Puccinia hemerocallidis on Hemerocallis fulva var. longituba growing in Japan. The leaves on the left show the early stage development of dark colored telia (masses of teliospores) around the more familiar orange uredia (masses of urediospores). Urediospores are able to re-infect daylilies directly, but teliospores cannot. Teliospores germinate to produce basidiospores which infect the alternate host, Patrinia, and then complete the next stage of the life cycle. These infections on Patrinia produce aeciospores which return the rust to daylilies.
©2002-2009.
Photographer Y. Ono, images used with permission.
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Location
of daylilies next
to paddy field in
late winter
Dead leaves from
last year showing
black telia
Division showing no telia were present below soil level.
New growth shows
no rust.
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