Please try our next iteration of the Michigan Flora Online here. Beginning on February 1, 2023, michiganflora.net will point to this new site.

The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.

Several species of Clematis are cultivated, and may occasionally escape. Among those known from adjacent states and Ontario are C. orientalis, with yellow flowers; C. recta, with an erect, non-climbing habit; C. vitalba, similar to C. terniflora in having ± entire leaflets but with perianth segments densely pubescent on the upper surface; and C. viticella, with blue to violet flowers.

1. Perianth pink-purple, the segments ca. 3–4.5 cm long; flowers solitary on elongate peduncles.

C. occidentalis

1. Perianth white, the segments ca. 0.7–2 cm long; flowers in small to large inflorescences.

2. Leaflets coarsely toothed; flowers unisexual; perianth segments finely hairy on the upper surface.

C. virginiana

2. Leaflets entire; at least some flowers bisexual; perianth segments glabrous on the upper surface.

C. terniflora