Colors

Data mode

Account

Login
Sign up

Support FSUS...

We've finished our 2024 fundraiser. Many thanks to those who have given! It's not too late to support us (click here)...

Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Eupatorium, Key A: leaves pinnatifid or pinnate into linear or capillary segments (Dog-fennels)

Copy permalink to share | Check for keys that lead to this key

1 Leaf segments 2-10 mm wide; larger leaves with 5-11 segments
1 Leaf segments 0.1-5 mm wide; larger leaves with 13+ segments.
  2 Stem glabrous throughout, or short-pubescent in the lower portion only; inflorescence paniculate, the panicle branches recurved, the heads secundly arranged
  2 Stem pubescent throughout, generally conspicuously so; inflorescence paniculate, the branches not recurved, the heads not secund.
    3 Leaves bright green, glabrous, sparsely glandular-punctate, segments of the basal leaves 1-1.5 mm wide, segments of the upper leaves 0.2-0.5 mm wide
    3 Leaves grayish-green, pubescent, densely glandular-punctate, segments of the basal leaves 2-5 mm wide, segments of the upper leaves 1-2.5 mm wide