Sisyrinchium atlanticum
Sisyrinchium littorale
eastern blue-eyed-grass
Alaska blue-eyed grass, shore blue-eyed-grass
branched, with 1 or 2 nodes, 0.8–1.9 mm wide, usually glabrous, margins entire, similar in color and texture to stem body;
first internode 11–36 cm, longer than leaves;
distalmost node with 2–3 branches.
simple, obviously winged, 2.2–3.5 mm wide, glabrous, margins denticulate, similar in color and texture to stem body.
blades usually glabrous, bases occasionally becoming fibrous, but not persistent in tufts.
blades glabrous, bases not persistent in fibrous tufts.
borne singly;
spathes green or occasionally with purplish tinge on margins, obviously wider than supporting branch, glabrous or slightly scabrous, keels entire;
outer 12–16.1 mm, 1.4 mm shorter to 1.5 mm longer than inner, tapering evenly towards apex, margins basally connate 3–5.2 mm;
inner with keel evenly curved or straight, hyaline margins 0.2–0.6 mm wide, apex broadly rounded to truncate, usually erose, ending 0–0.5 mm proximal to green apex or, occasionally, exceeding it by up to 0.5 mm.
borne singly;
spathes green, glabrous, keels entire or denticulate;
outer 36–58 mm, 6–39 mm longer than inner, tapering evenly towards apex, margins basally connate 4.5–7 mm;
inner with keel evenly curved, hyaline margins 0.2–0.5 mm wide, apex acute, ending 0.2–2 mm proximal to green apex.
tepals light blue or bluish violet to purple or occasionally white, bases yellow;
outer tepals 6.3–11 mm, apex emarginate to truncate, aristate;
filaments connate ± entirely, stipitate-glandular basally;
ovary blackish, in contrast with much lighter foliage.
tepals light blue to usually deep bluish violet, bases yellow;
outer tepals 11–16 mm, apex rounded to slightly truncate, aristate;
filaments connate ± entirely, stipitate-glandular basally;
ovary similar in color to foliage.
dark brown to black or purplish black, ± globose to obovoid, 2–4.1 mm;
pedicel ascending to erect.
beige to dark brown, ± globose, 6.2–8.1 mm;
pedicel erect to ascending.
globose to obconic, lacking obvious depression, 0.5–1.2 mm, rugulose or occasionally granular.
globose to obconic, lacking obvious depression, 1.2–1.7 mm, rugulose.
= 16, 32.
= 96.
Sisyrinchium atlanticum
Sisyrinchium littorale
Populations of Sisyrinchium littorale in coastal Washington and on Vancouver Island, British Columbia, intergrade with S. idahoense var. segetum. Sisyrinchium littorale, however, has larger capsules and wider stems and leaves.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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