GERANIUM if you are looking for Pelargoniums, whose common name is Geranium click here

GERANIUM. Crane’s bill. Worldwide, temperate regions. This group is a good indicator of recent enthusiasm for flowering perennials. Not long ago, even reputable horticulturists used the name primarily to refer to the related genus Pelargonium, from southern Africa. Now there are dozens of species and hybrids of true Geranium, recognized and sought out enthusiastically by gardeners. These are mostly smaller, slender stemmed perennials with rounded, often dissected leaves and–unlike the pelargoniums—regular (wheel shaped) flowers. Colors include some vivid purples and blues and wild magentas, as well as more subtle shades. They have a variety of uses in the border, for small-scale ground cover and for containers and rock gardens, according to size and shape. Most are easily grown in sun or light shade and most soils, with moderate to regular watering. A few are even fairly drought tolerant, as described below. Hardy at least to 10^oF (often 0^o) except as shown.

sanguineum. A trailing plant, about 6" high by perhaps 2’ broad in the plants we grow. It has attractive dark green, sharply lobed leaves, tinged with red in fall, and produces purplish-red 1½" blossoms throughout the summer months.  ‘John Eisley’ is a selected form making a particularly low, dense mat. It produces a wealth of dark flowers. The variety striatum (aka lancastriense) is quite prostrate and relatively slow growing. It has pink flowers with darker veins.‘Album’ is a little larger and looser in habit than most. The flowers are also larger, and colored snow white with fine reddish veins.