european swallow-wort - vincetoxicum rossicum

america angiosperms apocynaceae bane black bloom blooming blossom botany canada canadian conservation creek cynanchum dog dogbane dogstrangling environment environmental european family flora floral flowers gentianales horizontal horticulture invasive living natural nature north ontario organism outdoors outside pale park petal plants pretty purple rossicum species swallowwort taylor toronto urban vine wild wildflowers