Olsynium douglasii

Olsynium douglasii is a species of flowering plant in the iris family (Iridaceae). Common names include Douglas' olsynium,[2] Douglas' grasswidow,[3] grass-widow, blue-eyed grass, purple-eyed-grass, and satin flower,[4] It is native to western North America, from southern British Columbia south to northern California, and east to northwest Utah. It is the only species in the genus Olsynium in North America, the remaining 11 species being from South America. It was formerly treated in the related genus Sisyrinchium.

Olsynium douglasii
Olsynium douglasii var. douglasii in Anacortes Community Forest Lands
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Iridaceae
Genus: Olsynium
Species:
O. douglasii
Binomial name
Olsynium douglasii
Synonyms[1]
  • Eriphilema grandiflora (Raf.) Herb.
  • Olsynium grandiflorum Raf.
  • Sisyrinchium douglasii A.Dietr.
  • Sisyrinchium grandiflorum Douglas ex Lindl.
  • Sisyrinchium inalatum A.Nelson

It is a herbaceous bulbiferous perennial growing 10–40 cm (3.9–15.7 in) tall. The leaves are slender, linear, 10–30 cm (3.9–11.8 in) long and 1.5–3 mm broad. The flowers are bell-shaped to star-shaped, 15–25 mm long, with six purple tepals.

There are two varieties:

  • Olsynium douglasii var. douglasii. Coastal western North America. Flower filaments with a narrow base
  • Olsynium douglasii var. inflatum. Interior western North America. Flower filaments with an inflated base

Olsynium douglasii has won the Royal Horticultural Society’s Award of Garden Merit.[5][6]

References
  1. "Olsynium douglasii (A.Dietr.) E.P.Bicknell — The Plant List". www.theplantlist.org.
  2. "Olsynium douglasii". Integrated Taxonomic Information System.
  3. "Olsynium douglasii". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 22 July 2015.
  4. "Douglas' Blue-eyed Grass - Olsynium douglasii var. douglasii - Common names - Encyclopedia of Life". Encyclopedia of Life.
  5. "RHS Plantfinder - Olsynium douglasii". Retrieved 14 April 2018.
  6. "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 69. Retrieved 14 April 2018.


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