Question

Any botany nerds around?

In the pictures in my book, it looks like moss sperm cells have two flagella of similar length: do they qualify as isokont? They're definitely not heterokont, but when I think isokont, I think of e.g. Chlamydomonas. I know Streptophyta flagella are inserted differently, but I don't know if that makes them something other than isokont.

Also, are there any important algal/land plant groups that only have one flagellum?