Erigeron aequifolius
Hall's daisy
(c) Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay · licence
Family: Asteraceae · Type: Herb · Native
Conservation status: CNPS 1B.3
Erigeron aequifolius (Hall's daisy) is a native California herb in the Asteraceae family, recognized by features include habitat specificity to rock ledges/crevices and rays drying blue.
Hall's daisy is a rare (CNPS 1B.3) California native perennial found in southern Sierra Nevada Mountains on rock ledges and crevices at elevations of 1,500 to 2,100 meters. Flowering from July to August, this plant produces white to lavender daisy-like flowers 7 to 10 millimeters in diameter with rays that dry to a soft blue. Growing 10 to 20 centimeters tall with ascending to erect stems that are few-branched and covered in short, spreading hairs, it emerges from a woody, slender-branched base. Its narrow leaves are 6 to 20 millimeters long, elliptic to oblanceolate, evenly spaced along the stem, and lightly covered with soft, short hairs. The plant produces delicate white ray flowers that gracefully curl when dry, creating a subtle, intricate appearance.
Identification and appearance
Key characters: 37 sympatric species; diagnostic features include habitat specificity to rock ledges/crevices and rays drying blue
Habitat and range
Habitat: rock ledges, crevices
Elevation: 1500-2100 m
Bloom period
Erigeron aequifolius blooms Jul-Aug.
Conservation status
CNPS 1B.3
How to tell it apart
vs Bellis: Erigeron has double-layered pappus (outer scales + inner bristles); Bellis completely lacks pappus.; vs Symphyotrichum: Erigeron has double pappus (2 layers); Symphyotrichum has single layer of uniform bristles.; vs Corethrogyne: Erigeron has simple unbranched stems; Corethrogyne has branched stems.; vs Pseudognaphalium: Erigeron has flat button-like flower heads; Pseudognaphalium has woolly clustered heads without rays.; vs Artemisia: Erigeron has obvious ray petals around yellow disk; Artemisia lacks ray petals entirely.
Frequently asked questions
Is Erigeron aequifolius native to California?
Yes. Erigeron aequifolius is native to California (recorded as native).
When does Erigeron aequifolius bloom?
Erigeron aequifolius blooms Jul-Aug.
What plant family does Erigeron aequifolius belong to?
Erigeron aequifolius is in the Asteraceae family, genus Erigeron.
Is Erigeron aequifolius rare or endangered?
Erigeron aequifolius carries California Rare Plant Rank 1B.3, state rank S3.
What habitat does Erigeron aequifolius grow in?
Erigeron aequifolius grows in rock ledges, crevices.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CNPS Rare Plant Inventory · Index of California Plant Names · CalPhotos · CDFW CNDDB
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.