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 simple proximal part of each arm is three times as long and twice as broad as each branch of the dichotomous distal part.
Frond wholly divided into narrow ligulate, dichotomous, bi or multiserial branches; no vibracula.
Now this rule is equivalent in bearing to the rule of the phratries, it is a dichotomous division.
The gills are generally forked, once or several times, in a dichotomous manner, though sometimes irregularly.
These dichotomous processes are nothing more than branches developed from the arcuate, or mother cells.
In these there is a thallus which starts from a central point and continually divides in a forked or dichotomous manner.
The caudal fin, with its dichotomous rays, is essentially like the tail of a lamprey.
Fruit an obscurely 3-lobed, 3-celled, 3-seeded pod in dichotomous clusters, both axillary and terminal.
Thallus radiate or dichotomous, the epidermis usually porose.
