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Holocarpha obconica

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(Redirected from San Joaquin tarweed)

Holocarpha obconica
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Holocarpha
Species:
H. obconica
Binomial name
Holocarpha obconica
Synonyms[1]
  • Hemizonia obconica J.C.Clausen & D.D.Keck
  • Hemizonia vernalis D.D.Keck
  • Holocarpha obconica subsp. autumnalis D.D.Keck

Holocarpha obconica, commonly known as the San Joaquin tarweed, is a North American plant species in the sunflower family. It is endemic to (found only in) California, primarily in the Central Valley and adjacent regions.[2]

The epithet "obconica" means "obconical," in other words, shaped like a cone but with the widest part farthest from the base. Achenes of H. obconica are obconical. The plant is a resin-containing herb up to 120 cm (4 feet) tall. It produces numerous flower heads, each head containing 4–9 yellow ray flowers surrounding 11–21 small yellow disc flowers, the disc flowers having yellow or brown anthers.[3][4]

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