Why do mountain grass seedlings start to grow on the parent plant?

Why do mountain grass seedlings start to grow on the parent plant?Why do mountain grass seedlings start to grow on the parent plant?
it is a more efficient way of ensuring the specie survives.


seed (very plant expensive to produce) would mainly not find a suitable place or the right weather conditions to germinate.


the shoot(runner) on the other hand as the parent plants support till it roots and reaches adult hood,


hope this helps


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