Is Scutellaria or Catalpa know for its resemblance to miniature medieval helmets? 
Scutellaria: Scutellaria is a genus of flowering plants in the mint family, Lamiaceae. Scutellaria:  The common name alludes to the resemblance of the same structure to "miniature medieval helmets". Catalpa: Catalpa, commonly called catalpa or catawba, is a genus of flowering plants in the family Bignoniaceae, native to warm temperate and subtropical regions of North America, the Caribbean, and East Asia.
Scutellaria