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Myrmecodia armata

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Found this plant at Kakteen Haage.

Author:  Augustin Pyramus de Candolle, 1830
Family:  RUBIACEAE
Origin:  Southern Asia
Soil:  No; Epiphytic
Water:  Medium
Sun:  Medium-Maximum
Thickness:  15 centimetres
Height:  25 centimetres
Flower:  White
Propagate:  Seeds
Names:  Ant Plant, Ameisenknolle. 
Synonyms:  Myrmecodia tuberosa, Jack, 1825. Lasiostoma tuberosum, Sprengel, 1825
This member of the Rubiaceae family was given this name by Augustin Pyramus de Candolle in 1830. It is found in Malaya, Southern Asia, growing on the trees on the savannah. Some water and some to lots of sun, and it will grow to 25 centimetres in height, with a caudex on 15 centimetres. The flowers are small and white, and seeds are the only way of reproducing.

The genera name means 'ant head'. The species name for the spines.

The caudex is hollow, and host ants. Those ants isn't aggressive, and do little to defend the plant. The might just bring nutrients to it. On the other hand, the plant does not feed them like other Rubiaceaes.

A key to the genera of the HYDNOPHYTTNAE is found on the Myrmecodia alata page.