Broccoli and phyletic gradualism.
The Evolutionary Biology of Plants by K.J. Niklas University of Chicago Press, 1997. £51.95/$65.00 hbk, £15.95/$19.95 pbk (xix +449 pages) ISBN 0 226 58082 2/0 226 58083 0.
Dept of Plant Sciences, University of Cambridge, UK.
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Willis