This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Shrubs, with opposite 3-foliolate or pinnate leaves, and axillary drooping racemes or panicles of white flowers. Pedicels jointed. Sepals imbricated. Petals the same number as the sepals and about equalling them. Ovary 2-3-parted, the lobes I-celled; ovules numerous in each cavity, anatropous. Capsule 2-3-lobed, 2-3-celled. Seeds globose. [Greek, cluster.]
About 6 species, of the north temperate zone. 5". Bolanderi A. Gray occurs in California. Type species: Staphylea pinnata L.
Staphylea trifolia L. Sp. Pl. 270. 1753.
A branching shrub, 6°-15° high, or in the south sometimes a tree up to 30o high with a trunk 6' in diameter, with smooth striped bark. Young leaves and petioles pubescent; mature foliage glabrate; stipules linear, 4"-6" long, caducous; leaflets ovate or oval, 1 1/2'-2 11/2' long, acuminate at the apex, obtuse or somewhat cuneate at the base, finely and sharply serrate, the lateral ones sessile or nearly so, the terminal one stalked; stipels subulate; flowers cam-panulate, racemed, about 4" long; pedicels bracted at the base, slightly longer than the flowers; capsule about 2' long, l' wide, much inflated, the 3 (rarely 4) carpels separate at the summit and dehiscent along the inner side.