Agree with others - looks like you have an emulsion there in the first picture - other than heating (not directly, in a warm water bath) something you may try is adding some NaCl - maybe about 40grams for that size bottle, and see if that helps break the emulsion.
Lespedeza seems to have variable results... see
the discussion on Shaman Australis.
In that last picture, it looks to me like you may have extracted plant oils. Try doing your extraction at room temperature next time.
Here's my suggestion to clean it up..
1. pull the alks and fats out of the naptha in your last photo back into salt form by adding warm acidic water (50/50 h20 vinegar will do) and shaking, then put aside the naptha.
2. Then mix fresh warm naptha with the vinegar / water / salts mix (will remove oils / fats), shake and then remove and discard the naptha (or keep for another defat).
3. Take the remaining water / spice mixture and make it alkaline to ~ pH 12.
4. Do ONE PULL at room temp using about half the naptha you put aside in step 1.
5. Freeze precip the pull from step 4 and let us know if you get crystals this time, if so, do more pulls.. otherwise it's likely your Lespedeza doesn't have much kick...
Good luck!
C