[医]heterothallism ;
Either of two eastern North American herbs heterotheca subaxillaris or Pluchea camphorata, of the composite family, having numerous small flower heads.
樟脑草北美东部两种菊科草本植物腋下异宗菊或樟脑阔苞菊之一,长有许多小花苞。
When heterothallism is purely physiological, morphologically identical strains exist ( often designated plus and minus strains ).
当异宗配合纯粹是生理上时, 存在形态上相同的菌系 ( 经常用+—号表示 ).
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