Quote From: judyblue22When you put your daughter's name on title with you, you give that person a share of current ownership in the property. That means: 
- if she gets divorced, her spouse can make a claim to share in her interest in the land.
- if she dies, her estate would include her interest in the land.
- if she has creditors that she doesn't pay, they can register a lein against the land.
- if you want to take a loan against the land or sell it, you need her consent.
- if you change your mind about who you wish to leave your land to, you can only change it if she is willing to sign a transfer of her interest back to you.
As you can see, this is a big step and is very risky. There are times when it does save time and money though. Before you take such a drastic step, please ensure that there really would be a substantial tax savings (check that with an accountant) and determine if there is a way to accomplish the savings without changing ownership of the land.  
 
If you decide to put your daughter's name on your land, consult a lawyer about getting a trust document for your daughter to sign first that establishes that the transaction was for estate planning purposes only and is not intended to give her any rights to the land during your lifetime. The document should also include a promise from your daughter that would be binding on her estate to transfer the land back to you at any time at your request. 
You brought up some very good points. Do any of these people know what they are doing? I understand the concern that things are done correctly to avoid losing money to taxes but even the daughter doesn't know the right things to do. I have been told that property needs to be put in a Trust to protect against paying inheritance tax or capitol gains tax. Maybe this is something that differs from state to state but it should be checked out with a qualified money planner. If the mother were to put the daughter's name as a co-owner then if the daughter got sued for some reason the land is at risk because she is part owner. Never a wise thing to do, very risky.
The mother and daughter need to go together to a knowledgable tax attorney/financial planner and find out the best way to protect everyone's interests. Get a clue, daughter, you are not in control of this, your mother is. She made need some help and support in doing the right things, but putting her on the defense is not going to be in your favor. She just might leave it all to somebody besides you and who would blame her? Find out if an irrevocable Trust would work for you.