46644
The larvae feed ( usually gregariously ) on rosebay willowherb ( " Chamerion angustifolium " ) , broad-leaved willowherb ( " Epilobium montanum " ) and great willowherb ( " Epilobium hirsutum " ) .
 Chamerion angustifolium, Epilobium montanum, Epilobium hirsutum
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:
 Chamerion angustifolium, Epilobium montanum, Epilobium hirsutum