Image courtesy of the slide collection of Jack Harper.
Image courtesy of the slide collection of Jack Harper.
Image courtesy of the slide collection of Jack Harper.
Image courtesy of the slide collection of Jack Harper.
Image courtesy of the slide collection of Jack Harper.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Image courtesy of Larry Kuhns.
Seedhead. Image courtesy of Larry Kuhns.
Seedhead. Image courtesy of Larry Kuhns.
Image courtesy of Matthew Naedel.
Triangular cross-section of leaf. Image courtesy of Matthew Naedel.
Rhizomes and nutlets. Image courtesy of Matthew Naedel.
Nutlet. Image courtesy of Matthew Naedel.