	"Melicope rubra"
8	"Trichomes simple, fasciculate, and stellate"	"Melicope xanthoxyloides"
8	"Trichomes simple"	9
9	"Flowers bisexual, male, or female; sepals ovate-triangular; functional style 0.6–1.5 mm long; follicles 5–7 mm long; endocarp glabrous"	"Melicope vitiflora"
9	"Flowers bisexual; sepals suborbicular or ovate; style 1.5–6.5 mm long; follicles 3.5–6 mm long; endocarp with at least sparse indumentum (or rarely glabrous in M. micrococca)"	10
10	"Terminal leaflet of trifoliolate leaves with lamina 10–17.5 cm long, 4–8 cm wide; staminal filaments, disc, and gynoecium glabrous; follicles c. 6 mm long"	"Melicope jonesii"
10	"Terminal leaflet of trifoliolate leaves with lamina 3.7–12.5 cm long, 1.2–4.5 cm wide; staminal filaments, disc, or gynoecium with indumentum; follicles 3.5–5 mm long"	11
11	"Petals glabrous, c. 2 mm long; follicles 3.5–4 mm long"	"Melicope affinis"
11	"Petals adaxially sparsely pilose or villous in proximal 1/3–1/2, (2.5–) 3–5 mm long; follicles 4–5 mm long"	12
12	"Terminal leaflet of trifoliolate leaves with lamina obovate or elliptic-obovate or narrowly so (in occasional leaves elliptic or narrowly so), rounded or obtuse to acuminate; gynoecium with indumentum; petals usually persistent or subpersistent in fruit"	"Melicope micrococca"
12	"Terminal leaflet of trifoliolate leaves with lamina elliptic or narrowly so, acuminate; gynoecium glabrous; petals deciduous in fruit"	"Melicope hayesii"