Arisaema triphyllum
Jim McKenney (Sun, 27 Aug 2017 13:26:46 PDT)

Jane asked about viruses in Arisaema triphyllum.
I don't know about viruses, but both Arisaema triphyllum and Podophyllum peltatum are frequently infected with rusts of the genus Puccinia. I don't remember any cases of these rusts jumping to cognate exotic species - yet. Jim McKenneyMontgomery County Maryland, USA, USDA zone 7, where × Amarcrinum 

is still blooming freely. 

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