Erigeron species, 1753

Cerros-Tlatilpa, Rosa, Miguel-Vázquez, Mónica I., Caspeta-Mandujano, Juan M., Méndez-Cano, Rafael & Guerrero, Jose A., 2023, Erigeron morelensis (Asteraceae): a rediscovery after more than 120 years of a microendemic and threatened species in central Mexico, Phytotaxa 587 (3), pp. 211-217 : 215

publication ID	https://doi.org/10.11646/phytotaxa.587.3.1
DOI	https://doi.org/10.5281/zenodo.7752902
persistent identifier	https://treatment.plazi.org/id/DA696C1B-FFB7-1E43-FF3A-FB2AFAF9FA6E
treatment provided by	Plazi (2023-03-17 10:34:04, last updated 2024-11-29 17:51:54)
scientific name	Erigeron species
status

Treatment

Key to Erigeron species View in CoL View at ENA from E. sect. Erigeridium (based on Nesom 2008)

1. Stems branched, corymbiform, (1–)4–20(–25) capitula; plants distributed in SE US.......................................................... E. vernus View in CoL

- Stems not branched, monocephalous; plants distributed in Mexico..................................................................................................2

2. Involucre densely white-villous; phyllaries with glandular trichomes........................................................................ E. hintoniorum View in CoL

- Involucre sparsely white-villous; phyllaries sparsely pubescent without glandular trichomes .........................................................3

3. Stolons present; phyllaries lanceolate, apex acute to acuminate; ray florets 60–90 ...................................................... E. morelensis View in CoL

- Stolons absent; phyllaries linear-lanceolate to elliptic-lanceolate, apex acuminate; ray florets 70–135 ...........................................4

4. Leaves spatulate-oblong, obtuse; phyllaries linear-lanceolate; ray florets 80–90............................................................... E. palmeri View in CoL

- Leaves narrowly to broadly oblanceolate to spatulate; phyllaries lanceolate to elliptic-lanceolate; ray florets 70–135 ...... E. wellsii View in CoL