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Calycadenia oppositifolia

From Wikipedia, the free encyclopedia

Calycadenia oppositifolia

Vulnerable  (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Calycadenia
Species:
C. oppositifolia
Binomial name
Calycadenia oppositifolia
Synonyms[2]
  • Hemizonia oppositifolia Greene

Calycadenia oppositifolia is a species of flowering plant in the family Asteraceae known by the common name Butte County western rosinweed. It is native primarily to Butte County, California, although a few populations have been found in other parts of the state.[3] It grows in the foothills of the high mountain ranges.

Description

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Calycadenia oppositifolia is an annual herb producing an erect, unbranching, hairy stem approaching 30 centimeters (12 inches) in maximum height. The leaves are linear in shape and up to 5 centimeters (2 inches) long, arranged oppositely about the stem. The inflorescence bears bracts coated in large resin glands and dense clusters of flower heads. The hairy, glandular flower head has a center of several disc florets surrounded by a few white or reddish triple-lobed ray florets. Each ray floret has three lobes at the tip, the middle lobe being shortest. The fruit is an achene; those developing from the disc florets have a pappus of scales.[4]

References

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  1. ^ "NatureServe Explorer 2.0".
  2. ^ The Plant List, Calycadenia oppositifolia (Greene) Greene
  3. ^ Calflora taxon report, Calycadenia oppositifolia (E. Greene) E. Greene, Butte County calycadenia
  4. ^ Flora of North America, Calycadenia oppositifolia (Greene) Greene, Fl. Francisc. 4: 423. 1897
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