129288
The dominant canopy species here are alder ( " Alnus glutinosa " ) , ash ( " Fraxinus excelsior " ) , downy birch ( " Betula pubescens " ) , and willow ( " Salix " spp . ) .
 alder, ash, willow
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 alder, ash, willow