Bitter Daisy, Bitter Fleabane, Fleabane Daisy
Erigeron acris
Synonym: Trimorpha acris
![Flower head of Bitter Daisy, Bitter Fleabane, Fleabane Daisy: Erigeron acris (Synonym: Trimorpha acris)](politus/erigeronacris2.jpg)
The photo above shows a close-up of the flower
head of bitter fleabane as seen from directly above. Note the numerous narrow
ray flowers which are very short and barely extend past the involucral bracts.
![Involucral bracts of Bitter Daisy, Bitter Fleabane, Fleabane Daisy: Erigeron acris (Synonym: Trimorpha acris)](politus/erigeronacris.jpg)
The photo above shows a close-up of the flower head of bitter
fleabane as seen from the side. Note the numerous narrow ray flowers as well
as the long, narrow involucral bracts.
![Inflorescence of Bitter Daisy, Bitter Fleabane, Fleabane Daisy: Erigeron acris (Synonym: Trimorpha acris)](politus/erigeronacris1.jpg)
The photo above shows a close-up of part of the inflorescence
of bitter fleabane. This subspecies of bitter fleabane (ssp. politus)
has multiple flower heads which make up the inflorescence. Subspecies acris
var. debilis typically has a single flower head atop its stem.
![Basal leaf of Bitter Daisy, Bitter Fleabane, Fleabane Daisy: Erigeron acris (Synonym: Trimorpha acris)s](politus/erigeronacrislf.jpg)
The photo above shows a close-up of a basal
leaf of bitter fleabane as seen from directly above. Note the spreading hairs,
especially along the margin of the petiole.
![Bitter Daisy, Bitter Fleabane, Fleabane Daisy: Erigeron acris (Synonym: Trimorpha acris)](politus/erigeronacris3.jpg)
The photo above shows the general form of bitter fleabane. Note
the numerous flower heads atop the stems which is a key identifying characteristic
for subspecies politus.
Paul Slichter