Geranium macrostylum. This cranesbill is a spring specialist, running underground with small tubers and sending up delicate mats of foliage topped with veined lilac blue flowers in Spring. The foliage disappears by summer, rather in the manner of a spring bulb. Use it at the front of a border where larger plants can flop over the bare soil later in the year or in an area that becomes dry in summer. May 30cm. Native of the Mediterranean and East to Iran.