Comments
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White-flowered plants have been recognized as Iris tectorum f. alba (Dykes) Makino (Ill. Fl. Nipp. 714. 1940, based on I. tectorum var. alba Dykes, Gen. Iris, 103. 1913). The native distribution and ecology of I. tectorum are uncertain because the species is very widely cultivated and naturalized in China. It is also cultivated in Bhutan (where it has become naturalized), and India.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
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Rhizomes creeping, thick. Roots slender. Leaves mainly in basal fans, yellowish green, broadly sword-shaped, curved, 15--50 × 1.5--3.5 cm, base surrounded by fibers. Flowering stems 1- or 2-branched, 20--40 cm, 1- or 2-leaved; spathes 2 or 3, green, lanceolate, 3.5--7.5 × 2--2.5 cm, 1- or 2-flowered, apex acuminate. Flowers bluish violet, ca. 10 cm in diam.; pedicel to 1 cm. Perianth tube slender, to 3 cm; outer segments mottled darker around conspicuous, white, irregularly toothed crest, broadly ovate, 5--7 × ca. 4 cm, apex retuse; inner segments spreading horizontally at anthesis, elliptic, 4.5--5 × ca. 3 cm. Stamens ca. 2.5 cm; anthers bright yellow. Ovary cylindric, 1.8--2 cm. Style branches pale bluish violet, ca. 3.5 cm. Capsule ellipsoid or obovoid, 4.5--6 × 2--2.5 cm. Seeds black-brown, pyriform, with very small aril. Fl. Apr--May, fr. Jun--Aug. 2 n = 24, 28, 32.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Distribution
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Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Hunan, Jiangsu, Jiangxi, Qinghai, Shaanxi, Shanxi, Sichuan, Xizang, Yunnan, Zhejiang [Japan, Korea, ?Myanmar].
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Habitat
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Forest margins, sunny banks, meadows, damp places, beside water; 500--3500 m.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
provided by eFloras
Iris chinensis Bunge (1833), not Curtis (1797); I. rosthornii Diels.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA