Flora of North America species comparison

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Sisyrinchium idahoense

Idaho blue-eyed-grass
Habit Herbs, perennial, cespitose, green to ashy olive when dry, to 4.5 dm, not glaucous; rhizomes scarcely discernable.
Stems

simple, obviously winged, 1–2.5 mm wide, glabrous, margins entire to denticulate apically, similar in color and texture to stem body.
Leaf

blades glabrous, bases not persistent in fibrous tufts.
Inflorescences

borne singly;

spathes usually green, glabrous, keels entire to denticulate;

outer 14–55(–65) mm, 13–16 mm longer than inner, basally connate 2.6–7 mm, tapering evenly towards apex;

inner with keel evenly curved to straight, hyaline margins 0.1–0.5 mm wide, apex acuminate to acute, ending 0.5–2.1 mm proximal to green apex.
Flowers

tepals light to deep bluish violet or occasionally purple, bases yellow;

outer tepals 8–20 mm, apex rounded, truncate, or emarginate, aristate;

filaments connate ± entirely, stipitate-glandular basally;

ovary similar in color to foliage.
Capsules

beige to light or dark brown, occasionally with purple blotches on apex, ± globose to pyriform, 3–6 mm;

pedicel erect to ascending.
Seeds

globose to obconic, lacking obvious depression, 0.8–1.8 mm, usually granular.

Sisyrinchium idahoense
Distribution
from USDA
w North America
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 4 (4 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Stems less than 1.5 mm wide.
→ 2
1. Stems 1.5 mm or more wide.
→ 3
2. Outer tepals 18–20 mm; outer spathe at least 2 times inner; margins of stem and keels of spathes entire.
var. macounii
2. Outer tepals 10–17 mm; outer spathe less than 2 times inner; margins of stem and keels of spathes denticulate.
var. segetum
3. Outer tepals 8–13 mm; inner spathe 12–20 mm; stem 1.5–2 mm wide.
var. occidentale
3. Outer tepals 13–17(–20) mm; inner spathe 20–30 mm; stem 2–2.5 mm wide.
var. idahoense
Source FNA vol. 26, p. 369.
Parent taxa Iridaceae > Sisyrinchium
Sibling taxa
S. albidum, S. angustifolium, S. arizonicum, S. atlanticum, S. bellum, S. biforme, S. californicum, S. campestre, S. capillare, S. cernuum, S. demissum, S. dichotomum, S. elmeri, S. ensigerum, S. funereum, S. fuscatum, S. groenlandicum, S. halophilum, S. hitchcockii, S. langloisii, S. littorale, S. longipes, S. miamiense, S. minus, S. montanum, S. mucronatum, S. nashii, S. pallidum, S. pruinosum, S. radicatum, S. rosulatum, S. sagittiferum, S. sarmentosum, S. septentrionale, S. strictum, S. xerophyllum
Subordinate taxa
S. idahoense var. idahoense, S. idahoense var. macounii, S. idahoense var. occidentale, S. idahoense var. segetum
Name authority E. P. Bicknell: Bull. Torrey Bot. Club 26: 445. (1899)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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