Physospermum
(from physa, a bladder, and sperma, a seed; the teguments do not adhere to the seed in a young state). Bladder Seed. SYNS. Danaa, Haenslera. ORD. Umbelliferae. A small genus (from two to five species have been quoted as distinct by various authors) of hardy, glabrous, perennial herbs, natives of Caucasian Europe and Asia. Flowers white, in compound, many-rayed umbels. Leaves ternato-pinnately decompound; segments cuneate, incised. The species have no horticultural value. P. cornubiense is a British plant.