Contained within the flora of New Zealand are several genera whose members are true aristocrats of the select group of high alpine cushion-forming plants.
http://www.edgewoodgardens.net/articles/new_zealand_cushion_...

ANDROSACE SARMENTOSA 'CHUMBYI' - ROCK JASMINE
Item# 57759-01
$11.00
11CM:
Product Description
Pink flowers in spring. Sharply-Drained, acidic soil. cushion-forming. Avoid winter wet; do not cut back.
http://yhst-93101459720436.stores.yahoo.net/57759-01.html

Also known as Fall Asters, these are terrific favorites for autumn colour in the perennial border. Plants form bushy mounds, bearing loads of small daisy flowers. This is a medium-height selection with vibrant purple blooms. Pinch plants before July to maintain a cushion effect. Excellent for cutting. Most Asters will be troubled much less with powdery mildew when grown in a moist, rich soil. Divide plants every two to four years to maintain vigour.
http://www.perennials.com/seeplant.html?item=1.085.180