i'll search for b.cultorum in var societies. but i have not seen that 'red throat' anywhere.
it's a begonia heaven for sure (Palm Hammock) stuffed with amazing plants. though it has a feel of forgotten kingdom - a la 'sleeping beauty'. i just hope it won't disappear.
i have pics of many NOID. should i do more :)? just so i can put up pretty pix ;)?