The heavenly blue morning-glory has beautiful blue flowers, which has made it rather popular.  Unfortunately it is also an invasive weed.  I was not aware of that when I allowed it in my yard.  To keep it under control in a garden requires a good deal of work.  And it escapes easily.

The flowers are blue in the morning, fade to red later in the day, and by evening they are curled up.  Of course, that's why they are called morning glories.  This plant is also known as the grannyvine.

The heavenly blue is spectacular when massed, as on this wall. Because of its twining stems, the vine climbes almost anything.  Sometimes strangling the plants it climbs.  It also sends runners along the ground, putting down roots as they go.

Most of the leaves are heart shapped, but some are lobed, usualy three lobes.

The heavenly blue is a perennial, though the vines die back each year.  This results in heavy, dense masses of old stems and leaves.  Here I have cut away part of such a mass that was on the top of the trellis.

This part of the large root system of the vine which grows from year to year .

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