And some crow's foot at about 6000 to 7500ft.
Yes, life's rough studying plants in alpine meadows full of wildflowers.
I will not talk about the mosquitos from Hell though
Here's the same plant in lake formed by the worst of water vermin, beavers
There's also Willow moss growing well in there also.
Lassen's national park is one of the least visited, but one of the best IME. It has a lot to offer and very few people.
As you can clearly see, it has a lot of beautiful aquatic plant habitats and species. Each 1-2 hour drive radius in CA seems to have a unique set of habitats.
So while it's not normally considered a source, clearly there are many aquatic plants here if you know where to look.
Oh, and there's mountains, rivers, swimming holes, flowers, critters, trout, big trees, waterfalls etc nearby also