25
Sep
2010
Commelina communis
Flowers | Liliopsida

Scientific Name - Commelina communis L.

Popular names - erba miseria, asiatic dayflower.

Distribution and Habitat - grows naturally in East Asia, prefer shade and moist forests in 0-6000 altit.

Description - annual species, 30-40 cm stem prostrata and zigzag hairy. Leaves alternate, with guaina ± cylindrical, lamina lanceolata, 1-2 x 3-8 cm round basis. Flowers hermaphrodite, zigomorfe, three-apple, surrounded by a shoulder bracteiforma; separator arranged alternate petals green, 2 blue, heart-spatula, and the 3rd lower. Blooms in July-September. Biloculara capsule, elliptic, 5-7 mm. Two seeds in each box, yellow-brown, 2-3 mm long. 2n = 90

Requirements - prefer shady sites with moist soils and rich in humus.

Propagation - by seed or stem cuttings.

Diseases and Pests - Kordyana commelinae, Phyllosticta commelinicola, Physalospora commelinae, Ustilago commelinae, Lema coronata, Aphis commelinae.

Properties and Uses - a cultivated ornamental species, tends to sponteinza in ruderal environments.

Curiosity - can become invasive in NE China, causing serious problems.

Genus name Linne dedicated botanists and Johan Caspar Commelin; 'communis' means 'growing in colonies, groups'.

Commelina genus species is often confused with species of the genus Tradescantia, both belonging to the same family, Commelinaceae. Commelina flowers genre has two large petals and a small petal, flowers from three species of Tradescantia petals are equal in size.

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