Weeds
Dodartia orientalis L. - Dodartia Eastern.
Systematic position.
Family Scrophulariaceae Juss., genus Dodartia L.Biological group.
Perennial weed forming rootstocks.Morphology and biology.
Herbaceous hairless plant 15-50 cm high. Root thick with rootstocks. Stem ramified from base. Lower leaves opposite, ovate or oblong; upper leaves linear, lanceolate or reduced, scale-shaped. Flowers on short, erect pedicles with bracts, gathered by 3-7 in loose racemes. Calyx bell-shaped, 5-dentate. Corolla dark-violet or dark-purple, 1.5-2.5 cm in length, with long tube and bilabial bend; upper labium short; lower labium larger, elongated, 3-lobed. Boll bilocular, almost spherical, bulged-in, brown, non-opening, 4-5 mm in diameter. Seeds very small, ovate, slightly 3-edged, brown. Flowering period is May-August.Distribution.
The South of East Europe, Mongolia, Iran, West China; the South of the European part of the former USSR, Crimea, the Caucasus, Western Siberia, Central Asia.Ecology.
Plant is not exacting to the soil, withstanding drought and pickling.Economic significance.
Weed of grain crops, cotton, alfalfa; occurs in waste lands, along roads and irrigation canals. Control measures include correct crop rotation, deep plowing, stubbling, presowing soil cultivation, chemical weeding; well-developed grain crops suppress this weed.Related references:
Keller B.A., Lyubimenko V.N., Maltsev A.I., Fedtshenko B.A., Shishkin B.K., Rodzevich R.Yu., Kamenskii K.V., eds. 1935. Weed plants of the USSR. V. 4. Moscow & Leningrad: AN USSR, 416 p. (in Russian).Nikitin V.V. 1983. Weed plants of the USSR flora. Leningrad: Nauka, 454 p. (in Russian).
Shishkin B.K., Bobrov E.G., eds. 1955. Flora of the USSR. V. 22. Moscow-Leningrad: AN SSSR, 861 p. (in Russian).
Shishkin B.K. ed. 1963. Botanical atlas. Moscow-Leningrad: Izd-vo sel'skokhozyaistvennoi literatury, zhurnalov i plakatov, 504 p. (in Russian).