Photo: Jeffersonia diphylla.

Plants. Helsinki bot.g., (Kump.), Finland. Planted. 2004-09-17.
Jeffersonia diphylla (L.) Pers. Engl.: twinleaf, ground-squirrel pea, helmetpod, rheumatism-root, yellowroot. Deu.: Zwillingsblatt. Bot. syn.: Jeffersonia binata Bart., Jeffersonia lobata Nutt., Jeffersonia odorata Raf., Podophyllum diphyllum L.
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Photo: Jeffersonia diphylla.