A few are semiparasitic on the roots of angiosperms, especially grasses, such as eyebright (Euphrasia) and lousewort (Pedicularis).

 
  • 玄参科内少数种类半寄生于被子植物的根部,特别是在禾本科植物上,如小米草(Euphrasia)和马先蒿(马先蒿属)。
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