I realize this is an old thread but, it still comes up in searches so it wants setting straight- and there IS a lot of confusion in it.
The original poster had this to say;
I'm puzzled by a style of hat I see in lots and lots of ACW photos, but have never seen on a reenactor. That, as was correctly pointed out is a "beehive hat." One of many variations of the venerable slouch hat. He is correct that you don't see that specific style but, the soldier on left wearing it has it bent around to his personal satisfaction. Punched out, the crown might even be round. I can't even begin to explain that arrangement of the brim. First rain it will fill up till it softens and the pressure dumps it all down on him.
One commentator had this to say;
Also called a "plug" hat. Various names for the style, which was very common. Good protection from the elements. The brim curls up naturally as it was not flattened.
This quote is quite incorrect. The term "plug hat" first appeared in print in 1863 but referred to the silk "top hat" but was best known later in reference to the Derby or Bowler hat. In any case, it was directed to stiff crowned hats with stiff narrow brims. Not at all commensurate with the traditional "slouch hat."
For one thing, there was not one, all defining design of "slouch hat." The closest that can be said to that would be a low crowned had with a wide brim but probably not over 3 to 3-1/2" in width.
Another poster saith;
Trying to find that hat's not gonna be easy, the Confederate Army uniform was so irregular, all types of hats were probably worn by the soldiers, most just wore their homemade farming hats. The Confederate supply system suffered from the system of government- As a confederation, the troops were all provided by the states which in turn were supposed to be supplied BY those states. Obviously, that left the Texas and Arkansas troops in Lee's army (among other non-Virginia units) in a world of hurt!
It was a Bring Your Own Hat affair. Some rough,old,boys,there. One Texan came to Virginia with a Hardee hat foisted upon him by his father. He last saw it rolling down Turkey Hill at Gaines mill and like many others, found himself wounded and hatless. (See "Val Giles Rags and Hope") But, the Texans were ever resourceful. Ine one case there was a train coming out of Richmond that slowed climbing a rise not far from the Camps. Some Texans hid in a brushy ravine nearby and when the train slowed, they jumped out and fired off their muskets. When everybody stuck their heads out to see what all the noise was about, other soldiers jumped up with branches and knocked off the guys hats. They managed this a couple of times till a trainload of politicians lost their hats and a guard was put on that stretch of road.* The whole point of this is to demonstrate that very often hats, like shoes, came from wherever you could get them.
* Hood's Texas Brigade; Lee's Grenadier Guard- Harold B. Simpson
Finally, there was a comparison to the "campaign hat." In it's earliest form, the "Campaign hat" was originally a civilian hat referred to as the Montana Peak hat. The Campaign hat did not come into use as military headgear until about the 1870s. Wikipedia is an iffy source for things but this seems a well founded review of the subject- (I only wanted to insert the link to the article here but twice it has rendered the link into the whole article. I don't know why. Sorry!)
The orig/poster was concerned that the hat seemed overly large. It isn't really, maybe it was just oversized for him? But as such hats go, it was basically a low crowned affair. He ought to see a Hardy hat! (see in this thread...
http://civilwartalk.com/threads/3-easy-headgear-3-23-12.71076/).
I was a reenactor (back in the 1980s) and while not pointed, I think I can claim my hat to be fairly authentic... (see below) An original hat of a Tennessee soldier and mine. I have a small head and near as I could determine, my hat which came from a thrift store was a woman's hat of some decades back. It was still a bit loose and I have pages from a (reproduction) of a Harper's Weekly paper stuffed in the hat band. The star was of a type often attached to horses halters or bridles.
Concerning the beehive, it appears to be but one of many of it's general type. I cannot find any particular history of it on a brief search so I'll end this here.