compass s plant 指向植物
同义词： prairie bird's-foot trefoil prairie lotus prairie trefoil Lotus americanus
同义词： compass flower
以上来源于: WordNet
N a tall plant, Silphium laciniatum, of central North America, that has yellow flowers and lower leaves that tend to align themselves at right angles to the strongest light, esp in a north-south plane: family Asteraceae (composites) 松香草; 产于中北美洲，有黄色的花，其叶长得较低以向最强的光线以南北水平面转向 (Also called rosinweed)
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