I am fairly sure that is black medic, medicago lupulina, and is in the feed in moderation listing on the tortiose table
https://www.thetortoisetable.org.uk/plant-database/viewplants/?plant=52&c=6
It has lived the past year or so in a 2'x6' closed chamber with che heating, a 48" t5 ho fixture with an Arcadia 12% uvb bulb on 4 hours a day. I fully adopted the monsoon method once i found these forums. The temps are kept at at least 80f with the basking spot getting into the 90s. The...