Here is the streamer information for TTree related classes in release 3.02.06:
(For the explanation of the meaning of the type, see "fType" in "streamerinfo.txt".)
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StreamerInfo for class: TTree, version=6
BASE TNamed offset= 0 type=67 The basis for a named object (name, title)
BASE TAttLine offset= 0 type= 0 Line attributes
BASE TAttFill offset= 0 type= 0 Fill area attributes
BASE TAttMarker offset= 0 type= 0 Marker attributes
Stat_t fEntries offset= 0 type= 8 Number of entries
Stat_t fTotBytes offset= 0 type= 8 Total number of bytes in all branches before compression
Stat_t fZipBytes offset= 0 type= 8 Total number of bytes in all branches after compression
Stat_t fSavedBytes offset= 0 type= 8 Number of autosaved bytes
Int_t fTimerInterval offset= 0 type= 3 Timer interval in milliseconds
Int_t fScanField offset= 0 type= 3 Number of runs before prompting in Scan
Int_t fUpdate offset= 0 type= 3 Update frequency for EntryLoop
Int_t fMaxEntryLoop offset= 0 type= 3 Maximum number of entries to process
Int_t fMaxVirtualSize offset= 0 type= 3 Maximum total size of buffers kept in memory
Int_t fAutoSave offset= 0 type= 3 Autosave tree when fAutoSave bytes produced
Int_t fEstimate offset= 0 type= 3 Number of entries to estimate histogram limits
TObjArray fBranches offset= 0 type=61 List of Branches
TObjArray fLeaves offset= 0 type=61 Direct pointers to individual branch leaves
TArrayD fIndexValues offset= 0 type=62 Sorted index values
TArrayI fIndex offset= 0 type=62 Index of sorted values
TList* fFriends offset= 0 type=64 pointer to list of friend elements
StreamerInfo for class: TAttLine, version=1
Color_t fLineColor offset= 0 type= 2 line color
Style_t fLineStyle offset= 0 type= 2 line style
Width_t fLineWidth offset= 0 type= 2 line width
StreamerInfo for class: TAttFill, version=1
Color_t fFillColor offset= 0 type= 2 fill area color
Style_t fFillStyle offset= 0 type= 2 fill area style
StreamerInfo for class: TAttMarker, version=1
Color_t fMarkerColor offset= 0 type= 2 Marker color index
Style_t fMarkerStyle offset= 0 type= 2 Marker style
Size_t fMarkerSize offset= 0 type= 5 Marker size
StreamerInfo for class: TBranch, version=7
BASE TNamed offset= 0 type=67 The basis for a named object (name, title)
Int_t fCompress offset= 0 type= 3 (=1 branch is compressed, 0 otherwise)
Int_t fBasketSize offset= 0 type= 3 Initial Size of Basket Buffer
Int_t fEntryOffsetLen offset= 0 type= 3 Initial Length of fEntryOffset table in the basket buffers
Int_t fWriteBasket offset= 0 type= 3 Last basket number written
Int_t fEntryNumber offset= 0 type= 3 Current entry number (last one filled in this branch)
Int_t fOffset offset= 0 type= 3 Offset of this branch
Int_t fMaxBaskets offset= 0 type= 6 Maximum number of Baskets so far
Int_t fSplitLevel offset= 0 type= 3 Branch split level
Stat_t fEntries offset= 0 type= 8 Number of entries
Stat_t fTotBytes offset= 0 type= 8 Total number of bytes in all leaves before compression
Stat_t fZipBytes offset= 0 type= 8 Total number of bytes in all leaves after compression
TObjArray fBranches offset= 0 type=61 -> List of Branches of this branch
TObjArray fLeaves offset= 0 type=61 -> List of leaves of this branch
TObjArray fBaskets offset= 0 type=61 -> List of baskets of this branch
Int_t* fBasketBytes offset= 0 type=43 [fMaxBaskets] Length of baskets on file
Int_t* fBasketEntry offset= 0 type=43 [fMaxBaskets] Table of first entry in eack basket
Seek_t* fBasketSeek offset= 0 type=43 [fMaxBaskets] Addresses of baskets on file
TString fFileName offset= 0 type=65 Name of file where buffers are stored ("" if in same file as Tree header)
StreamerInfo for class: TBranchElement, version=7
BASE TBranch offset= 0 type= 0 Branch descriptor
TString fClassName offset= 0 type=65 Class name of referenced object
TString fParentName offset= 0 type=65 Name of parent class
TString fClonesName offset= 0 type=65 Name of class in TClonesArray (if any)
Int_t fClassVersion offset= 0 type= 3 Version number of class
Int_t fID offset= 0 type= 3 element serial number in fInfo
Int_t fType offset= 0 type= 3 branch type
Int_t fStreamerType offset= 0 type= 3 branch streamer type
Int_t fMaximum offset= 0 type= 3 Maximum entries for a TClonesArray or variable array
TBranchElement*fBranchCount offset= 0 type=64 pointer to primary branchcount branch
TBranchElement*fBranchCount2 offset= 0 type=64 pointer to secondary branchcount branch
StreamerInfo for class: TLeaf, version=2
BASE TNamed offset= 0 type=67 The basis for a named object (name, title)
Int_t fLen offset= 0 type= 3 Number of fixed length elements
Int_t fLenType offset= 0 type= 3 Number of bytes for this data type
Int_t fOffset offset= 0 type= 3 Offset in ClonesArray object (if one)
Bool_t fIsRange offset= 0 type=11 (=kTRUE if leaf has a range, kFALSE otherwise)
Bool_t fIsUnsigned offset= 0 type=11 (=kTRUE if unsigned, kFALSE otherwise)
TLeaf* fLeafCount offset= 0 type=64 Pointer to Leaf count if variable length
StreamerInfo for class: TLeafElement, version=1
BASE TLeaf offset= 0 type= 0 Leaf: description of a Branch data type
Int_t fID offset= 0 type= 3 element serial number in fInfo
Int_t fType offset= 0 type= 3 leaf type