Monday, February 10, 2014
If a key has subkeys, there may be more than one path to a subkey. For example, Cyperaceae Carex has subkeys Key A through Key F, and each of these have subkeys that are intermediate ranks. In particular, one of the subkeys for Key C is section Ovales, and there are three attribute sets leading to the group of species in section Ovales:
[Include a diagram like on 6/24/2015 showing the MASG base node becomes the merge point for any Multiple Attribute Set targets in the MASG, and the common attributes for the MASG are for both the MASG and these MAS targets.]
However, the taxon group does not have to be named. Here is part of the Carex section Ovales key for species east of the Rocky Mountains:
How a connector node is used with a target taxon that has multiple attribute sets is described in Node Structure and Types. A connector node is also needed for a couplet with multiple attribute sets leading to taxa group.
The fact that couplets 56 is associated with the C. opaca - C. shinnersii taxon group (and likewise, couplet 57 is associated with a taxon group) is stored as intermediate name in the couplet node (see Node Structure and Types). The intermediate name in a couplet node is also sometimes used to store an intermediate rank that is associated with the couplet.