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Spec  SpecThompsonii (compare)

Difference: SpecThompsonii (r8 vs. r7)

(SPEC) Iris thompsonii R. C. Foster

1937, Botanical author Robert C. Foster

Iris thompsonii R. C. Foster Iris thompsonii R. C. Foster (Robert C. Foster, 1937). Series Californicae . Flower color is typically purple, but varies among other colors, including white, cream, gray, blue, red and lavender. The perianth tube is longer than in I. douglasiana or I. innominata . Plants are small, evergreen, with narrow leaves. There are one to two flowers per stem.

Flower color is typically purple, but varies among other colors, including white, cream, gray, blue, red and lavender. The perianth tube is longer than in I. douglasiana or I. innominata. Plants are small, evergreen, with narrow leaves. There are one to two flowers per stem.

Long thought to be a natural hybrid between Iris douglasiana and Iris innominata, this purple flowered species was recognized as a separate species initally by R.C. Foster, then subsumed into Iris innominata as a purple-flowered form by L. Lenz. In 1990, Wilson et al completed chromatography studies on all three species and concluded it is a valid species in on its own.

I. thompsonii is found south of Powers, Oregon in Coos County, southward into northern Del Norte County, California. It grows on open, lightly wooded sites, with sunnier aspect than preferred by I. innominata, and is well inland from the coastal areas preferred by I. douglasiana. Soil preference appears to be transitional between serpentines and non-serpentine soils in this region.

References: Wilson et al, 1990. Madrono 37:113.

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-- Main.RPries - 2010-02-23

IAttachmentActionSizeSorted ascendingDateWhoComment
Iris_thompsonii-3a.jpgjpgIris_thompsonii-3a.jpgmanage 74 K 08 Jun 2011 - 21:32 Main.ksayce Iris_thompsonii
thompsonii4.jpgjpgthompsonii4.jpgmanage 76 K 19 Sep 2013 - 16:53 Main.TLaurin Photo by Matilija Nursery
Iris_thompsonii-1a.jpgjpgIris_thompsonii-1a.jpgmanage 81 K 08 Jun 2011 - 21:31 Main.ksayce Iris_thompsonii
Iris_thompsonii-2a.jpgjpgIris_thompsonii-2a.jpgmanage 81 K 08 Jun 2011 - 21:32 Main.ksayce Iris_thompsonii

Revision r8 - 25 Feb 2016 - 00:41 - Main.Harloiris
Revision r7 - 30 Nov 2013 - 18:53 - Main.af.83
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