Orobanche kotschyi Reut.

Parasitic on species of the Apiaceae.

It is not clear if Orobanche gigantea should be reduced to the synonymy of O. kotschyi.

Biennial or perennial, up to 60 cm tall, stout, usually with more than 10 mm thick stem, densely pilose; scales oblong-lanceolate, distant, c. 10 (-15)mm long. Spikes dense. Bracts c. as long as the corolla-tube or slightly shorter, often c. 15 mm long; bracteoles absent. Calyx c. as long as the bracts, divided into 2 segments, each segment deeply 2-fid to below middle, teeth linear. Corolla (20-) 25-30 (-35)mm long, tube constricted in the middle or at the insertion point of stamens, inflated below; limb broad with spreading, obtuse lobes, blue. Filaments and anthers minutely pubescent or sub-glabrous. Capsules c. 10 mm long, ovoid. Stigma 2-lobed.

Herbs biennial or perennial, 30-60 cm tall, densely white villous. Stems erect. Leaves lanceolate, 1-1.5 cm X ca. 5 mm, upper ones densely white villous. Inflorescences spicate, 10-20 cm; bract lanceolate, 1.5-2 cm, apex acuminate, along with calyx densely white villous; bractlets absent. Calyx 1-1.2 cm, 2-parted to base; segments 2-lobed halfway; lobes linear-lanceolate, 5-7 mm. Corolla pale yellow or ?blue-purple, 2-2.5 cm; tube slightly enlarged, middle part distinctly constricted, enlarged and strongly curved upward, sparsely pubescent abaxially, glabrescent adaxially; upper lip entire or emarginate; lobes elliptic, subequal, margin sinuate or dentate. Filaments 1-1.2 cm, base pubescent; anthers oblong, 1.8-2 mm, densely white villous. Ovary oblong-ellipsoid. Style 1.2-1.4 cm, sparsely pubescent or glabrous; stigma 2-lobed. Capsule oblong, 1-1.4 cm. Seeds ovoid-ellipsoid, 0.3-0.5 mm. Fl. May-Jul, fr. Jul-Sep.

Distribution: Pakistan, Afghanistan, Iran, Iraq, Pamir-Alai, Armenia, Kurdistan to Turcomania.

N Xinjiang [Afghanistan, Kazakhstan, Kyrgyzstan, Pakistan, Tajikistan, Turkmenistan, Uzbekistan; SW Asia].

Slopes; ca. 600 m.

Orobanche gigantea (Beck) Gontsch; O. kotschyi Reuter var. gigantea Beck.

Orobanche kotschyi là loài thực vật có hoa thuộc họ Cỏ chổi. Loài này được Reut. mô tả khoa học đầu tiên năm 1847.

缢筒列当（学名：Orobanche kotschyi）为列当科列当属下的一个种。