Stems or branches pinnate: pinnae or branches alternate, straight, divaricate.
The stems are from one to four inches long, the pinnae about 1/4 to 1/2 inch, alternate.
The pinnae are also divided, but less distinctly, into internodes of various lengths.
Stem and branches pinnate or bipinnate, the pinnae and pinnules alternate.
Pinnae was the name given to the side wings of ...