Group 1 - The article discusses various plants associated with the term "horse," highlighting their names and characteristics [4][5][6][7][8] - The naming of plants often draws parallels between animal body structures and plant forms, exemplified by "horse tooth" (马齿苋) and "horse tail" (马尾松) [4][5] - The article notes that some plant names, like "horse potato" (马铃薯), derive from horse-related equipment, which is less common in other zodiac animals [6][7] Group 2 - Certain plants contain the word "horse" but do not directly relate to horse anatomy or equipment, such as "horse grass" (马唐) and "horse orchid" (马兰) [8] - The "horse sage" (马先蒿) is highlighted as a significant genus with a high frequency of the term "horse" in plant names, particularly in the Himalayas and Hengduan Mountains [8] - The article emphasizes the cultural and linguistic significance of the term "horse" in plant nomenclature, reflecting human observation of nature [8]