1	"Shrubs (sometimes prostrate) to small trees; stamens 4"	2
1	"Herbs or, if shrubby then stamens 2"	7
2	"Corolla white or violet, tube <6 mm long"	3
2	"Corolla variously coloured, rarely white, tube >8 mm long"	6
3	"Corolla rotate, caducous, lobes more or less equally cut into tube, fruit glabrous, succulent, white or coloured or more rarely dry, laterally compressed or conical"	4
3	"Corolla slightly to strongly zygomorphic, caducous or more rarely persistent, lobes equally or unequally cut into tube; fruit glabrous, variously hairy or lepidote dry or very rarely succulent"	5
4	"Dehisced anthers reniform"	Myoporum
4	"Dehisced anthers sagittate, the two portions not fully coalescing but joined by a narrow connective at apex"	Eremophila
5	"Corolla tube narrow cylindrical ca 1.5 mm broad, lobes forming a flattened limb oblique to or at right angles to the tube; vegetative parts extremely viscid, sickly sweetly smelling, corolla caducous; pollen sexine, reticulate"	"Glycocystis {Glycocystis beckeri}"
5	"Corolla tube dilating distally at least 3 mm broad, lobes spreading not forming a limb, upper lip pair fused for most of length, anthers exserted; corolla persistent pollen sexine punctitegate"	Diocirea
6	"Corolla urceolate, persistent and dropping with enclosed fruit; filaments twisted, sickle-shaped; dehisced anthers prominently lobed on lower side"	"Calamphoreus {Calamphoreus inflatus}"
6	"Corolla variable, rarely more or less urceolate, caducous; filaments straight or curved but not twisted; open anthers not lobed on lower side"	Eremophila
7	"Calyx not surrounding the flower; bracteoles absent; corolla with 4-lobed upper lip, the lower lip lacking"	8
7	"Calyx surrounding the flower, even when divided to base; bracteoles present or absent; corolla always lobed on lower side"	9
8	"Sepals 2, on either side of corolla"	Dischisma
8	"Sepals 1, on adaxial (upper) side of corolla"	"Hebenstretia {Hebenstretia dentata}"
9	"Sepals free for more than half their length"	10
9	"Sepals fused for more than half their length"	14
10	"Leaves opposite or whorled"	Scrophularia
10	"Leaves alternate, at least in upper parts"	11
11	"Corolla tiny, 2-5 mm long"	12
11	"Corolla showy, over 5 mm long"	13
12	"Corolla more or less campanulate, weakly zygomorphic. Fruit two 1-seeded nutlets. Subshrub. Inflorescences corymbs of numerous compact spikes"	Selago
12	"Corolla more or less bilabiate. Fruit a many-seeded capsule. Annual. Inflorescences terminal dense, broadly ovoid heads"	"Polycarena {Polycarena rariflora}"
13	"Corolla rotate, less than 1 cm long, with tube much shorter than 5 widely spreading lobes. Stamens 4, sometimes with a staminode, or five, 1-celled; adaxial (upper) 2 or 3 anthers reniform, abaxial (lower) 2 anthers decurrent along filament"	Verbascum
13	"Corolla bilabiate, over 3 cm long, with tube longer than lobes. Stamens 4, sometimes with staminode, with 2 divergent cells confluent at apex"	Maurandya
14	"Leaves opposite or whorled"	Euphrasia
14	"Leaves alternate, at least in upper parts"	15
15	"Calyx 5-toothed. Corolla salverform, the slender tube over twice length of calyx. Stamens: upper pair with small circular sterile anthers, lower pair with large oblong fertile anthers"	"Zaluzianskya {Zaluzianskya divaricata}"
15	"Calyx with 2 entire lips. Corolla more or less bilabiate, the tube less than twice length of calyx. Stamens 4 with identical anthers"	"Polycarena {Polycarena rariflora}"