Agoseris grandiflora

Agoseris grandiflora is a North American species of flowering plant in the daisy family known by the common names California dandelion, bigflower agoseris, and grassland agoseris.[2]

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

The plant is native to western North America from British Columbia to California to Utah, where it grows in many habitat types.[3][4]

Description

Agoseris grandiflora is a perennial herb producing a basal patch of leaves of various shapes reaching maximum lengths of 50 centimeters. There is usually no stem, but there is sometimes a rudimentary one.[2]

The upright part of the plant is actually the peduncle of the inflorescence, which can approach a meter in height. It is coated in soft white hairs.[2]

The flower head at the top is up to 4 centimeters wide and lined with reddish or purplish green phyllaries with curling tips. The head is ligulate, containing many yellow ray florets but no disc florets.[2]

The fruit is an achene which may be nearly 3 centimeters long, including a long beak and long white pappus.[2]

Varieties
  • Agoseris grandiflora var. grandiflora
  • Agoseris grandiflora var. leptophylla

References
  1. The Plant List Agoseris grandiflora (Nutt.) Greene
  2. Flora of North America, Agoseris grandiflora
  3. Biota of North America Program 2014 county distribution map
  4. Calflora taxon report, University of California, Agoseris grandiflora (Nutt.) E. Greene California Dandelion, Giant mountain dandelion, bigflower agoseris, large flowered agoseris
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