Aquarium Plants - Eleocharis
AQUARIUM PLANTS Eleocharis (Cyperaceae, tropical regions) These plants, resembling tufts of grass, live in swamps, and are therefore suited to aquaterrariums, although they can also be cultivated in aquariums under strong lighting, in hard, alkaline water. Eleocharis minima When the stems of the spiked rush reach the surface, they spread out and do not emerge above it. Vegetative multiplication occurs with the help of runners or the division of a clump. Size: 20-30 cm. Heteranthera (Pontederiaceae, Central or South America) These plants are totally aquatic, requiring intense light and a fairly rich soil. They are sensitive to any deficiency in iron. The water must be slightly alkaline and moderately hard. Heteranthera dubia The yellow-flowered heteranthera can be reproduced with cuttings, a process that is facilitated by adventitious roots on the stem. The stem is quite fine and can float on the surface of the water. Size: 40 cm. Heteranthera zosterifolia The stargrass can live totally submerged. It multiplies through cuttings of the side shoots; it can also grow as a creeper. Size: 30 cm. Hygrophila guianensis Hygrophila (Acanthaceae, South-East Asia) More than 10 species are found in the aquarium trade, although the existence of different varieties and the modifications made to scientific names can lead to confusion. They live half-submerged, but can tolerate immersion in a moderately hard acid or neutral water. They need intense light to grow well, and should be planted in groups, but with sufficient spaces between the stems. It is easy to take cuttings: just chop off the head of the stem as soon as it reaches the surface. Hygrophila corymbosa (formerly Nomaphila) The giant hygro tolerates temperatures as low as 15 C. The presence of adventitious roots is an advantage when taking cuttings. Size: 30 cm. Hygrophila guianensis (formerly H. salicifolia) The willow leaf hygro, recognizable by an almost square stem, is sensitive to excessively hard water or a lack of iron. When the light is insufficient, the leaves at the bottom of the stem fall off. Size: 30 cm. Hygrophila difformis (formerly Synnema triflorum) Considered a weed in its native region, the water wisteria is prized by aquarists for its pale color and finely serrated leaves, although when these first appear their form is less delicate. This plant tolerates fairly wide ranges of hardness and pH. When the leaves drop off the stem, young shoots appear in their place. Size: 30 cm. Eleocharis vivapara, a species closely related to Eleocharis minima Hygrophila difformis Hygrophila corymbosa
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