Authenticated (20/3/03) by Dr Aljos Farjon, Royal Botanic Gardens, Kew.
http://www.rbgkew.org.uk
Glossary
Whorl: in animals, the spiral or convolutions in the shell of a snail. In plants, a set of leaves, flowers, or branches that spring from a stem at the same point and encircle it.
Devall, M.S., Parresol, B.R., and Armesto, J.J. (1998) Dendroecological analysis of a Fitzroya cupressoids and a Nothofagus nitid stand in the Cordillera Pelada, Chile. Forest Ecology and Management, 108: 135-145.
Royal Botanic Gardens, Edinburgh (January, 2003) www.rbge.org.uk