Photo 61532678, (c) JoeJoe Clark, some rights reserved (CC BY-NC), uploaded by JoeJoe Clark

Attribution © JoeJoe Clark
some rights reserved
Uploaded by lilyboy lilyboy
Source iNaturalist
Associated observations

Photos / Sounds

What

Western Sword Fern (Polystichum munitum)

Observer

lilyboy

Date

February 14, 2020 05:35 PM PST

Description

Many populations of the Polystichum species suffer an unknown pathogen combined with drought stress and thrips resulting in many die-offs in Napa County. Also, the die-off is impacting Dryopteris arguta which is in the background in the first image.

Sizes