(A) Cypereae, (B) Disa, (C) Indiogofera,
(D) Lachnaea, (E) Muraltia, (F)
Pentaschistis, (G) Podalyrieae, (H)
Restionaceae, (I) Zygophyllum, (J) Protea,
and (K) Moraea. Solid line, observed values; dashed red
line, Brownian expectations; dashed blue line, punctuated model (range
asymmetry factor = 2, s.d. for evolutionary drift
= 2, evolutionary trend = 0.3;
Materials and Methods). Clade age
is scaled between 0 and 1, with 0 zero representing clade origins and 1
representing the present day. High relative disparity towards the present
(e.g., Cypereae, Indigofera, Muraltia,
Podalyrieae, Protea, and Restionaceae)
indicates that most variation in extinction risk is between species within
subclades, i.e. closely related species frequently differ strongly in
extinction risk. Low relative disparity towards the root of the tree (e.g.,
Disa, Indigofera,
Moraea, and Muraltia) indicates that
most variation in extinction risk is between subclades, i.e. species are
more similar in extinction risk within subclades than between subclades.