Eriophyllum confertiflorum

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Eriophyllum confertiflorum
Eriophyllum confertiflorum 2004-04-07.jpg
Scientific classification
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Species:
E. confertiflorum
Binomial name
Eriophyllum confertiflorum
Synonyms [1]
Synonymy
  • Bahia confertifloraDC. 1836
  • Bahia tenuifoliaDC.
  • Eriophyllum cheiranthoidesRydb.
  • Eriophyllum crucigerumRydb.
  • Eriophyllum tenuifolium(DC.) Rydb.
  • Eriophyllum tanacetiflorumGreene, syn of var. tanacetiflorum
  • Bahia trifidaNutt., syn of var. trifidum
  • Eriophyllum trifidum(Nutt.) Rydb., syn of var. trifidum

Eriophyllum confertiflorum, commonly called golden yarrow or yellow yarrow, [2] is a North American species of plant in the sunflower family, native to California and Baja California. It has wooly leaves when young, and yellow flower heads. [3] "Eriophyllum" means "wooly leaved." [3] [4]

Contents

Eriophyllum confertiflorum gets its common name from the similar appearance of its inflorescence to the true yarrow , which has white flowers. [3] [5] [6]

Habitat and distribution

Eriophyllum confertiflorum is a highly variable plant which is generally a small shrub. It grows primarily in the Sierra Nevada and Coastal Ranges in California and Baja California. It can be found in a number of plant communities and habitats. In the Santa Monica Mountains of California, it is common in open places that are away from the coast. [3]

Eriophyllum confertiflorum grows in large clumps or stands of many erect stems often exceeding 50 cm (20 inches) in height. Botanist Nancy Dale describes the growth pattern as "tidy". [3] Leaves are alternate. [3] Leaves and stems are whitish when young, because of being covered in wooly white hairs, then become greenish to gray-green. [3] Leaves have 3-5 deep lobes. [3] Yellow flowers are crowded in the head, which is up to 3/8 inch (0.94 cm) across, flat-topped, with both disc flowers and ray flowers. [3] "Confertiflorum" means densely flowered. [3] It blooms from January to July. [3] The fruit is an achene with a very short pappus. The top of each stem forms an inflorescence of up to 30} flower heads, each bright golden yellow head with a large center of disc florets and usually a fringe of rounded to oval ray florets. [2]

Varieties [2] [6] [1]

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References

  1. 1 2 The Plant List, Eriophyllum confertiflorum (DC.) A.Gray
  2. 1 2 3 Flora of North America, Eriophyllum confertiflorum (de Candolle) A. Gray, 1883. Golden or yellow yarrow
  3. 1 2 3 4 5 6 7 8 9 10 11 Flowering plants: The Santa Monica Mountains, coastal & chaparral regions of Southern California, Nancy Dale, 2nd Ed., 2000, p. 63
  4. Mooring, J. S. 1994. A cytogenetic study of Eriophyllum confertiflorum (Compositae, Helenieae). American Journal of Botany 81: 919–926.
  5. Biota of North America Program 2014 county distribution map
  6. 1 2 Calflora taxon report, University of California, Eriophyllum confertiflorum (DC.) A. Gray Yellow Yarrow, golden yarrow
  7. Rydberg, Per Axel 1915. North American Flora 34(2): 95 as Eriophyllum trifidum
The buds are small, oval, and greenish-white. Eriophyllum confertiflorum yellow yarrow.jpg
The buds are small, oval, and greenish-white.