@Ender97 my bad Ender, i really disconnected for a long time, and never noticed this message, im not from New Mexico, i live in Mexico, Baja California. Just south of the border from San Diego. I really have no idea were you could find some near you, but you should look around, maybe you'd be surprised at what you find, specially on streams that are flowing year round. Also be careful, even though i took such a small sample, somehow, i took in snails, fly larvae's, other insects larvae's, and even what i thought was a parasite. all in one single scoop. So really id recommend placing the plants in a separate/quarantine tank to observe for any hitchhikers. in my case i took samples from what i had and moved them through another container, where i let them grow again, and then i added them into my main tank. Also i made a massive mistake, many months later, i decided to make a maintenance session and placed all the floaters i had in a separate container, topperware, and for whatever reason i thought i could leave them there for 2 days as i left the city, when i left i closed the topperware hoping this would keep the container from loosing too much water from evaporation as well as i didnt want mosquitos to lay any eggs on them, as i for whatever reason placed this topperware outside in the sun..... when i came back just 2 days later, all the plants were basically dead, anywhere from 70-80%, most of them died to some fungus that ran rampant in the intense humidty of the topperware. Sadly what i had left was a few from 3 different species of floaters, and simply what was left of these azollas got out grown by the other floaters, duckwheat mostly, little by little i lost the azollas, until i had no more. i should've placed them in a separate container all by themselves, trying to keep a sample colony or whatever. Last azollas i saw in my tanks was about a month and a half ago, i tried to keep up on them to rescue the plant, and even though i thought of separating them since back then i opted to leaving them in the tanks cause the water there is much richer in nutrients than just any other container... sadly like i said it didnt work, and now i have learned my lesson, i plan on going to pick another sample, but i havent had the chance to go again, as it is some 2 hrs away from where i live.
Sooo yeah recaping, be carefull with what you take from the local waters, quarantine the samples, and be carefull with closed containers that can affect the floaters with too much humidity. Good luck!