[Taxacom] Drawing of Myriophyllum fruits

[Adolf & Oluna Ceska]

I am looking for drawings of fruits ("mericarps") of the following
water-milfoil (Myriophyllum) species:

 

Myriophyllum heterophyllum

Myriophyllum pinnatum

Myriophyllum quitense 

Myriophyllum ussuriense

 

I would greatly appreciate if some of those botanists who like to have their
feet wet could help me.

 

Many thanks,

 

Adolf Ceska, Victoria, British Columbia, Canada