This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Small shrubs with evergreen revolute bullate leaves rusty-tomentose beneath and terminal clusters of small white or pinkish flowers. This genus is distinguished by having a corolla of 5 separate petals and 5 stamens. The few species known are found in swampy bogs of Europe, Asia, and North America.
1. L. padustre. - This is the common European species, growing from 2 to 3 feet high. Leaves distant, narrow, revo-lute, distinctly petiolate.
2. L. latifolium. - An American plant very similar to No. 1, but the leaves are oval or oblong, and scarcely recurved at the margin, and the flowers are more numerous. Both bloom in Spring.