This section is from the book "Field Book Of Western Wild Flowers", by Margaret Armstrong. Also available from Amazon: Field Book Of Western Wild Flowers.
This is an attractive plant, from one to three feet tall, with slender, reddish-brown stems, with but few branches, and smooth, bright green leaves, paler on the under side. The small flowers are cream-white, with pinkish buds, and form very pretty, feathery, flat-topped clusters, about three inches across. This is found on banks and rocky places, in the mountains, and grows also in the East.
Flat-top-Meadow-sweet-Spiraea corymbosa.
 
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