Apr. 2, 2022

Addison's leather-flower, Clematis addisonii

Clematis addisonii was not appreciated as a unique species until 1890. It only occurs in an area called the ridge and valley province of southwestern Virginia. Found in four counties, most of the remaining plants are in Montgomery County. So how much trouble might it be in? Not too much. It has an effective pollination plan. The pistils are active before the anthers. This insures ample opportunity for cross pollination. But if that doesn't work, they can self-pollinate once the anthers open. It has been shown that self pollinated flowers produce as much seed as cross pollinated flowers. And besides that, Addison's is a tiger. It is doing well in captivity. Among others, the International Clematis Society likes to grow it. With their help, it has now ranged at least as far as Oregon and Ireland. In nature this species grows in a limited habitat of exposed shale. But the gardeners have found that it is not too hard to maintain in gardens, if you pay attention to shade, drainage and soil pH. This one was in a garden in Washtenaw County MI, 6/8/21. Buttercup family, Ranunculaceae.