Erigeron piscaticus

Erigeron piscaticus is a rare species of flowering plant in the aster family known by the common name Fish Creek fleabane.[1] It is endemic to Arizona in the United States, where it is known from three locations in Maricopa and Graham Counties.[2][3]

Erigeron piscaticus

Critically Imperiled  (NatureServe)
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Astereae
Genus:
Erigeron
Species:
E. piscaticus
Binomial name
Erigeron piscaticus

Erigeron piscaticus is an annual herb producing hairy, glandular stems up to 40 centimeters (16 inches) tall from a taproot. The oval leaves are 1 or 2 centimeters (0.4-0.8 inches) long and mostly smooth-edged. The flower heads are produced 1-4 per stem, each lined with hairy, glandular phyllaries. The heads contain 45–58 white ray florets each about 3 millimeters (0.12 inches) long.[1][4]

This plant grows on river terraces and washes. The "Fish Creek" part of the common name refers to Fish Creek Canyon in Maricopa County, where the type specimen was collected.[2][1][4]

References
  1. Flora of North America. Erigeron piscaticus G. L. Nesom, Phytologia. 67: 304. 1989. Fish Creek fleabane
  2. Erigeron piscaticus. The Nature Conservancy.
  3. Biota of North America Program 2014 county distribution map
  4. Nesom, Guy L. 1989. Phytologia 67(4): 304–306
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