Editing Roystonea oleracea (section)

===General:===
This monumental and famously magnificent tropical garden and avenue palm is considered the Rolls Royce of the ''Roystonea'' and palm world, certainly the tallest more impressive and attractive of the ''Roystoneas''. With the full slightly rakish shaggy head of delicately balanced long leaves held on or near the horizontal to the crown shaft, wide, shiny, gently drooping, very dark green leaflets arranged in four ranks divided strictly on two planes either side of the rachis, plus the truly massive white towering trunks do all make for something of a tropical spectacle. For the larger garden perhaps where it's size wont out compete any architecture. Certainly widely found in tropical municipal plantings where they impart a formal splendour and drama to much colonial architecture, parks and monuments.  Tolerant of very high winds as the leaves are easily shed so is rarely ever lethally damaged by such. The self shedding/cleaning leaves of this species are drier and much lighter than ''[[Roystonea regia]]'' at time of shed, so present less of a danger to anything underneath, they tend to float rather than plummet in a dead drop.

Hybrids readily occur with other ''Roystoneas'' especially ''R. regia'' in the tropics but primarily on Hawaii where pure specimens even in botanical gardens with the noticeable exception of a pure stand at the Lyon Arboretum are rare. Identifying pure ''R. oleracea'' stands doesn't pose much confusion as together with the sheer height, massive size and incredibly wide base and straight sidedness or absence of a bulge in the trunk, four dark green shiny leaflet ranks arranged strictly and neatly on two planes two either side of the rachis, leaves usually held just on or above the horizontal at least as to not obscure the shaft, make easily identifying characteristics in adult specimens. Generally plumose arrangement of the leaflets and leaves drooping bellow the horizontal indicates a hybrid or another species. In juveniles, seedlings there are only two ranks held neatly either side the rachis in two planes instead of the four ranks two either side of the rachis in mature specimens. The rachis and petiole in juveniles is also dark reddish brown. Juveniles of R. regia have untidy loosely plumose, thin, longer, ribbon like leaflets and an olive green petiole and rachis. Worth sourcing seed from pure wild populations or park avenues of pure Oleracea void of any R. regia nearby in the tropics.
Two world famous avenues of ''R. oleracea'' exist, one in the Rua Jardim Botanico, Rio de Janeiro, Brazil and another in the Ang Mo Kio Town Garden, West, Singapore.
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