Iris douglasiana

Iris douglasiana
Douglas Iris
Douglas Iris, Point Reyes National Seashore
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Asparagales
Family: Iridaceae
Genus: Iris
Subgenus: Limniris
Series: Iris ser. Californicae
Species: I. douglasiana
Binomial name
Iris douglasiana
Herb.

Iris douglasiana, known as the Douglas iris, is a common and attractive wildflower of the coastal regions of Northern and Central California and southern Oregon. The names Iris beecheyana and I. watsoniana have also been used for this plant, but Iris douglasiana has precedence.

The Douglas Iris grows mainly at lower elevations, below 100 metres (330 ft), though it is occasionally found at heights of up to 1,000 metres (3,300 ft). It is most common in grasslands near the coast; it is regarded as a noxious weed in pastures, because it forms clumps that inhibit other vegetation, and its leaves are bitter and unpalatable to cattle.

This is a typical beardless Iris of subgenus Limniris, series Californicae, growing from a rhizome that is typically under a centimetre in diameter. Its leaves are about 2 centimetres (1 in) wide. It flowers from April to June. Flowers are usually a purplish-blue, though occasionally white or yellow flowers are found. Two or three flowers are found on each stem, which is of variable height, ranging from 15–80 centimetres (5.9–31 in) tall.

Several varieties have been recognised, for example Iris douglasiana var. altissima (Jeps.) and Iris douglasiana var. oregonensis (R. C. Foster), but the species is highly variable and the varieties may not be well enough defined to be of much practical use. The Douglas Iris hybridises freely with several other species; its natural hybrid with I. innominata has been designated as Iris ×thompsonii (R. C. Foster), and the garden hybrid with the same species as Iris ×aureonympha (E. H. English).

Closeup of flower

External links


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Look at other dictionaries:

  • Iris douglasiana — ID 42828 Symbol Key IRDO Common Name Douglas iris Family Iridaceae Category Monocot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution CA, OR Growth Habit Forb/herb Duration …   USDA Plant Characteristics

  • Iris douglasiana Herbert — Symbol IRDO Common Name Douglas iris Botanical Family Iridaceae …   Scientific plant list

  • Iris douglasiana Herbert var. major Torr. — Symbol IRDO Synonym Symbol IRDOM2 Botanical Family Iridaceae …   Scientific plant list

  • Iris douglasiana Herbert var. oregonensis R.C. Foster — Symbol IRDO Synonym Symbol IRDOO Botanical Family Iridaceae …   Scientific plant list

  • Iris (genre vegetal) — Iris (genre végétal) Pour les articles homonymes, voir Iris …   Wikipédia en Français

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  • Iris (plant) — This article is about the Iris plant. For other uses, see Iris (disambiguation). Other plants named iris are found elsewhere in the Iridaceae. Iris Blood Iris (Iris sanguinea), known as ayame in Japan …   Wikipedia

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  • Douglas Iris — Taxobox name = Douglas Iris image width = 250px image caption = Douglas Iris, Point Reyes National Seashore regnum = Plantae divisio = Magnoliophyta classis = Liliopsida ordo = Asparagales familia = Iridaceae subfamilia = Iridoideae tribus =… …   Wikipedia

  • Виды рода Ирис — Приложение к статье Ирис Список видов, входящих в род Ирис (Iris) Возможна прямая и обратная сортировка по всем колонкам. В конце последней колонки приведена ссылка на персональную страницу таксона на сайте GRIN. При сортировке третьей колонки… …   Википедия

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