Tropical Fish And Supplies - Rotala (Lythraceae, South-East Asia)
AQUARIUM PLANTS Rotala (Lythraceae, South-East Asia) The leaves of these species are reddish in color, especially on the underside, but their shape varies according to the setting. They grow in soft, acid water, under strong lighting, and need plenty of iron. The formation of adventitious roots makes it easy to take cuttings. They can produce a striking visual effect if they are planted in a grove, as they stand out well against green plants. Rotala macrandra The coloring of the giant red rotala varies according to the intensity of the lighting, but, as is name suggests, red usually sets the tone. It grows quite quickly, but pruning encourages the growth of lateral shoots which can be used for cuttings. Size: 30 cm. Rotala rotundifolia The upper face of the leaves of the round-leaf rotalia is green, the lower one a reddish color. When the leaves emerge from the water they turn completely green. It is beautiful in clumps, though you must leave sufficient spaces between the stems when planting. Size: 30 cm. Sagittaria sagittifolia Rotala rotundifolia Sagittaria (Alismataceae, North and South America, and Europe) The leaves of these paludal plants that are above water are arrow-shaped, while the submerged ones take the form of thin ribbons. Take care not to push the rhizome too far into the soil: the plant can be held in place by a curved piece of wire. Vegetative multiplication occurs by means of seedlings formed on a runner, which can took root on their own, or with the help of the aquarist. The runner can then be cut off. Sagittaria graminea There are several varieties of the narrow leaf arrowhead, which differ in the length and width of their leaves. They all prefer moderate lighting, soft or slightly hard water, and an approximately neutral pH. Size: 40 cm. Sagittaria sagittifolia The amphibious arrowhead is quite common in calm waters in Europe, especially in garden ponds, where it resists the winters, although it prefers sunny areas. Size: 40-50 cm in water. Rotala macranda Sagittaria graminea HOW TO DISTINGUISH BETWEEN SAGITTARIAS AND VALLISNERIAS Sagittarias and vallisnerias can be distinguished by the tips of their leaves. Sagittarias The longitudinal veins do not reach the tip. The transversal veins are perpendicular and numerous. Vallisnerias The longitudinal veins reach the tips. Few transversal veins, sometimes at oblique angles.
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