Phytometra viridaria, the small purple-barred, is a moth of the family Erebidae.

Forewing olive brownish; the costa at base, and an outer and terminal fascia deep rosy purple; the outer band varying in width; a pale line of ground colour between them; hindwing olive with a median and terminal darker band more or less tinged with purple; in ab.

fusca Tutt the purple tints are replaced by dark brown; —ab.

the ground colour is olive grey or fuscous instead of green; ab.

suffusa Tutt is a rare form, blackish fuscous with a still darker terminal border.