The WPGMA dendrogram WPGMA

the dendrogram complete. ultrametric because tips (



a


{\displaystyle a}





e


{\displaystyle e}

) equidistant



r


{\displaystyle r}

 :

δ
(
a
,
r
)
=
δ
(
b
,
r
)
=
δ
(
e
,
r
)
=
δ
(
c
,
r
)
=
δ
(
d
,
r
)
=
17.5


{\displaystyle \delta (a,r)=\delta (b,r)=\delta (e,r)=\delta (c,r)=\delta (d,r)=17.5}

the dendrogram therefore rooted



r


{\displaystyle r}

, deepest node.