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Sisyrinchium idahoense var. occidentale

Higher Taxonomy
Family: IridaceaeView DescriptionDichotomous Key

Common Name: IRIS FAMILY
Habit: [(Annual), shrub], perennial herb generally from [bulb], corm, or rhizome. Stem: generally erect, generally +- round in ×-section. Leaf: generally basal (few cauline), 2-ranked, +- sword-shaped, blade edge-wise to stem, with midvein or not; bases overlapped, sheathing. Inflorescence: generally +- terminal; spikes, umbel-like cymes, or flowers 1; flowers in spikes or 1 subtended by 2 subopposite flower bracts; umbel-like cymes enclosed by 2 subopposite, generally large, leaf-like inflorescence bracts, including various flower bracts. Flower: bisexual (unisexual), radial, with stamens erect, enclosing style, or bilateral, with stamens, style to 1 side, stamens not enclosing style; perianth radial, parts free or generally fused into tube above ovary, generally petal-like, in 2 series of 3, outer +- like inner (or not, in Iris, parts in that genus called sepals, petals), upper +- like lower or not; stamens 3, attached at base of outer 3 perianth parts or in tube, generally free; ovary inferior [(superior)], [(1)]3-chambered, placentas axile [(parietal)], style 1, branches 3, entire to 2-branched, thread- or petal-like with stigma abaxial, proximal to tip. Fruit: capsule, loculicidal. Seed: few to many.
Genera In Family: +- 65 genera, +- 2050 species: worldwide, especially Africa; many cultivated (e.g., Crocus, Dietes, Freesia, Gladiolus, Iris, Sisyrinchium). Note: Gladiolus italicus Mill., Gladiolus tristis L. are urban weeds. Sparaxis grandiflora (D. Delaroche) Ker Gawl., Sparaxis tricolor (Schneev.) Ker Gawl. are waifs.
eFlora Treatment Author: Peter Goldblatt, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: SisyrinchiumView DescriptionDichotomous Key

Habit: [Annual] perennial herb; rhizomes compact. Stem: 1 or tufted, +- flat, winged, nodes well above basal leaves with leaves or not, each with >= 1 flower-branch. Leaf: bases overlapped, sheathing. Inflorescence: flowers in umbel-like cymes; bracts 2, equal in length or not, margins translucent. Flower: perianth red-purple, +- blue, violet, yellow (white), parts mucronate, +- alike, outer generally wider; filaments +- free to +- fused. Seed: ovoid, smooth or pitted.
Species In Genus: 100+ species: western hemisphere. Etymology: (Latin, sus, pig, and Greek, rhynchos, snout, alluding to swine digging the roots of some bulbous plant for food, spoken of by Pliny and Theophrastus (W.J. Hooker, 1830). The reason for applying the name to a genus of New World Iridaceae was apparently arbitrary.) Note: Use of treatments prior to +- 2003 often results in misidentification. Sisyrinchium douglasii moved to Olsynium.
Unabridged Note: Use of treatments prior to +- 2003 often results in misidentification due to inconsistent or incorrect use of morphological terms and the fact the taxa look very much alike.
eFlora Treatment Author: Anita F. Cholewa
Species: Sisyrinchium idahoenseView Description 

Stem: tufted, < 45 cm, green to glaucous, leaf-bearing nodes 0(1). Inflorescence: translucent margins of inner bract +- uniformly narrow. Flower: perianth 8--17(20) mm, generally blue to blue-violet, base yellow, outer parts generally elliptic to narrowly oblanceolate, tips rounded to deep-notched.
Note: Highly variable, self- or cross-pollinated. Varieties intergrade; 2 others, in Washington, British Columbia.

Sisyrinchium idahoense var. occidentale (E.P. Bicknell) Douglass M. Hend.
Stem: distal margin generally entire. Inflorescence: margins of outer bract fused generally in basal 3--6 mm. Flower: outer perianth parts 8--13 mm. Chromosomes: n=32.
Ecology: Open, moist, grassy places; Elevation: 100--2850 m. Bioregional Distribution: SN, SNE; Distribution Outside California: to eastern Washington, southwestern Montana, Colorado, New Mexico. Flowering Time: Jun--Aug
Synonyms: Sisyrinchium occidentale E.P. Bicknell; Sisyrinchium oreophilum E.P. Bicknel var. occidentale (E.P. Bicknell) Douglass M. Hend.
Unabridged Note: However, such accessions probably belong to Sisyrinchium idahoense var. idahoense.
eFlora Treatment Author: Anita F. Cholewa
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Citation for this treatment: Anita F. Cholewa 2016. Sisyrinchium idahoense var. occidentale, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 30, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 30, 2016.

Sisyrinchium idahoense var. occidentale
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© 2010 Barry Breckling
Sisyrinchium idahoense var. occidentale
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© 2012 Neal Kramer
Sisyrinchium idahoense var. occidentale
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© 2001 Gary A. Monroe
Sisyrinchium idahoense var. occidentale
click for enlargement
© 2001 Gary A. Monroe
Sisyrinchium idahoense var. occidentale
click for enlargement
© 2012 Neal Kramer
Sisyrinchium idahoense var. occidentale
click for enlargement
© 2012 Neal Kramer

More photos of Sisyrinchium idahoense var. occidentale in CalPhotos

Geographic subdivisions for Sisyrinchium idahoense var. occidentale:
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.