Figure 3.

Branch lengths inferred by parsimony for rps2 evolution. Same tree topology as Fig. 2, but zero length branches are collapsed. Taxon legends as in Fig. 1. Branch lengths calculated by paup 3.1.1 (25) using acctran transformation; deltran gives essentially the same picture. Taxa with significant relative rate tests (Table 1) indicated with * (synonymous) or # (nonsynonymous). Holoparasites are shown in bold.