Hibiscus should be safe to eat. I foound a relative of Bidens plosa on Melissa Kaplans list of toxic plants- Bidens frondosa (BEGGAR-TICK); plant may contain toxic levels of nitrates. I found (for cattle):

Clinical signs of nitrate poisoning are related to the lack of oxygen in the blood. Acute poisoning usually occurs between a half hour to four hours after consuming toxic levels of nitrate. Onset of symptoms are rapid and include:



bluish/chocolate brown mucous membranes

rapid/difficult breathing

noisy breathing

rapid pulse (150 /min)

salivation, bloat, tremors, staggering

weakness, coma, death

dark "chocolate-colored" blood

Pregnant females that survive nitrate poisoning may abort due to lack of oxygen to the fetus. Abortions generally occur approximately 10-14 days following exposure to nitrates. http://www.ag.ndsu.edu/pubs/ansci/livestoc/v839w.htm



From http://virtual.clemson.edu/groups/psapublishing/PAGES/AGRO/FORAGE13.PDF



Sublethal signs of nitrate poisoning... abdominal pain and diarrhea...



It may not have anything to do with you uro's condition but it would be wise to stop giving the Bidens spilosa and stick with the hibiscus.

Nutri-bac or another pro-biotic may help a little bit with the diarrhea. Nutri-bac is available on line. I haven't seen it in any pet stores around here. Pro-biotics are available at most health food stores in the US, get a non-dairy version. I believe that Uromastyx Dust also contains pro-biotics and is a good feed/supplement and is available at most pet stores around here. It may be the best way to get some nutrition into you uro if he's not eating much. If you can't find it you could probably use the "Iguana Dust".

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