To appreciate the Palmer paradox, it's important to understand that Palmer's childhood and young adulthood were dichotomous.
Or rather, it hints at how elusive a clear view of the dichotomous Palmer can be.
The colonies are usually richly branched upon the dichotomous plan and the entire colony is contractile.
Frond wholly divided into narrow ligulate, dichotomous, bi or multiserial branches; no vibracula.
Fruit an obscurely 3-lobed, 3-celled, 3-seeded pod in dichotomous clusters, both axillary and terminal.
Now this rule is equivalent in bearing to the rule of the phratries, it is a dichotomous division.
The simple proximal half of each arm about the same size as each branch of the dichotomous distal part, twice as long as broad.
The gills are generally forked, once or several times, in a dichotomous manner, though sometimes irregularly.
In these there is a thallus which starts from a central point and continually divides in a forked or dichotomous manner.
These dichotomous processes are nothing more than branches developed from the arcuate, or mother cells.