Iris prismatica

Pursh

Fl. Amer. Sept. 1: 30. 1814.

Common names: Slender blue iris
Treatment appears in FNA Volume 26. Treatment on page 395. Mentioned on page 373.
Revision as of 19:33, 24 September 2019 by FNA>Volume Importer

Rhizomes superficial or only slightly buried in peaty soil, cordlike portions usually 1-branched, 40 cm × 2–5 mm, bearing scalelike leaves at nodes; nodal roots absent. Stems simple or 1–2-branched, 3–8 dm. Leaves: basal with blade slightly ribbed, 3–6 dm × 0.2–0.5 cm; cauline 1–4, erect. Inflorescence units 1–3-flowered, branch units 1–2-flowered; spathes pale brown, narrowly lanceolate, 2–4 cm, scarious or partially membranaceous. Flowers: perianth pale blue or blue-violet; floral tube 0.2–0.3 cm; sepals pale violet, veined deep violet basally, ovate, 4–5 × 1.3–2 cm, base abruptly attenuate; petals lavender, oblanceolate, 3.5–4.5 × 0.7–1.5 cm; ovary trigonal, sharply angled; style arched, narrow, 2–3 cm, crests divergent, quadrate, 0.5–0.7 cm, margins serrate; stigmas sharply triangular; pedicel somewhat flattened, 3–7 cm, exserted from spathe. Capsules sharply 3-angled, almost winged, 3–4 × 1.2–1.4 cm, concave faces 6–14 mm wide. Seeds in 1 row per locule, buff to dark brown, pyriform, with convex sides, 3–4 mm, smooth. 2n = 42.


Phenology: Flowering Apr–Jul.
Habitat: Swampy, peaty soil

Distribution

V26 810-distribution-map.jpg

Ala., Conn., Del., Ga., Ky., Maine, Md., Mass., N.H., N.J., N.Y., N.C., R.I., S.C., Tenn., Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Iris prismatica"
Norlan C. Henderson +
Prismaticae +
Slender blue iris +
Ala. +, Conn. +, Del. +, Ga. +, Ky. +, Maine +, Md. +, Mass. +, N.H. +, N.J. +, N.Y. +, N.C. +, R.I. +, S.C. +, Tenn. +  and Va. +
Swampy, peaty soil +
Flowering Apr–Jul. +
Fl. Amer. Sept. +
Undefined subg. Limniris +
Iris prismatica +
Iris (sect. Limniris) ser. Prisimaticae +
species +