Iris virginica |
Iris chrysophylla |
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iris de virginie, southern blue flag, Virginia iris |
golden leaf iris, slender-tubed iris, yellow-flower iris, yellow-leaf iris |
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Rhizomes | many-branched, forming dense clumps, 2–4 cm diam., usually covered with remnants of old leaves; roots fleshy. |
compact, dark brown, slender, 0.5–0.6 cm diam., covered with old leaf bases; roots few, fibrous. |
Stems | rather weak, often falling over after flowering, solid, usually 1-branched, 5–10 dm. |
simple, solid, slender, 0.25–2 dm. |
Leaves | basal erect or often flexible, blade gray-green to bright green, buff to purplish basally, with several prominent ribs in mature leaves, linear-ensiform, 6–8 dm × 2.5–3 cm, apex acute. |
basal with blade light green, pink or red-tinged basally, finely ribbed, linear-acute, 2.5–5 dm × 0.3–0.5 cm, somewhat glaucous, margins not thickened; cauline 1–3, imbricated, blade bractlike, inflated. |
Inflorescence units | 2–3-flowered, branch units 1–2-flowered; spathes compact, often with brown striations, ridged, unequal, outer 3–8 cm, inner 8–14 cm, firm, herbaceous. |
usually 2–flowered; spathes sometimes flushed pink or purple apically, lanceolate to linear-lanceolate, 5–10 cm × 3–7 mm, unequal, outer much shorter and narrower than inner, herbaceous, margins often scarious, apex acute. |
Flowers | perianth lavender to violet, rarely white; floral tube constricted above ovary, 1–2 cm; sepals spreading and arched, pale blue to purple with darker blue or purple lines, obovate to oval, 4–8.4 × 1.6–4 cm, base abruptly attenuate, claw green in median, bordered by yellow ground with blue or purple lines, yellow extending onto base of limb as finely pubescent signal patch; petals oblong-lanceolate to oblong-spatulate, 3–7 × 1–3 cm, claw greenish yellow with blue or purplish lines, apex often emarginate; ovary trigonal, 1.3–3.8 cm; style inwardly auriculate at convergences, 3–4.5 cm, crests reflexed, 0.7–2 cm; stigmas unlobed, with prominent triangular tongues, margins entire; pedicel 2.5–8 cm. |
perianth cream or very pale yellow, with deeper yellow or lavender veins; floral tube linear, slender, 4.5–12 cm; sepals with bluish tinge and veins, oblanceolate, 4.6–7 × 1–2 cm, base gradually attenuate; petals lanceolate, 3–5.5 × 0.6–1.2 cm, base gradually attenuate, apex emarginate; ovary 1–1.8 cm, base abruptly attenuate into pedicel (when present), apex gradually acuminate into floral tube; style 2–3 cm, crests 1.5–2 cm, sometimes exceeding arms, apex narrowly pointed; stigmas tongue-shaped, margins entire; pedicel absent or 0.5–1 cm at anthesis. |
Capsules | ovoid, ellipsoid, or long-cylindric, trigonal or polygonal in cross section, 3–6 × 1–2 cm. |
sometimes on elongated pedicel, oblong, round in cross section, sharply beaked, 2–3 cm. |
Seeds | in 2 rows per locule, pale brown, usually D-shaped, 5–8 mm, pitted, corky. |
buff, slightly compressed. |
2n | = 70, 72. |
= 40. |
Iris virginica |
Iris chrysophylla |
|
Phenology | Flowering May–Jun. | Flowering Apr–Jun. |
Habitat | Wetlands, margins of lakes and streams | Open, coniferous forests |
Distribution |
AL; AR; DC; FL; GA; IA; IL; IN; KS; KY; LA; MD; MI; MN; MO; MS; NC; NE; NY; OH; OK; PA; SC; TN; TX; VA; WI; WV; ON; QC
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CA; OR
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Discussion | Plants of Iris virginica from the southeastern and south-central states having stems 2–3-branched and seldom falling to the ground after flowering, and with capsules long-cylindric have been recognized as var. shrevei. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Iris chrysophylla hybridizes with I. bracteata, I. douglasiana, I. innominata, I. macrosiphon, I. purdyi, I. tenax, and I. tenuissima. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 390. | FNA vol. 26, p. 386. |
Parent taxa | Iridaceae > Iris > subg. Limniris > sect. Limniris > ser. Laevigatae | Iridaceae > Iris > subg. Limniris > sect. Limniris > ser. Californicae |
Sibling taxa | ||
Synonyms | I. caroliniana, I. georgiana, I. shrevei, I. virginica var. shrevei | |
Name authority | Linnaeus: Sp. Pl. 1: 39. (1753) | Howell: Fl. N. W. Amer., 633. (1902) |
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