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.

Click images to enlarge and show more photo credit.

Key to Chromolaena

Asteraceae

Chromolaena

Copy permalink to share

1 Leaf base cuneate; leaf blade lanceolate; petiole 0-1 (-3) mm long; [more widespread in our region, especially along the Gulf Coastal Plain]
1 Leaf base broadly cuneate, rounded, truncate, or subcordate; leaf blades (at least the larger) triangular; petiole 5-20 mm long; [FL peninsula and TX coastal areas].
  2 Leaf blades 1.5-4 cm long, 0.7-2.2 cm wide; involucres 5.5-7.5 (-8) mm tall; perennial herbs, 1.2.5 dm tall
  2 Leaf blades 3-10 cm long, 1-4 cm wide; involucres (7-) 8-10 mm tall; perennial herbs or suffrutescent, 8-25 dm tall