Genus: Cephalanthus

Cephalanthus

(Cephalanthus)
sef-ah-LAN-thus
Rubiaceae
In the genus Cephalanthus are ten or so species from wetlands and river edges in Africa, Asia, and North and Central America. Their ball-shaped, fragrant flowers are their most distinguishing feature. They attract bees and butterflies. The fruit that follows is sometimes eaten by waterfowl in wet areas. Plant Cephalanthus in a shrub border or at waterside.
Noteworthy characteristics:  Fragrant flowers that resemble golf balls.
Care:  Choose a site in full sun with fertile, humusy, moist but well-drained soil that has a neutral to acidic pH. C. occidentalis can grow in shallow water.
Propagation: 

Start seeds in a cold frame in autumn. Take semi-ripe cuttings in summer or root hardwood cuttings in winter.

Species, varieties and clutivars for genus Cephalanthus

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Buttonbush
Cephalanthus occidentalis
Problems: 

Usually trouble-free.