Iris pseudacorus |
Iris prismatica |
|
---|---|---|
fleur-de-lis, horticultural iris, iris jaune, pale-yellow iris, yellow flag, yellow iris, yellow water iris |
slender blue iris |
|
Rhizomes | pink, freely branching, producing extensive clumps, 2–3 cm diam., with fibrous remains of old leaves; roots fleshy. |
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 | usually 1-branched, solid, 7–15 dm. |
simple or 1–2-branched, 3–8 dm. |
Leaves | basal deciduous, at first erect, then recurved, blade dark green, with prominent median thickening, 4–10 dm × 2–3 cm, slightly glaucous basally; cauline equaling inflorescence unit. |
basal with blade slightly ribbed, 3–6 dm × 0.2–0.5 cm; cauline 1–4, erect. |
Inflorescence units | 4–12-flowered; spathes green with brown margins, outer spathe strongly keeled, inner without keel, 6–9 cm, subequal, margins not scarious. |
1–3-flowered, branch units 1–2-flowered; spathes pale brown, narrowly lanceolate, 2–4 cm, scarious or partially membranaceous. |
Flowers | perianth bright yellow; floral tube 0.6–0.8 cm, with no constriction into ovary; sepals bright yellow or cream colored, lanceolate to ovate or suborbiculate, 5–7.5 × 3–4 cm, base abruptly attenuate, claw ca. 1/2 length of limb, signal a darker yellow basal patch limited by short, brown lines; petals without veining, lanceolate to spatulate, 2–3 cm; ovary triangular in cross section with concave sides and narrow groove at each angle, 1.5 cm; style keeled, 3–4 cm, crests spreading, 1–1.2 cm, laciniate at apex; stigmas rounded with prominent tongue; pedicel 2.5–7 cm. |
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 | prismatic to oblong-ovoid, obscurely 3-angled with obvious groove at each angle, 3.5–6 cm, beak 5 mm. |
sharply 3-angled, almost winged, 3–4 × 1.2–1.4 cm, concave faces 6–14 mm wide. |
Seeds | D-shaped, flattened, 6–7 mm, corky, lustrous. |
in 1 row per locule, buff to dark brown, pyriform, with convex sides, 3–4 mm, smooth. |
2n | = 34. |
= 42. |
Iris pseudacorus |
Iris prismatica |
|
Phenology | Flowering Apr–Jun. | Flowering Apr–Jul. |
Habitat | Swamps, wet shores of rivers and lakes | Swampy, peaty soil |
Distribution |
AL; AR; CA; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; ME; MS; NC; NH; NY; OH; PA; RI; SC; TN; VA; WA; WV; BC; MB; NB; NF; NS; ON; PE; QC; Eurasia; n Africa [Introduced in North America]
|
AL; CT; DE; GA; KY; MA; MD; ME; NC; NH; NJ; NY; RI; SC; TN; VA
|
Source | FNA vol. 26, p. 390. | FNA vol. 26, p. 395. |
Parent taxa | Iridaceae > Iris > subg. Limniris > sect. Limniris > ser. Laevigatae | Iridaceae > Iris > subg. Limniris > sect. Limniris > ser. Prisimaticae |
Sibling taxa | ||
Name authority | Linnaeus: Sp. Pl. 1: 38. (1753) | Pursh: Fl. Amer. Sept. 1: 30. (1814) |
Web links |
|