outgroup to Acanthus

[Curtis Clark]

Lai-Lai Teo wrote:

>Is it a must to
>use the nearest sister group as an outgroup for phylogenetic analysis? How
>would different outgroups affect the phylogenetic trees produced?

The following article has some useful insights:

Donoghue, M.J. and P.D. Cantino. 1984. The logic and limitations of the
outgroup substitution approach to cladistic analysis. Syst. Bot. 9:192-202.


--
Curtis Clark                 http://www.csupomona.edu/~jcclark/
Biological Sciences Department             Voice (909) 869-4062
California State Polytechnic University      FAX (909) 869-4078
Pomona CA 91768-4032  USA                 jcclark at csupomona.edu