Species in the genus Platanthera:

Platanthera mandarinorum var. brachycentron / Yamasagisou ヤマサギソウ

Platanthera mandarinorum var. brachycentron is a perennial orchid inhabiting a sunny grassland, erecting upward, 20-40cm tall. The leaf in the lowest, narrow oblong, or linear-oblong shape is incomparably more prominent than the others, measuring 5-11cm long. Flowers come in light yellow-green in a raceme, the spur lengthening backward. At times, they may, in shape, associate with Platanthera nipponica. Bloom time: May-July.