1	Vines	"Psychotria coelospermum"
1	Shrubs	2
2	"Fruit white, cream or yellow"	3
2	"Fruit orange, red or black"	17
3	"Fruit conspicuously hairy"	4
3	"Fruit glabrous or sparse minute hairs visible with a lens"	6
4	"Fruit cream or yellow"	"Psychotria loniceroides"
4	"Fruit white"	5
5	"Leaves hairy on both sides; stipules forked"	"Psychotria sp. (Pajinka W.Cooper+ WWC1435)"
5	"Leaves glabrous except for domatia; stipules not forked"	"Psychotria sp. (Shute Harbour L.J.Webb+ 7916)"
6	"Fruit warty"	"Psychotria sp. (Mt Lewis V.K.Moriarty 2445)"
6	"Fruit smooth"	7
7	"Stipule apex forked"	8
7	"Stipule apex rounded or pointed but not forked"	12
8	"Stipules 5-20 mm long"	9
8	"Stipules 2-4 mm long"	11
9	"Inflorescence stems glabrous"	"Psychotria submontana"
9	"Inflorescence stems hairy"	10
10	"Leaf underside glabrous"	"Psychotria sp. (Daintree NP P.I.Forster+ PIF21974)"
10	"Leaf underside hairy along midrib"	"Psychotria sp. (Danbulla S.T.Blake 15262)"
11	"Lateral veins on leaves scarcely visible"	"Psychotria fitzalanii"
11	"Lateral veins on leaves conspicuous"	"Psychotria poliostemma"
12	"Petioles absent or up to 2 mm long"	"Psychotria daphnoides var. angustifolia"
12	"Petioles 2-25 mm long"	13
13	"Leaves thick, 120-350 mm long; petioles 10-25 mm long"	"Psychotria sp. (Utchee Creek H.Flecker NQNC5313)"
13	"Leaves not thick, 10-180 mm long; petioles 2-13 mm long"	14
14	"Lateral veins indistinct"	"Psychotria dallachiana"
14	"Lateral veins distinct"	15
15	"New twigs minutely hairy"	"Psychotria daphnoides"
15	"New twigs glabrous"	16
16	"Inflorescence terminal; grows north from Innisfail"	"Psychotria submontana"
16	"Inflorescence axillary or rarely pseudo-terminal; grows south from Cape Gloucester"	"Psychotria sp. (Shute Harbour L.J.Webb+ 7916)"
17	"Stipules about 8 mm long, apex forked"	"Psychotria nematopoda"
17	"Stipules 1-3 mm long, apex not forked"	"Psychotria nesophila"