Sisyrinchium angustifolium
Sisyrinchium minus
Bermudienne à feuilles étroites, blue-eyed grass, narrow-leaf blue-eyed-grass, stout blue-eyed grass
dwarf 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 3–6 nodes, 0.5–2.1 mm wide, glabrous, margins entire, similar in color and texture to stem body;
first internode 1–4 cm, shorter than leaves;
distalmost node with 1–2 branches.
blades glabrous, bases not persistent in fibrous tufts.
blades glabrous, bases not persistent in fibrous 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 green, wider than supporting branch, glabrous, keels denticulate;
outer 10.6–31 mm, 6–11 mm longer than inner, constricted proximal to apex, margins basally connate 2.7–4.7 mm;
inner with keel evenly curved to straight, hyaline margins 0.2–0.5 mm wide, apex acute, ending 1.1–5.4 mm proximal to green apex.
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.
perianth flaring distally, campanulate basally;
tepals lavender-pink to rosy purple, magenta, or white, very rarely yellow or bluish, bases yellow;
outer tepals 5–6.3 mm, apex rounded to acute or slightly emarginate, aristate;
filaments connate ± entirely, tapering evenly, basally stipitate-glandular 0.8–1.2 mm;
ovary similar in color to foliage.
dark brown or black, sometimes with purplish tinge, ± globose, 4–7 mm;
pedicel spreading or ascending.
light brown, turbinate to broadly fusiform, 3.8–5.6 mm;
pedicel recurved to pendent.
globose to obconic, lacking obvious depression, 0.5–1.2 mm, rugulose.
± globose, with slight depression on one side, 0.5–0.8 mm, rugulose.
= 96.
= 10.
Sisyrinchium angustifolium
Sisyrinchium minus
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.)
Morphologically Sisyrinchium minus appears closely related to and may even be conspecific with S. tinctorium of Mexico, but further study is needed for resolution.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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