This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Having no branches

adj. straight-chain

Not branched; not provided with branches.

adj. without branches

"If we have unbranched descent, then it forms a nested hierarchy if we group by branch and stem."

branchless   

reed-like    well-lubricated    corky    rams'    orange-tinted    x-shaped    barrel-shaped    seed-bearing    paraboloid    tail-like