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 ).
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。
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