Agoseris heterophylla

Agoseris heterophylla is a liguliferous species in the Asteraceae or sunflower family known by the common name annual agoseris or mountain dandelion. It is widespread in mostly drier regions of western North America from British Columbia to Baja California.[2][3][4][5][6]

Agoseris heterophylla
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Subfamily:
Cichorioideae
Tribe:
Cichorieae
Genus:
Agoseris
Species:
A. heterophylla
Binomial name
Agoseris heterophylla
Synonyms[1]

This is an annual herb producing a basal rosette of leaves. The oblanceolate leaves may be toothed, pinnatifid, or entire, and no larger than 15 cm long and 1.5 cm wide. Often there is no stem, or a short, rudimentary stem may develop, although the plant will produce several stem-like peduncles. Each solitary flower head contains one or two rows of sharp-pointed bracts, often with purplish hairs; and a corolla of yellow ray florets, but no disc florets. The fruit is an achene which can be highly variable but typically has a long beak and a terminal pappus of white bristles.[2][7]

Varieties[2]

References
  1. The Plant List Agoseris heterophylla (Nutt.) Greene
  2. Flora of North America, Agoseris heterophylla
  3. E-flora BC, electronic Atlas of the Flora of British Columbia
  4. Biota of North America Program 2014 county distribution map
  5. Calflora taxon report, University of California, Agoseris heterophylla (Nutt.) E. Greene Annual mountain dandelion, annual agoseris, mountain dandelion
  6. Shreve, F. & I. L. Wiggins. 1964. Vegetation and Flora of the Sonoran Desert. 2 vols. Stanford University Press, Stanford.
  7. Jepson Manual Treatment


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