Xingú hairgrass



Eleocharis sp. "montevidensis"
Xingú hairgrass
- Tall plant with fine culms
- Reed-like habit
- No high demands
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Description
This tall rush species with fine culms was already imported to Europe in the 1990s as Eleocharis sp. "Xingu". The trading name suggests that it was originally found in the Rio Xingú area in Brazil, however no exact information about its ecact origin is available. Until now it is not determined to species. It is similar to Eleocharis sp. "montevidensis" but seems to belong to another species.
Under water, the Xingú hairgrass develops 30-50 cm long and at most 1 mm wide, light to medium green culms. It forms tuft-like stands but also underground runners with spaced culms. In the terrestrial form, the culms stay shorter and develop a small, light brown, egg-shaped spikelet on the tip. Black, germinable seeds develop in the spikelets. When emersed plants are set into the water, plantlets may form on the spikelets, similar to Eleocharis vivipara. However, in its submerged form Eleocharis sp. "Xingu" does not form spikelets and young plants on the culm tips.
Good lighting, CO2 supply and nutrient-rich bottom are recommendable, otherwise it has no special demands. According to Dennerle company, its temperature range is 16-28 °C. Newly planted Xingú hairgrass often takes some time to acclimatize and to start to grow. When it grows well, the runners have to be reduced from time to time. We do not recommend to prune too long culms because the cut ends get yellow and unsightly. One should keep in mind the maximum height of the plant before using it for the aquarium design.
As well as Eleocharis sp. "montevidensis", E. sp. "Xingu" has a particular habit that makes it intersting for the aquascaping. It has the appearance of reed or flooded grassland. Sometimes similar Eleocharis stands are shown in underwater shots of natural biotopes in South America. With its height, it looks best in at least 50 cm tall tanks. In lower water, the culms grow out of the water or lay down and float along the surface.
Also for emersed setups, this rush species may be interesting. As terrestrial plant, it forms dense tufts with arching culms.
The exact species of "Giant Hairgrass" has not been identified yet. This plant was brought onto the market in Germany in the 1990s as "Heleocharis xingu". At the moment, only very few aquatic plant nurseries and dealers carry it, which makes it pretty much of a rarity. Its trade name suggests that it was collected somewhere around Rio Xingú in Brazil, however, there is no reliable information as to its exact origins. It might be identical with the aquarium known as Eleocharis montevidensis in the USA.
The light to medium green smooth blades of Eleocharis sp. "Xingú" grow to a length of over 20 cm in the emersed form, and submersed they can get over 50 (-60) cm long. They are around 1 millimetre wide, their cross section is oval flattened. Other than tall hairgrass (E. vivipara), E. sp. "Xingú" does not form plantlets on the blade tips. (read more)
Trader names | Heleocharis xingu |
Family | Cyperaceae |
Genus | Eleocharis |
Difficulty | medium |
Usage | Semi-emersed plant for open tanks, Background, Midground |
Height | 30 - 55cm |
Growth | medium |
pH value | 5 - 7 |
Temperature tolerance | 15 - 30°C |
Carbonate hardness | 0 - 14°dKH |
General hardness | 0 - 30°dGH |
Propagation | Runners, Seeds, Splitting, cutting off daughter plants |
Can grow emersed? | yes |
Source | Flowgrow |
Trader names |
Heleocharis xingu |
Family |
Cyperaceae |
Genus |
Eleocharis |
Difficulty |
medium |
Usage |
Semi-emersed plant for open tanks, Background, Midground |
Height |
30 - 55cm |
Growth |
medium |
pH value |
5 - 7 |
Temperature tolerance |
15 - 30°C |
Carbonate hardness |
0 - 14°dKH |
General hardness |
0 - 30°dGH |
Propagation |
Runners, Seeds, Splitting, cutting off daughter plants |
Can grow emersed? |
yes |
Source |
Flowgrow |
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