Authors: Nutt.   Rydb.  

Botanical Description

Spiraea caespitosum). Mat-forming, to 20cm across in about ten years (to 80cm in the wild). Leaves rosetted towards the stem tips, spathulate, 5-12mm long, one-veined, densely silky downy. Racemes 2-4cm long, above the leaves, the flowers white with up to twenty stamens, early to late summer. Oregon to California, east to South Dakota and Texas, in rock crevices and slopes mainly in pine-juniper woodland, up to 3000m in California.