We found 2 dictionaries that define the word arroyo willows:

General (2 matching dictionaries)

1. arroyo willows: Merriam-Webster
2. arroyo willows: Vocabulary.com

(Note: See arroyo_willow as well.)

Definitions from WordNet (arroyo willow) ▸ noun:  shrubby willow of the western United States ▸ Also see arroyo_willow ▸ Words similar to arroyo willows ▸ Usage examples for arroyo willows ▸ Idioms related to arroyo willows ▸ Wikipedia articles (New!) ▸ Words that often appear near arroyo willows ▸ Rhymes of arroyo willows ▸ Invented words related to arroyo willows