hi

Geranium sanguineum 'Striatum' aka 'Lancastriense' has pink flowers with red veins.

As for small plants there are G. sanguineum 'Nanum' aka 'Little Bead' and a G. sanguineum 'Minutum' aka 'Droplet' with reddish purple flowers. Both are small plants. I cant find any reference to G. sanguineum

G. sanguineum are all small. I don't think I've ever seen one more than a foot tall, although they do spread quite wide in time.

Compactum seems to be only referenced in Europe, it may be a synonym of another cultivar but I can't find anything to show this.