What abundance is this?

From roses to rose hips,
a single bush
which blesses us with color
throughout the year:
what abundance must abide,
to bring us flowers in the spring
-- bright blush, against lush green --
then keeps them blooming through the fall,
while leaves endure
the harsh task of walking through the rainbow --
now red,
now gold,
now edged with brown --
while each flower shrugs her petals
to reveal a ripe and rosy berry
whose fertile shape and deepening color
give hint of advent's promise;
of Christmas yet to come,
then shrivel into brightness
just in time to feed the birds
throughout the cold dark winter.

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