Major problems with two vandaceous
 

My rhynchostylis gigantea has lots of black spots on it. It also has an interesting looking semi see through yellowish spot with a pink ring around it. Finally, the leaves are yellow and shriveled.
http://img.tapatalk.com/d/14/02/18/rupe9uvu.jpghttp://img.tapatalk.com/d/14/02/18/buhyqyha.jpghttp://img.tapatalk.com/d/14/02/18/uvezy9ej.jpg
Also, my renanthera has lost a half of a leaf and there looks like there is a little black streak on it. There are also some little indents in the leaves in places.
http://img.tapatalk.com/d/14/02/18/ynagedub.jpghttp://img.tapatalk.com/d/14/02/18/8uzu6yry.jpg
Thanks.

The Rynchostylis looks to be severely dehydrated causing the plant to be severly weakened. The black spots I am guessing are bacterial, try spraying with diluted Physan-20 or copper soap.

Ok, thanks.