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Iris douglasiana Herbert
DOUGLAS IRIS
Mountain Iris

Life   Plantae   Monocotyledoneae   Iridaceae   Iris

Iris douglasiana
© Copyright Gary Perlmutter 2010 · -9
Iris douglasiana

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Pucciniaceae  Puccinia iridis @ BPI (21)

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Following modified from Flora of North America
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FNA Vol. 26 Page 374, 381, 382, 384 , 385, 386, 387 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 26 | Iridaceae | Iris

13. Iris douglasiana Herbert G. A. W. Arnott in W. J. Hooker and, Bot. Beechey Voy. 395. 1840.

Mountain iris

Iris beecheyana Herbert; I. douglasiana var. alpha Dykes; I. douglasiana var. altissima Purdy ex Jepson; I. douglasiana var. beecheyana (Herbert) Baker; I. douglasiana var. bracteata Herbert; I. douglasiana var. major Torrey; I. douglasiana var. mendocinensis Eastwood; I. douglasiana var. nuda Herbert; I. douglasiana var. oregonensis R. C. Foster; I. watsoniana Purdy

Rhizomes freely branching, forming large colonies, slender, 0.8—0.9 cm diam., covered with remains of old leaves; roots fibrous. Stems 1—4-branched, solid, 1.5—7 dm. Leaves: basal with blade yellow-green, occasionally darker green, sometimes flushed pink or red basally, prominently ribbed, linear, 4.5—10 dm × 2 cm, apex acute; cauline 1—3, reduced. Inflorescence units (2—)3-flowered, branch units 2—3-flowered; spathes opposite or separated, divergent, green, sometimes flushed purple basally, lanceolate-acuminate, 6—12 cm × 7—12 mm. Flowers: perianth deep red-purple, lavender, gray-blue, cream, or white, with gold signal and blue or purple veins; floral tube 1.5—2.8 cm, usually widening to bowl shape at base of flower; sepals oblanceolate to obovate, 5—9 × 1.4—3 cm, base gradually attenuate, apex obtusely rounded; petals oblanceolate, 4.5—7 × 0.9—1.8 cm, base attenuate to narrow claw; ovary elliptic-oval, sharply triangular in cross section, 3—4 cm; style 1.7—3.5 cm; crests overlapping, subquadrate, 1—2 cm, margins coarsely toothed; stigmas triangular; pedicel 2—5 cm. Capsules sharply triangular in cross section with ridge at each angle, tapering at both ends, remnant of floral tube forming tip at apex, 2.5—5 cm. Seeds dark brown, pyriform, wrinkled. 2n = 40.

Flowering Apr--Jun. Open woods, sunny slopes and fields; Calif., Oreg.

R. C. Foster (1937) named several varieties of Iris douglasiana, about which L. W. Lenz (1954) said, "This is a widespread and extremely variable species whose total variability is being increased due to introgressive hybridization between it and other species with which it has come into contact. Well marked and distinct geographic races cannot be detected; however, pronounced variations are to be found within a single population. For these reasons no attempt is made here to segregate taxa within such a polymorphic species."

Iris douglasiana hybridizes with I. bracteata, I. chrysophylla, I. fernaldii, I. hartwegii, I. innominata, I. macrosiphon, I. munzii, I. purdyi, I. tenax, and I. tenuissima. The natural hybrid between I. douglasiana and I. innominata has been designated as Iris ×thompsonii R. C. Foster and the garden hybrid as Iris ×aureonympha E. H. English.

Following modified from CalPhotos
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CalPhotos     Photo Database

 

Number of matches : 126
Query: SELECT * FROM img WHERE ready=1 and taxon like "Iris douglasiana%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Iris douglasiana
Iris douglasiana
Iris
ID: 6040 1631 1336 0029 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas's Iris
ID: 6040 1631 1336 0023 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas's Iris
ID: 6040 1631 1336 0022 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 0000 0000 1202 0413 [detail]
© 1994 Gary A. Monroe

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 6040 1631 1336 0054 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 8253 3202 3489 0105 [detail]
Gerald and Buff Corsi
© 1999 California Academy of Sciences

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 6040 1631 1336 0056 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 6040 1631 1336 0055 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 8253 3202 4145 0135 [detail]
Gladys Lucille Smith
© 1999 California Academy of Sciences

Iris douglasiana
Iris douglasiana
Douglas's Iris
ID: 0024 3291 1999 0069 [detail]
Frithjof Holmboe
© 2000 California Academy of Sciences

Iris douglasiana
Iris douglasiana
Douglas's Iris
ID: 6040 1631 1336 0027 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Iris
ID: 6040 1631 1336 0032 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 6040 1631 1336 0057 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas's Iris
ID: 6040 1631 1336 0026 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas's Iris
ID: 6040 1631 1336 0021 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 6040 1631 1336 0060 [detail]
© 1995 Saint Mary's College of California

Iris douglasiana
Iris douglasiana
Douglas' Iris, Marin Iris
ID: 8120 3181 4908 0027 [detail]
Charles Webber
© 1998 California Academy of Sciences

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 0000 0000 1203 0176 [detail]
© 2003 Joseph Dougherty/ecology.org

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 8253 3202 4147 0094 [detail]
Beatrice F. Howitt
© 1999 California Academy of Sciences

Iris douglasiana
Iris douglasiana
Douglas' Iris
ID: 0000 0000 1000 0350 [detail]
© 2000 Joseph Dougherty/ecology.org

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 0000 0000 0403 0475 [detail]
© 2003 Michael Charters

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 0024 3291 2008 0125 [detail]
Gerald and Buff Corsi
© 2000 California Academy of Sciences

Iris douglasiana
Iris douglasiana
Douglas Iris
ID: 0000 0000 1202 0415 [detail]
© 1994 Gary A. Monroe

Iris douglasiana
Iris douglasiana
Iris
ID: 6040 1631 1336 0033 [detail]
© 1995 Saint Mary's College of California

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


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