Fragaria vesca ‘Golden Alexandria’ – This alpine strawberry does not produce any runners but the golden foliage is beautiful when used to edge a garden. It bears white flowers followed by small yet flavorful (with a hint of bubblegum) strawberries and is semi-evergreen in mild climates. Everbearing. Prefers part to full sun. Grows 6″ high by 12″ wide. Hardy to zone 4.
Bergenia cordifolia – Pig-Squeak is an evergreen perennial with large rounded glossy green leaves that often shift to reddish-purple tones in colder weather. It features an impressive display of bright magenta-pink flowers (held on short stems) that rise above the foliage in early spring. Tolerates part to full sun. Good cut flower. Grows 12″ high by 18″ wide. Hardy to zone 4.
Schleranthus uniflorus – A newly introduced evergreen perennial from New Zealand, commonly known as Knawel Cushion. It forms tufts of fine green leaves and grows well between rock crevices, producing insignificant greenish-white flowers in summer. Prefers part to full sun and requires near perfect winter drainage to survive. Grows 2″ high and 12″ wide. Hardy to zone 7.
Viola labradorica (syn. Viola adunca var. minor) – This semi-evergreen spreading perennial is now known as Viola riviana Purpurea Group. It features bronze-purple tinted heart-shaped green leaves that are nicely contrasted by pale violet flowers from April to June. Best grown in part sun. Self-seeds. Grows 3″ high with an indefinite spread. Hardy to zone 3.
Cotoneaster microphyllus var. thymifolius (syn. C. linearifolius, ‘Thymifolius’) – A miniature evergreen Cotoneaster with tiny 1/4″ long leaves on fine branches that somewhat resemble Thyme. It bears small white flowers emerging from pink buds in early summer followed by equally tiny 1/8 to 1/4″ red berries. Needs pruning to keep low. Grows 2-3′ high by 3′ wide. Zone 5.