Sisyrinchium angustifolium
Sisyrinchium nashii
Bermudienne à feuilles étroites, blue-eyed grass, narrow-leaf blue-eyed-grass, stout blue-eyed grass
Nash's blue-eyed grass
branched, with 1–2 nodes, 2.3–5 mm wide, glabrous, margins often minutely denticulate especially basally, similar in color and texture to stem body;
first internode 10–30 cm, usually longer than leaves;
distalmost node with 1–3 branches.
branched, with 1–2 nodes, 2.3–4.4 mm wide, glabrous, margins often denticulate apically, similar in color and texture to stem body;
first internode 12–30 cm, longer than leaves;
distalmost node with 2–3 branches.
blades glabrous, bases not persistent in fibrous tufts.
blades glabrous, bases becoming fibrous, persisting in tufts.
borne singly;
spathes usually green, obviously wider than supporting branch, glabrous, keels denticulate to entire;
outer 18–38 mm, 2–9.5 mm longer than inner, usually tapering evenly towards apex, margins basally connate 4–6 mm;
inner with keel evenly curved or straight, hyaline margins 0.1–0.3 mm wide, apex acuminate to acute, ending 0.2–0.7 mm proximal to green apex.
borne singly;
spathes with purplish tinge along hyaline margins, obviously wider than supporting branch, glabrous, keels usually entire;
outer 18–25.5 mm, 1 mm shorter to 55 mm longer than inner, tapering evenly towards apex, margins basally connate 2–3.8 mm;
inner with keel straight, hyaline margins 0.3–0.5 mm wide, apex obtuse to truncate, ending at green apex or occasionally extending beyond as 2 obtuse or truncate lobes.
tepals pale blue to violet, occasionally white, bases yellow;
outer tepals 7.7–12.5 mm, apex rounded or emarginate, aristate;
filaments connate ± entirely, stipitate-glandular basally;
ovary similar in color to foliage.
tepals blue to light blue or light purple, bases yellow;
outer tepals 7.2–12.5 mm, apex rounded to emarginate, aristate;
filaments connate ± entirely, slightly stipitate-glandular basally;
ovary similar in color to foliage.
dark brown or black, sometimes with purplish tinge, ± globose, 4–7 mm;
pedicel spreading or ascending.
tan to beige, ± globose to ± obovoid, 2.5–4.8 mm;
pedicel ascending to erect.
globose to obconic, lacking obvious depression, 0.5–1.2 mm, rugulose.
globose to obconic, lacking obvious depression, 1–1.2 mm, rugulose.
= 96.
= 16.
Sisyrinchium angustifolium
Sisyrinchium nashii
Sisyrinchium membranaceum E. P. Bicknell probably belongs here; Bicknell indicated that its relationship was “with S. graminoides” and his description falls within that of S. angustifolium, except for slightly shorter spathe bracts.
In previous floras, Sisyrinchium angustifolium often has been confused with S. montanum, especially when S. graminoides was segregated. Branching seems to be the primary point of confusion. The original descriptions of S. angustifolium and S. graminoides clearly indicated branching while that of S. montanum indicates it to be single-stemmed. There is some slight similarity between S. montanum var. crebrum and S. angustifolium with respect to spathe connation and dry color, and chromosome counts indicate that both have 2n = 96, but there is some indication that breeding barriers may exist (D. B. Ward 1959).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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