Although this can be an aggressive plant that tends to take over an area if not kept in control, its beautiful blue blooms are well worth the effort.

It is called the Mexican dayflower, because the bright blue blooms along its two-foot spikes open in early morning and close in the afternoon.

It is common in some areas, covering hillsides with its blue blooms in the spring.

White flowers will look better than, say, red or blue blooms; yellow leaves will be more striking than green foliage.

It is not surprising, either, for this particular annual is bicolored with blue and white blooms on the same stalk.

Low-growing shrubs are covered in yellow and blue blooms.

The garden, described as a stunning blaze of red, white and blue blooms by all that have enjoyed it, helped secure the award.

Very similar to Gentiana clausa, it has paired, lanceolate leaves, usually on unbranched stalks, and blue or purple blooms which remain closed or nearly closed.

Often he stood just looking at the huge blue blooms, wondering what the fruit would be.

It has paired, lanceolate leaves, usually on unbranched stalks, and blue blooms which remain closed or nearly so (thus the Latin specific name).