Myriophyllum

Myriophyllum heterophyllum
Both submerged foliage and emergent floral stems are evident
Modified from image online

 

Myriophyllum heterophyllum
Emergent floral stem with male flowers
Modified from image online

 

Myriophyllum humile ("Low Water Milfoil") from Maine USA
Photograph by Don Cameron, Maine Natural Areas Program (MNAP), posted online

 

Myriophyllum aquaticum
Photograph posted online

 

Myriophyllum aquaticum from the Withlacoochee River, Florida USA
Photograph by Eric B. Holt posted online

 

Myriophyllum aquaticum, female flowers
Photograph by David Fenwick posted online

 

Myriophyllum hippuroides
Photo posted online

 

Myriophyllum tuberculatum
Range: India, Pakistan, Indonesia. Photo posted online

 

Myriophyllum verticillatum
Photograph by Kristian Peters posted online

 

Myriophyllum spicatum
Photograph by Dennis Stevenson posted online

 

Myriophyllum sp. cross section of stem showing carinal canals
Photograph by Ann Hirsch, Botanical Society of America, posted online

 

Myriophyllum spicatum infestation
Photograph posted online

 

Myriophyllum mattagrossense
Photograph posted online