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Idaho blue-eyed-grass

Nevada blue-eyed-grass

Habit Herbs, perennial, cespitose, green to ashy olive when dry, to 4.5 dm, not glaucous; rhizomes scarcely discernable. Herbs, perennial, cespitose, green to ashy olive when dry, to 2.6 dm, often strongly 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.

simple, 0.5–3 mm wide, glabrous, margins entire, similar in color and texture to stem body.

Leaf

blades glabrous, bases not persistent in fibrous tufts.

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.

borne singly;

spathes usually green, glabrous, keels entire;

outer 13–27 mm, equaling or 3 mm longer than inner, tapering evenly towards apex, margins basally connate 2.7–5.5 mm;

inner with keel evenly curved to straight, hyaline margins 0.40.6 mm wide, apex broadly rounded or truncate, often erose, often extending as 2 lobes beyond 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.

tepals light to dark bluish violet, bases yellow;

outer tepals 9–12 mm, apex truncate, 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.

beige, ± globose, 2.2–4 mm;

pedicel erect.

Seeds

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

globose to obconic, lacking obvious depression, 1–1.7 mm, rugulose.

2n

= 32.

Sisyrinchium idahoense

Sisyrinchium halophilum

Phenology Flowering spring–summer.
Habitat Moist, grassy areas, stream banks, springs, meadows, especially in alkaline soil
Elevation 1100–2600 m (3600–8500 ft)
Distribution
from USDA
w North America
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; NV; OR; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 4 (4 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Sisyrinchium halophilum is the most common species of the genus in Nevada and eastern California.

(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. FNA vol. 26, p. 368.
Parent taxa Iridaceae > Sisyrinchium 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
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. hitchcockii, S. idahoense, 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
Synonyms S. leptocaulon
Name authority E. P. Bicknell: Bull. Torrey Bot. Club 26: 445. (1899) Greene: Pittonia 4: 34. (1899)
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