Inflorescence: head-like, on unbranched, scapose peduncle; involucre sheathing, recurved; bracts subtending individual flowers.Flower: calyx 10-ribbed; styles fused at base, hairy. calyx tubular, generally membranous or partly scarious, lobes 5, persistent; petals 5, +- free to +- fused, clawed, +- intertwined; stamens 5, opposite petals, occasionally epipetalous; ovary superior, generally 5-lobed or -ribbed, chamber and ovule 1, styles 5,
