1	"Floral disc pubescent or papillose"	2
1	"Floral disc smooth and glabrous"	3
2	"Floral disc densely papillose; stems and leaves simple-hairy"	"Trymalium angustifolium"
2	"Floral disc stellate-hairy; stems and leaves stellate-hairy"	"Trymalium densiflorum"
3	"Ovary roof and fruit (above the torus) glabrous"	4
3	"Ovary roof and fruit with stellate and/or simple hairs"	6
4	"Leaves less than 5 mm long; plants often spinescent or intricately branched"	"Trymalium elachophyllum"
4	"Leaves more than 5 mm long; plants never spinescent or intricate"	5
5	"Leaves narrowly obovate to linear, flat to revolute; hypanthium often pubescent"	"Trymalium ledifolium"
5	"Leaves ovate to broadly ovate, flat or folded; hypanthium +/-glabrous"	"Trymalium urceolare"
6	"Inflorescences few-flowered; leaves usually less than 20 mm long; stipules persistent; plants often +/-intricately branched"	7
6	"Inflorescences many-flowered; leaves usually more than 20 mm long; stipules caducous; plants never intricate"	9
7	"Leaves +/-linear , revolute with only the broad midrib visible below"	"Trymalium daphnifolium"
7	"Leaves obovate, flat or slightly recurved, lamina visible below"	8
8	"Leaves narrowly obovate to obovate, usually less than 4 mm wide, pubescent above; sepals densely pubescent like the hypanthium tube"	"Trymalium myrtillus"
8	"Leaves obovate to broadly obovate, usually more than 5 mm wide, glabrous above; sepals sparsely pubescent, hypanthium tube densely so"	"Trymalium wayi"
9	"Young leaves quite glabrous adaxially, except sometimes along the midnerve"	"Trymalium spatulatum"
9	"Young leaves, and often adult leaves as well, adaxially pubescent"	10
10	"Mature leaves closely and densely grey-pubescent adaxially; carpels 3"	"Trymalium litorale"
10	"Mature leaves glabrous or sparsely pubescent adaxially; carpels 2–3"	"Trymalium odoratissimum"