herbs with strongly dissected leaves and filiform leaf-segments. Leaves 2-3
pinnatisect or decompound. Flowers often with an involucre of 5 leaves,
protandrous. Sepals 5, petaloid, shortly clawed. Petals 5-8, nectariferous,
bilabiate, the outer lips deeply incised. Stamens numerous. Carpels 5, connate
up to the apex, styles free. Fruits of 5, united follicles, many-seeded.