Symphyotrichum defoliatum

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Symphyotrichum defoliatum
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Imperiled (NatureServe)[1]
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Symphyotrichum
Subgenus: Symphyotrichum subg. Ascendentes
Species:
S. defoliatum
Binomial name
Symphyotrichum defoliatum
Endemic range of Symphyotrichum defoliatum in California outlined in red: San Gabriel Mountains, San Bernardino Mountains, and Peninsular Ranges.
Endemic range in California outlined in red[3]
Synonyms[2]

Basionym

  • Aster defoliatus Parish
Alphabetical list

Symphyotrichum defoliatum (formerly Aster bernardinus and Aster defoliatus) is a species of flowering plant in the family Asteraceae known by the common name San Bernardino aster.[4] It is endemic to Southern California where it grows in grasslands and meadows, and it is of conservation concern.

Description[]

Symphyotrichum defoliatum is a perennial herbaceous plant growing from a long rhizome to a maximum height of 15 decimeters (5 feet). Leaves are widely lance-shaped to oblong and pointed, the largest ones near the base of the stem reaching up to 12 centimeters (4+3⁄4 inches) long. The stem and leaves are roughly hairy. The inflorescence is an array of flower heads with 15–40 pale violet ray florets around a center of golden disc florets. The fruit is a hairy cypsela with a long pappus.[5]

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  • Symphyotrichum defoliatum 99902633.jpg
  • Symphyotrichum defoliatum 52998472.jpg
  • Symphyotrichum defoliatum 99902649.jpg
  • Symphyotrichum defoliatum 99902663.jpg

Chromosomes[]

Symphyotrichum defoliatum is an allopolyploidal species likely derived from the backcrossing of S. falcatum (chromosome base number x = 5) with S. ascendens (base number x = 13), its hybrid derivative. The backcrossing produced this species with a unique base number of x = 18[6][7] and diploidal individuals with 2n = 36.[5]

Distribution and habitat[]

San Bernardino aster is endemic to Southern California, where it is known only from the San Bernardino and San Gabriel Mountains of the Transverse Ranges, and from part of the Peninsular Ranges to the south. It grows in grassland and meadow habitats and in disturbed areas.[5]

Citations[]

  1. ^ NatureServe 2021.
  2. ^ Jump up to: a b POWO 2021.
  3. ^ Allen 2012.
  4. ^ USDA, NRCS 2014.
  5. ^ Jump up to: a b c Brouillet et al. 2006.
  6. ^ Semple n.d.
  7. ^ Semple 2021.

References[]

  • (2012). "Symphyotrichum defoliatum". In Jepson Flora Project (ed.). Jepson eFlora. The Jepson Herbarium, University of California, Berkeley. Retrieved 25 July 2021.
  • Brouillet, L.; Semple, J.C.; ; ; (2006). "Symphyotrichum defoliatum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). 20. New York and Oxford. Retrieved 15 July 2021 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  • NatureServe (2 July 2021). "Symphyotrichum defoliatum San Bernardino Aster". NatureServe Explorer (explorer.natureserve.org). Arlington, Virginia: NatureServe. Retrieved 15 July 2021.
  • POWO (2021). "Symphyotrichum defoliatum (Parish) G.L.Nesom". Plants of the World Online (www.plantsoftheworldonline.org). Royal Botanic Gardens, Kew. Retrieved 22 July 2021.
  • Semple, J.C. (n.d.). "Symphyotrichum subg. Ascendentes". University of Waterloo (UWaterloo.ca). Waterloo, Ontario: University of Waterloo. Archived from the original on 22 July 2021. Retrieved 22 July 2021.
  • Semple, J.C. (14 May 2021). "Symphyotrichum ascendens — Long-leaved Aster, Intermountain Aster, Western Aster". University of Waterloo (UWaterloo.ca). Waterloo, Ontario: University of Waterloo. Archived from the original on 22 July 2021. Retrieved 22 July 2021.
  • USDA, NRCS (2014). "Symphyotrichum defoliatum". USDA PLANTS Database (plants.sc.egov.usda.gov). Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 22 July 2021.

External links[]

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