Weeds
Commelina communis L. - Common commelina, blue-eyed grass.
Classification.
Family Commelinaceae R.Br., genus Commelina L.Morphology and biology.
Annual herbaceous plant. Stem erect or rising (15-40 cm), branchy, glabrous. Leaves egg-shaped, lanceolate (2-8 cm), pointed, with wide membraneous sheath, covered by thin short hairs, mainly on the lower side. Inflorescences on thin peduncles located in the upper leaf axils. Sepals greenish, membraneous, egg-shaped (2 spliced at the base). Corolla is composed of 3 different petals: two are large, dark blue, obovate egg-shaped, uninoculated in root, third is smaller, obovate-lanceolate, pallid; stamens 3, staminodes 3, pistil with 3-nidus ovary.Distribution.
European part of the former USSR (alien), Caucasus (alien), west and east Siberia (alien), the Far East.Ecology.
On rocks, dry slopes of mountains, on river banks; as a weed in fields and kitchen gardens.Economic value.
Used for food as a vegetable in China. Control measures: pre-sowing tillage after spring sprouting.Reference citations:
Komarov V.L., ed. 1935. Flora of the USSR. Moscow-Leningrad: Publishing House Acad. Sci. USSR. V. 3: 501.Nikitin V.V. 1983. Weed plants of the USSR flora. Leningrad: Nauka. 454 p.
Ul'yanova T.N. 1998. Weeds in the flora of Russia and other CIS countries. St. Petersburg: VIR. 343 p.