The other species in the genus Phryma:

Phryma leptostachya subsp.asiatica f. oblongifolia / Nagabahaedokusou ナガバハエドクソウ

Phryma leptostachya subsp.asiatica f. oblongifolia is a perennial found in groves. The stems grow to 30- 70 cm in height. Leaves attach lower portions in clusters; the phyllotaxis is opposite, long oval to long oblong, with coarse serrations on margins, bases cuneate, and backsides with obscure delicate veins. Branch tips emerge spikes; about 6cm long, white to light red labiate flowers bloom from the bottom toward upward in order - facing upward at first and sideways in flowering time. Corollas are tubular with two lips; upper lips are erect, cleft shallowly in three. Straight portions on both sides of the upper lips are short. Bloom time June-August.