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Plants › Sunflowers, Daisies, Asters, and Allies

Elk Thistle

Cirsium scariosum

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Wildlife study photograph from iNaturalist.
(c) aphidly, some rights reserved (CC BY-NC)

28 photos

Study shows up to four per card, from different observers, so you learn the species rather than one picture. Heart the good ones and swap any you do not like.

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Easily confused with

Study checks a spoken answer against these, and tells you which one you named.

Where it is recorded

Records by month in California.January 139, February 120, March 125, April 155, May 151, June 195, July 225, August 97, September 123, October 126, November 162, December 125.
United States4,421
California1,529
Wyoming1,055
Idaho360
Colorado327
Oregon259
Nevada148
Utah128
Canada117
Arizona52

Counts show where people looked, not only where it lives.

Traits

Group and habits

  • Forb or herb growth formListed by a harvested source as having a forb or herbaceous growth form.USDA PLANTS Characteristics
  • Biennial plantListed by a harvested source as having a biennial life duration.USDA PLANTS Characteristics
  • Perennial plantListed by a harvested source as having a perennial life duration.USDA PLANTS Characteristics
  • Pollinator-associated plantDescends from a plant lineage commonly associated with pollinators.Inferred from its group

Classification

KingdomPlants · Plantae
PhylumVascular Plants · Tracheophyta
ClassDicots · Magnoliopsida
OrderSunflowers, Bellflowers, Fanflowers, and Allies · Asterales
FamilySunflowers, Daisies, Asters, and Allies · Asteraceae
GenusPlume Thistles · Cirsium

Study it in a deck

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Sources

Remember the name next time.

Practise Elk Thistle with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.

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