Amphibian perennial with long creeping rhizome, which has two forms - the water, floating on the water, and land. Aqueous form has long stem, long-stemmed leaves floating, shiny, oblong, acute or obtuse, base rounded or cordate, naked blades 5-17 cm long and 1-5 cm wide, sometimes the ends of shoots and leaves rise above the water. In terrestrial forms of stem up to 70 cm, simple, ascending or erect, leaves with petioles up to 1 cm, plate lanceolate, 5-15 cm long and 1-4 cm wide, hairy on both sides, sharp. Inflorescence - spike-end dense brush length of 3-4 cm Perianth pink. Stamens 5, rarely Read more [...]
Annual grayish-woolly-felt, plant height 10-20 cm stem is erect, slender, simple or forked. The leaves are alternate, lanceolate, entire, appressed to the stem, to 10 mm long and 1 mm wide. Numerous small (up to 3 mm in length and about 2 mm wide) ovoid baskets crammed by 2-5 in the head (sometimes single basket), forming a total apical spicate inflorescence. Wrap a two-or three-row, outer leaves it among 6-13, keeled, lanceolate or ovate, obtuse, 2.5-3 mm long and 0.5 mm wide, in the middle of the grass at the edges scarious, straw yellow, at the base of the back with a thick felt-pressed hairs, Read more [...]
Perennial with slender branching underground rhizomes and numerous adventitious roots. Stems (7) 12-30 cm tall, finely ribbed, sometimes slightly twisted. Leaves collected in the rosette or more spread, and their records or broadly ovate, 2.5-6 cm long and 1-5 cm wide, stiff, dull, margin faintly crenate-serrate. The flowers are drooping, on peduncles 12-30 cm long by 7-20 collected in rather dense brush 2-8,5 cm long with five calyx broadly triangular or broadly ovate lobes pointed or blunt share, at the base covering the edges of each other, pressed to the rim. Corolla white or slightly pink, Read more [...]
Korotkokornevischny perennial with long, ascending or prostrate stems up to 150 cm, pubescent with short hairs. The leaves are ovate, 2-9 cm long and 1-3 cm wide, with short petioles. The flowers sit in the leaf axils in sparse leafy inflorescences, bisexual, drooping. Calyx gamophyllous, korotkokolokolchataya, 8-15 mm long and 4-6 mm wide, with five large teeth, yellowish-green, with fruits inflated. Petals five, they are greenish-white, narrow, two-lobed. Stamens ten. Fruit - a shiny, black, dry berry. Blooms from June to August, fruiting in July-September.
European-South Asian species, Read more [...]
Green perennial herb 30-160 cm tall with one or more simple erect stems. Leaves lanceolate, entire, toothed on the edges, pubescent (especially their lower side), with dark punctate glands on both sides of the leaf blade. Baskets are usually numerous, poluyaytsevidnye, 4-5.5 mm long and 3.5-5 mm wide, gathered at the tops of the stems in corymbose inflorescence. Wrap imbricate, three-row, wrap the leaves are 2-3 mm long and 1.5 mm wide, broadly, yellowish-green, with prominent midrib, margin membranous, yellow or yellow with a brown border. All the flowers in a basket white, edge - lozhnoyazychkovye, Read more [...]