西藏鸢尾 xi zang yuan wei

Iris himalaica Dykes.

Rhizomes creeping, cylindric. Leaves grayish green and dull on 1 surface, glossy on other, sword-shaped, 30--60 × 0.8--1.8 cm. Flowering stems 2- or 3-branched, 45--90 cm × ca. 5 mm, solid, 2- or 3-leaved; spathes 3, green, broadly lanceolate, 7.5--9 cm, (1 or)2-flowered. Flowers bluish violet, 7.5--8.5 cm in diam.; pedicel slender, 2.5--3.5 cm. Perianth tube green, ca. 1 cm × 5 mm; outer segments mottled darker on central, whitish patch, obovate, ca. 7 × 2.4--2.8 cm; inner segments obliquely spreading, pale violet, oblanceolate, 4--4.5 × ca. 1 cm. Anthers milky white. Style branches 4--4.5 cm × ca. 5 mm. Capsule oblong-ellipsoid, 3.5--5 × 1.2--2.5 cm, 3-angled, 6-veined. Seeds semiorbicular, flat. Fl. Jun--Jul, fr. Aug--Sep. 2 n = 40.

Damp places near streams and lakes; 2300--4300 m. Xizang, W Yunnan [Bhutan, NE India, Myanmar, Nepal, Sikkim].