Spring has arrived with farmers planting corn and people planting trees, so perhaps this is the best time to discuss the 2004-D Wisconsin Extra Leaf, low and high, and 2005-P-D-S Minnesota Extra Tree minted on Washington clad quarters.
2004-D Wisconsin Extra Lead Low and High
A die gouge caused the extra leaves on the 2004-D quarters. Mint officials surmised that someone intentionally etched these into the die with a sharp tool. That person did a good job, too, as the extra leaves connect to the corn cob as if so designed.

Here is a closer view:

Estimates are some 2,000 2004-D Wisconsin Extra Leaf Low quarters and 3,000 Extra Leaf High were produced out of a total mintage of 226,800,000. An MS65 Low Leaf quarter is typically valued at around $160; High Leaf, $200.
2005-P-D-S Minnesota Extra Tree
The extra trees are doubled die errors caused by a die fault or shift. There are dozens of varieties (see Wexler’s Die Varieties and Ken Potter’s Doubled Die Listings). In any case, you will need a loupe or coin microscope to verify the doubled dies as these are relatively small.
2005-P Extra Tree
Here’s an easily spotted tree on this error to the right of the fourth tree.

At MS65, the 2005 Minnesota State Quarter with the “extra tree” retails between $150 and $200. No specific estimate on how many escaped the Mint, put many put it in the thousands out of a total mintage of 239,600,000.
2005-D Extra Tree
The extra tree here also is a doubled die error. These are difficult to identify on circulated coins because of wear. Although there are many varieties, as Wexler and Potter document, a desired type displays the extra tree to the right of the state map, seemingly floating like a drone.

At MS65, the 2005-D Minnesota extra tree quarter typically has a value between $100 and $200. Thousands of the error are thought to have left the mint out of a total mintage of 248,400,000.
2005-S Extra Tree

There are also several varieties of faint doubled dies on the 2005-S Minnesota quarter. See Wexler’s and Potter’s links, referenced earlier, for these. At MS65, these retail for about $40.
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