How many letters does the top answer for “a genus of trees including the elm.” have?

The most common answer is ulmus (5 letters).

Crossword clue: a genus of trees including the elm.

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

ulmus 5 letters web-def

A genus of trees including the elm.

a genus of trees including the olive. 60% similar → olea

a genus of palms including the date tree. 50% similar → phoenix