|
| ` ` ` ` @ ` ` ` ` | ` ` ` ` | ` ` ` ` @ ` ` ` ` |
o-------------------o ` ` ` ` o-------------------o
| ` ( p ,(q),(r)) ` | ` ` ` ` | `(( p ,(q),(r)))` |
o-------------------o ` ` ` ` o-------------------o
| ` ` ` q_97` ` ` ` | ` ` ` ` | ` ` ` q_158 ` ` ` |
o-------------------o ` ` ` ` o-------------------o

Cactus forms of the generic shape (g, (s_1), ..., (s_k))
are those that arise when we have a &quot;genus and species&quot;
or a &quot;pie chart&quot; arrangement of logical features, where
g is the