Tennessee Smart Yards Native Plants

A comprehensive database of Tennessee native plants

Whiteflower Leafcup, Small-flowered Leafcup

Whiteflower Leafcup, Small-flowered Leafcup

Polymnia canadensis

Part to full shade, moderately wet to dry moisture level, loamy soil, prefers alkaline pH.  2-4 ft. height, blooms summer into fall, white flowers, may self-seed in optimum growing conditions.

Germination Code:  C(60)

Native Region:  Statewide except absent in Coastal Plain Province

A member of the Aster Family.  Woodland wildflower with striking large, deeply scalloped leaves and small flowerheads that are not very showy.   Not very well known by the public.  Native habitat is rich woods, usually rocky areas.

flower;sun/shade;wet;loam
flower;sun/shade;medium;loam
flower;sun/shade;dry;loam
flower;shade;wet;loam
flower;shade;medium;loam
flower;shade;dry;loam

One response to “Whiteflower Leafcup, Small-flowered Leafcup

  1. joystewart August 14, 2013 at 1:15 am

    This summer I visited the Ijams Nature Center in Knoxville. Walking through their woodland, I was amazed to see what looked like Small-flowered Leafcup nearly covering the woodland floor, especially solid in any areas where the sun could peek through. It looked to me like it might be so aggressive that a person should be careful about planting it. Since I had planted a few plants in my small woodland, the sight made me a bit anxious. So I contacted the naturalist at Ijams and asked. He says that the forest floor is covered with both Large-flowered Leafcup and Small-flowered Leafcup, and the only way to tell the difference is when they are in bloom. He did not seem particularly concerned about the plants being aggressive, saying that “they form a good dense understory of lushness and it just depends on your space and how much room you are willing to let them have.” I thought I would add this comment because it might help someone who is thinking of planting this species. In the meantime, I am going to keep a sharp eye on mine because, personally, I don’t want an entire forest floor of this stuff.

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