Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.



Elizabeth McClintock, except as specified

Perennial, bulbed, cormed, or rhizomed
Stem generally erect
Leaves generally basal (a few cauline), 2-ranked, ± linear, generally grass-like, generally sharply folded along midrib; bases overlapping, sheathing
Inflorescence: spike, raceme, panicle, ± terminal, or flowers solitary; bracts ± like leaf bases, sheathing
Flower generally bisexual, generally radial; hypanthium fused to ovary; perianth parts generally fused into tube above ovary, generally petal-like, in 2 series of 3, outer (sepals) generally ± like inner (petals); stamens 3, generally attached to sepals, filaments fused below into a tube or not; ovary inferior, 3-chambered, placentas generally axile, style 1, each of 3 branches entire or 2-branched or -lobed, petal-like or not, with stigma on under surface instead of at tip
Fruit: capsule, loculicidal
Seeds few–many
Genera in family: 80 genera, ± 1500 species: worldwide, especially Africa; many cultivated (e.g., Iris, Gladiolus, Crocus, Freesia ).


Douglass M. Henderson and Anita F. Cholewa

Perennial; rhizomes compact
Stems single or tufted, generally ± flat and winged or rounded, sometimes with leaf-bearing nodes well above basal leaves, each with 1 or more flower-branches
Leaf narrow, grass-like
Inflorescence: flowers in umbel-like clusters; bracts 2, equal in length or not, margins translucent
Flower ephemeral; perianth reddish purple, bluish, violet, yellow, rarely white, parts ± alike, but outer generally wider; filaments ± completely free to ± completely fused
Seeds ovoid, smooth or pitted
Species in genus: ± 70 species: w hemisphere
Etymology: (Name used by Theophrastus for Iris-like plant)
Reference: [Henderson 1976 Brittonia 28:149–176]


S. idahoense E.P. Bicknell

Stems tufted, < 45 cm, sometimes with 1 or more leaf-bearing nodes, green to glaucous
Inflorescence: translucent margins of inner bract ± uniformly narrow
Flower: perianth 8–17 mm, generally blue to blue-violet, outer parts generally narrowly elliptic or oblanceolate, tips rounded to deeply notched, with a small point
Ecology: Open, moist, grassy places
Elevation: 900–3150 m.
Bioregional distribution: Klamath Ranges, Cascade Range, Sierra Nevada, Great Basin Floristic Province
Distribution outside California: to British Columbia, Montana, Colorado
Highly variable, self- or cross-pollinating. Varieties intergrade.


var. idahoense

Stem: upper margin generally with a few widely spaced, fine teeth
Inflorescence: margins of outer bract fused in basal 4–7 mm
Flower: perianth generally >> 13 mm
Chromosomes: n=32,48
Ecology: Common. Habitat of sp.
Bioregional distribution: Klamath Ranges, Cascade Range, Modoc Plateau
Distribution outside California: to British Columbia, Montana
Horticultural information: IRR, DRN: 6, 7, 14, 15, 16 &SUN: 1, 2, 3, 4, 5, 17.

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bioregional map for SISYRINCHIUM%20idahoense%20var.%20idahoense being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Sisyrinchium idahoense var. idahoense
Retrieve dichotomous key for Sisyrinchium
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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