this discussion/question on the Hoya Forum ... so you know what it is?
http://davesgarden.com/community/forums/t/966109/
TIA....
Carol
Dave....could you go to...
Hi Carol, not sure what it might be except for some type of fungi. Maybe the leaves are getting too wet?
There isn't anything 'botanically' equivalent to '''''umbilical cord'''' ? I get that she sees it often. Maybe i should ask more questions.....