Orsolya Haarberg / Clematis (Clematis integrifolia) flowers, Danube-Drava National Park, Hungary, Spring

Paul Harcourt Davies / Alpine Clematis (Clematis alpina) in flower, in ancient pine and mixed woodland, Val di Vallesinella near Madonna di Campiglio, Brenta Dolomites, Italy, July

Paul Harcourt Davies / Alpine Clematis (Clematis alpina) in flower, in ancient pine and mixed woodland, Val di Vallesinella near Madonna di Campiglio, Brenta Dolomites, Italy, July

Rolf Nussbaumer / Blue mud dauber wasp (Chalybion californicum) adult in flight among Old man's beard (Clematis drummondii) flowers, Dinero, Lake Corpus Christi, South Texas, USA.

Lynn M Stone / Garden cultivated red clematis flowers (Clematis sp) in early evening light, Illinois, USA

Wild Wonders of Europe / Müller / Close up of Clematis seed heads, Pollino National Park, Basilicata, Italy, November 2008

Wild Wonders of Europe / Müller / Close up of Clematis seed heads, Pollino National Park, Basilicata, Italy, November 2008

Wild Wonders of Europe / Müller / Clematis seed heads, Pollino National Park, Basilicata, Italy, November 2008

Eric Baccega / Window with yellow clematis flowers, Guernsey, Channel Islands. May 2009.

Gary K. Smith / Garden Clematis on blue garden trellis, Somerset, UK

Doug Wechsler / Sweet Autumn Clematis {Clematis terniflora} invasive vine from Japan, Cape May, New Jersey, USA

Doug Wechsler / Sweet Autumn Clematis {Clematis terniflora} flowering beside road, invasive vine from Japan, Cape May, New Jersey, USA