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Grindelia hirsutula

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Grindelia hirsutula
Scientific classification
Kingdom:
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Species:
G. hirsutula
Binomial name
Grindelia hirsutula
Hook. & Arn. 1833
Synonyms[1]

Grindelia hirsutula is a North American species of flowering plant in the daisy family known by the common names hairy gumplant and hairy gumweed.[2][3]

Distribution

Grindelia hirsutula is native to North America, widespread across Canada and in California and Oregon.[4][5] The species is highly variable, and many local populations have been named as varieties or as distinct species. All these taxa do, however, intergrade with one another.[6]

Description

Grindelia hirsutula is an erect perennial herb or subshrub sometimes as much as 250 cm (100 inches or 8 1/3 feet) tall but usually much shorter. The plant is usually green but the stems are often red or purplish-brown and the leaves can be somewhat yellowish to reddish.

The plant can produce numerous flower heads in branching arrays at the top of the plant. Each head is 2 or 3 centimeters (0.8-1.2 inches) wide with hemispheric cups of greenish phyllaries around the base, the bracts claw-like and bent away from the flowers. The center of the head is filled with many small yellow disc florets surround by numerous golden ray florets. The head produces a thick white exudate, especially in new flower heads.[6]

Varieties

References

  1. ^ The Plant List, Grindelia hirsutula Hook. & Arn.
  2. ^ Calflora taxon report, University of California, Grindelia hirsutula Hook. & Arn., Gumweed, hairy gumweed
  3. ^ Encyclopedia of Life: Grindelia hirsutula
  4. ^ "Grindelia hirsutula". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 4 January 2018.
  5. ^ USDA: Grindelia hirsutula distribution map
  6. ^ a b Flora of North America, Grindelia hirsutula Hooker & Arnott, Bot. 1833.
  7. ^ Calflora: Grindelia hirsutula var. maritima
  8. ^ USDA: Grindelia hirsutula var. maritima
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Grindelia hirsutula
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