Sisyrinchium demissum


Pittonia 2: 69. 1890.

Synonyms: Sisyrinchium amethystinum E. P. Bicknell Sisyrinchium demissum var. amethystinum (E. P. Bicknell) Kearney & Peebles Sisyrinchium longipedunculatum
Treatment appears in FNA Volume 26. Treatment on page 365. Mentioned on page 355, 362, 363.
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Herbs, perennial, cespitose, light green to olive when dry, to 5 dm, often somewhat glaucous. Stems branched, with 1 or 2 nodes, 1–2(–2.3) mm wide, glabrous, margins entire to denticulate apically, occasionally white-cartilaginous; first internode 8–34 cm, usually longer than leaves; distalmost node with 2–3 branches. Leaf blades glabrous, bases not persistent in fibrous tufts. Inflorescences borne singly; spathes green, obviously wider than supporting branch, glabrous, keels entire to denticulate; outer 11–26 mm, 2.5 mm shorter to 5 mm longer than inner, tapering evenly towards apex, margins basally connate 3.3–8 mm; inner with keel evenly curved to straight, hyaline margins 0.2–0.4 mm wide, apex acute to acuminate, ending 0.1–1.1 mm proximal to green apex. Flowers: tepals dark bluish violet, bases yellow; outer tepals 6–15 mm, apex rounded to acute or occasionally emarginate, aristate; filaments connate ± entirely, stipitate-glandular basally; ovary similar in color to foliage. Capsules beige to tan, globose, 4–7.5+ mm; pedicel erect to ascending. Seeds globose to obconic, lacking obvious depression, 0.8–2 mm, granular or slightly rugulose. 2n = 32, 64.

Phenology: Flowering mid spring–early fall.
Habitat: Moist areas, springs, stream banks, meadows, forest seeps
Elevation: 500–2900 m


V26 742-distribution-map.jpg

Ariz., Colo., Nev., N.Mex., Tex., Utah, n Mexico.


Previously, we (A. F. Cholewa and D. M. Henderson 1984) misidentified the octoploid northern Utah populations of Sisyrinchium demissum as S. radicatum. New data indicate that these northern Utah populations rightly belong here as a polyploid race of S. demissum. Also see discussion under 18. S. radicatum.

Selected References


Lower Taxa

... more about "Sisyrinchium demissum"
Anita F. Cholewa +  and Douglass M. Henderson† +
Greene +
Ariz. +, Colo. +, Nev. +, N.Mex. +, Tex. +, Utah +  and n Mexico. +
500–2900 m +
Moist areas, springs, stream banks, meadows, forest seeps +
Flowering mid spring–early fall. +
Sisyrinchium amethystinum +, Sisyrinchium demissum var. amethystinum +  and Sisyrinchium longipedunculatum +
Sisyrinchium demissum +
Sisyrinchium +
species +