Erigeron philadelphicus

From Puget Prairie Plants

Common name: Philadelphia fleabane, Philagelphia daisy or Fleabane daisy

Plant habit of Erigeron philadelphicus

Abbreviation Code (Codon): ERPH


  • Kingdom Plantae
  • Subkingdom Tracheobionta
  • Superdivision Spermatophyta
  • Division Magnoliophyta
  • Class Magnoliopsida
  • Order Asterales
  • Family Asteraceae
  • Genus Erigeron
  • Species E. philadelphicus


Erigeron philadelphicus is a Biennial or short-lived perennial, fibrous rooted, 2-7 dm. tall; herbage usually with long, spreading hairs. It has Basal leaves oblanceolate, toothed or lobed to sometimes entire, up to 15 cm. long and 3 cm. wide; cauline leaves becoming sessile, mostly ample and clasping. Flower heads 1-many; involucre 4-6 mm. high; rays pistillate, 150-400, 0.2-0.6 mm. wide, 5-10 mm. long, deep pink to white; disk corollas 2.5-3.2 mm. long, yellow; pappus of 20-30 fragile bristles.

Bloom Period

Erigeron philadelphicus blooms from May to July.

Erigeron philadelphicus Flowers in full bloom.


Found in most of the United States and southern Canada


Erigeron philadelphicus grows in moist, open forests at low to mid-elevations and it needs Fine and medium soil texture - light (sandy), medium (loamy) and heavy (clay) soils, requires well-drained soil and can grow in heavy clay soil to thrive.


An astringent tea made from the plant is a diaphoretic, diuretic and emmenagogue. It is used in the treatment of chronic diarrhea, gout, gravel, and epilepsy. The tea has also been used during menstruation, to relieve pain. A poultice of the plant is used to treat headaches and can also applied to sores directly. This powerful plant should not be taken by pregnant women since it can induce a miscarriage. A snuff made from the powdered florets is used to make a person with catarrh sneeze


Sow seed in spring in situ. The seed usually germinates within four weeks. Plants succeed in maritime gardens. Plants grow in calcareous and clay soils in the wild. Plants produce masses of seed and often self-sow freely when in a suitable position. Very few members of this genus will hybridize with other members of the genus. No cold stratification required.


Seed sample from: 2009

Average Measurement: 0.9 x 0.1 x 0.1

Measurement Range: L: 0.75 – 1.1, W: 0.1 - 0.2, D: no variation in sample set (all seeds measured 0.1 mm

Erigeron philadelphicus seed. Photo taken by Lisa Hintz.


Shape: Seed narrow at hilium end, broadening where pappus attaches.

Color: Hilium is white, slightly glossy and puckered. Seed is tan, with some darker brown along edges or as spotting on seed face.

Other Structures: Pappus of white bristly hairs are two to five times longer than seed body, and attach in a circle at apex opposite hilium.

Surface: Seed also covered in some sporadic short bristles.

Latitudinal Cross Section: elliptical ERPH lat.png

Longitudinal Cross Section: obovate ERPH long.png


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