Iris verna |
Iris orientalis |
|||||
---|---|---|---|---|---|---|
dwarf violet iris |
yellowband iris |
|||||
Rhizomes | heterogeneous, whitish, cordlike portions 0.1–1.5 dm × 2–4 mm, enlarging to 6–8 mm diam., densely covered with brown, scalelike leaves, roots absent, or torulose with roots borne along entire rhizome. |
sparingly short-branched, forming dense clumps, 1–1.5 cm diam., hard, with old leaf bases at nodes; roots fleshy. |
||||
Stems | simple, 5–15 cm. |
slightly flattened, with 1–2 short branches, solid, 4–12 dm. |
||||
Leaves | basal with blade light green, ensiform, 0.3–1.5 dm × 0.3–1.3 cm, enlarging to 3.5 dm, glaucous; cauline 5–9, sheathing, imbricate, blade light green, obovate, 1.3–5 cm, increasing in length, proximal shortest, membranous, apex acute. |
basal erect, blade with slight spiral twist and central ridge, 3.5–8 dm × 1–2 cm, stiff, harsh, fibrous, glaucous; cauline 2–3, 1–2 subtending floral clusters, blade reduced. |
||||
Inflorescence units | 1–2-flowered; spathes divergent, exposing floral tube, green, lanceolate, 2–2.5 cm, apex acuminate. |
clustered, 2–4-flowered; spathes white, 3–5 cm, subequal, papery. |
||||
Flowers | floral tube pale violet, filiform, 2.5–6.5 cm, expanding somewhat distally to 2.5–4 cm diam.; sepals widely spreading, blue to violet with yellow or orange longitudinal papillose band at base of blade, obovate, 2–6 × 0.8–2 cm, base gradually attenuate into claw, not crested; petals erect, arching inward at tip, spatulate, 2–7 × 1–2 cm, base abruptly attenuate into claw; ovary linear, to 1.3 cm; styles pale violet, 2.5–4 cm, crests linear-acute, narrow, 0.7 cm; stigmas rounded, margins entire; pedicel 1–3 cm, increasing to 25 cm as capsule matures. |
perianth white; floral tube funnelform, 1–2.5 cm; sepals spreading and arching downward, with large yellow basal area, broadly orbicular, 8–10 × 3–6 cm, apex rounded, deeply emarginate; petals white, spatulate, 4–6 × 1–1.5 cm, base gradually attenuate, apex emarginate; ovary triangular in cross section with 2 ribs at each angle, 2–2.5 cm; style white, with parallel sides, 4–5 cm, crests erect, triangular, 1–2 cm; stigmas 2-lobed; pedicel 2.5–7.5 cm. |
||||
Capsules | 3-angled with single ridge at each angle, almost hidden in bases of spathes, 1–3.2 × 0.8–1.5 cm, tapering into beak consisting of dried remnant of floral tube. |
ovoid to oblong-elliptic, triangular in cross section, each angle 2-ribbed, 4–5 × 2–2.5 cm. |
||||
Seeds | dark brown, ribbed, 2.8–3.2 mm, lustrous, with small, fleshy aril basally. |
in 2 rows per locule, white, flattened or wedge-shaped, 4–5 mm, papery, wrinkled. |
||||
2n | = 40. |
|||||
Iris verna |
Iris orientalis |
|||||
Phenology | Flowering May–Jul. | |||||
Habitat | Persisting after cultivation or discarded along roadsides | |||||
Distribution |
se United States
|
CA; CT; MO; expected elsewhere; Greece; Turkey [Introduced in North America] |
||||
Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|||||
Key |
|
|||||
Source | FNA vol. 26, p. 379. | FNA vol. 26, p. 394. | ||||
Parent taxa | Iridaceae > Iris > subg. Limniris > sect. Limniris > ser. Vernae | Iridaceae > Iris > subg. Limniris > sect. Limniris > ser. Spuriae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Neubeckia verna | |||||
Name authority | Linnaeus: Sp. Pl. 1: 39. (1753) | Miller: Gard. Dict. ed. 8, Iris no. 9. (1768) | ||||
Web links |