Calycadenia spicata

Calycadenia spicata is a species of flowering plant in the daisy family known by the common name spiked western rosinweed. It is endemic to central California, where is a common grassland plant in the Central Valley and adjacent Sierra Nevada foothills from Butte County to Kern County.[1]

Calycadenia spicata
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Genus:
Calycadenia
Species:
C. spicata
Binomial name
Calycadenia spicata
Synonyms

Hemizonia spicata Greene

Calycadenia spicata is an annual herb producing a hairy, glandular stem 20 to 60 centimeters (8-24 inches) tall. The leaves are linear in shape and up to 5 centimeters (2 inches) long, sometimes longest toward the middle of the stem. The inflorescence bears one or more flower heads at separate nodes, surrounded by short bracts tipped with resin glands. The glandular and hairy flower heads have a center of several disc florets as well as whitish, triple-lobed ray florets. The fruit is an achene; those arising from the disc florets have a pappus of scales.[2]

References
  1. Calflora taxon report, University of California, Calycadenia spicata (E. Greene) E. Greene, spicate calycadenia, spiked western rosinweed
  2. Flora of North America, Calycadenia spicata (Greene) Greene, Fl. Francisc. 4: 422. 1897.


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