Phoenix roebelenii is normally seen in cultivation as a solitary palm. Quite by chance, I encountered clumping P.roebelenii which are said to exist in the wild as clustering palms.After checking, I found Interesting thing that the cultivated forms of P.roebelenii are solitary and have been selected for that way for many dozens of years.True wild forms are rare in cultivation, but they cluster and continue to be this way the whole life, making for a huge shrub.