Sisyrinchium idahoense E. P. Bicknell
Family: Iridaceae
Idaho blue-eyed grass,  more...
Sisyrinchium idahoense image

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.

Plant: perennial herb; erect, to 45 cm tall; ROOTS fine to somewhat thickened; STEMS 1-2.5(-4) mm wide, simple (occasionally branched), the margins entire or minutely dentate, the surface glabrous

Leaves: folded lengthwise in iris-like fashion but somewhat flexuous, mostly basal and distichous, the margins slightly hyaline basally; (0.5-)1-3(-4.5) mm wide

INFLORESCENCE: an umbel with 2 spathe bracts, the lower (outer) bract enclosing the other (inner); SPATHE BRACTS with the dorsal keels entire or minutely dentate, unequal in length; outer bract 14-55 mm long, tapering evenly to the apex, the margins connate basally (2-)3-7 mm; inner bract 12-33 mm long, the hyaline margin narrow, ending at or just below the apex, the base curved or tapering evenly as it emerges from the outer bract

Flowers: light to deep blue-violet or purple with yellow bases; pedicels erect to ascending, glabrous or glandular-pubescent, at anthesis subequal to longer than the inner bract; tepals (6-)8-20 mm long, the outer with obtuse, truncate, or emarginate and apiculate apices; anthers 0.7-2(-2.5) mm long; filaments completely united; ovary glandular pubescent

Fruit: a capsule 3-6 mm long, obovoid to nearly spherical, straw-colored or beige; SEEDS 0.8-1.8 mm long, oblong to nearly spherical or angular, the surface generally granular

REFERENCES: Cholewa, Anita F. and Douglass M. Henderson. 1994. Iridaceae J. Ariz. - Nev. Acad. Sci. Volume 27(2), 215.

Sisyrinchium idahoense image
Sisyrinchium idahoense image
Sisyrinchium idahoense image
William R. Hewlett  
Sisyrinchium idahoense image
Keir Morse  
Sisyrinchium idahoense image
Keir Morse  
Sisyrinchium idahoense image
Keir Morse  
Sisyrinchium idahoense image
Gary A. Monroe  
Sisyrinchium idahoense image
Gary A. Monroe  
Sisyrinchium idahoense image
Gary A. Monroe  
Sisyrinchium idahoense image
Barry Breckling  
Sisyrinchium idahoense image
Jeremy Yoder