What is "arctanthemum"

Arctanthemum is a genus of flowering plants in the daisy family.

1. Arctanthemum arcticum (L.) Tzvelev - Russian Far East
2. Arctanthemum integrifolium (Richardson) Tzvelev - coastal areas of Russia, Alaska, and Canada (incl Hudson Bay)
3. Arctanthemum yezoense (Maekawa) Tzvelev- Japan + Kuril Islands (called Yezo in Japanese, hence the epithet)