Plural of funkia, which is another name for hostas, decorative plants with large leaves often grown in gardens for their attractive foliage.
From German botanist Heinrich Funk (1781-1839), whose name was commemorated in the plant genus. The Latin plural ending -ae was anglicized to -as.
Plant naming can be surprisingly political—many plants were named after botanists to immortalize them, but funkia eventually lost out to the newer scientific name 'hosta,' showing how botanical names can actually change over time!
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