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.
Diffuse glabrous annuals with alternate dissected exstipulate leaves. Flowers regular, pedunculate, solitary, axillary, white, yellow, or rose. Sepals 5, valvate. Petals 5, sub-perigynous, contorted. Stamens 10, free, inserted with the petals. Fruit of about 5 indehiscent indurated 1-seeded carpels. There are three Californian species, only one of which is in general cultivation. From a marsh, and
1. L. Douglasii. - A prostrate pinnate-leaved annual with yellow or white rather large sweet-scented flowers.