The Ministry of Natural Resources Natural Heritage Information Centre (NHIC) tracks the status and occurrences of rare vegetation communities in Ontario. The table that makes up this appendix, indicates the upper tier municipalities where rare vegetation communities are known to occur. The numbers indicate the numbers of known occurrences and an “x” denotes that the community is known to occur.

The table indicates the rarity of the vegetation community, which is represented by the S-rank (described in Appendix J) and G-rank (which denotes global rarity).

The Southern Ontario ELC Code and EL Code are listed in order to cross reference the communities listed with the NHIC and those described by the Ecological Land Classification System.

S. Ont ELC code ELCODE Common name GRANK SRANK Brant Bruce Dufferin Durham Elgin Essex Frontenac Grey Haldimand-Norfolk Haliburton Halton Hamilton-Wentworth Hastings Huron Kenora Kent Lambton
ALO1-1 CEGL005192 Dry Lichen-Moss Open Alvar Pavement Type G2 S1   3                              
ALO1-2 CEGL005235 Dry Annual Open Alvar Pavement Type G2 S1             1           X        
ALO1-3 CEON000218 Northern Dropseed - Little Bluestem - Scirpus-like Sedge Alvar Grassland Type G2G3? S2S3   14         X           X        
ALO1-4 CEON000225 White Cedar - White Spruce - Philadelphia Panic Grass Treed Alvar Grassland Type G3? S3   1         X           X        
ALO1-5 CEON000219 Tufted Hairgrass - Canada Bluegrass - Philadelphia Panic Grass Alvar Grassland Type G2G3? S2S3   5         1           3        
ALS1-1 CEON000222 Common Juniper - Fragrant Sumac - Hairy Beardtongue Alvar Shrubland Type G2? S2   3                     2        
ALS1-2 CEON000221 Creeping Juniper - common Juniper - Shrubby Cinquefoil Alvar Shrubland Type G2? S2   6                              
ALS1-3 CEON000216 Shrub Conifer - Dwarf Lake Iris Alvar Shrubland Type G2? S2   3                              
ALT1-1 CEON000220 Chinquapin Oak - Canada Bluegrass - Nodding Onion Alvar Grassland Type G1? S1           1                      
ALT1-2 CEGL005230 Shagbark Hickory - Prickly Ash Treed Alvar G? S?                       1          
ALT1-3 CEON000229 Jack Pine - White Cedar - Common Juniper Treed Alvar Shrubland Type G2? S2   4                              
ALT1-4 CEON000223 White Cedar - Jack Pine - Shrubby Cinquefoil Treed Alvar Pavement G1G2 S1   5                              
ALT1-5 CEON000226 Red Cedar - Early Buttercup Treed Alvar Grassland Type G2? S2                         5        
BBO1-1 CEGL005162 Sea Rocket Sand Beach Type G2G4 S2S3   X       6     X   X           X
BOS2-1 CEON000121 Leatherleaf Shrub Kettle Peatland Type G3G4 S3 X X           X X   X     X      
CLO1-1 CEON000133 Cliffbrake - Lichen Open Unshaded Limestone / Dolostone Cliff Face Type G5 S3   5 X         1     7 X          
CLO1-2 CEON000134 Bulblet Fern - Herb Robert Open Shaded Limestone / Dolostone Cliff Face Type G5 S3   10 X         1     11 2          
CLO1-4 CEGL002048 Open Limestone / Dolostone Seepage Cliff Type G?Q S3     X               X X          
CLO1-5 CEON000136 Open Limestone / Dolostone Cliff Rim Type G5 S2   9 X         1     X X          
CLS1-1 CEGL005066 Common Juniper Open Limestone / Dolostone Cliff Rim Shrubland Type G? S2S3   1                              
CLS1-2 CEGL005070 Round-leaved Dogwood Open Limestone / Dolostone Cliff Rim Shrubland Type G? S3               1     1            
CLT1-1 CEGL002451 White Cedar Treed Limestone Cliff Type G2Q S3   2 X               11 X          
FET1-3 CEON000117 Gray Birch Treed Fen Type G4? S2S3                                  
FOC4-2 CEON000103 White Cedar - Hemlock Coniferous Organic Swamp Type G? S3S4                                  
FOD1-3 CEGL005030 Dry Black Oak Deciduous Forest Type G4? S3 2     X   1     1               X
FOD1-4 CEON000162 Dry - Fresh Mixed Oak Deciduous Forest Type G? S3S4                 1               X
FOD2-2 CEON000159 Dry Oak - Hickory Deciduous Forest Type G4? S3S4 X         X         2            
FOD2-3 CEON000164 Dry - Fresh Hickory Deciduous Forest Type G4? S3S4           2             4        
FOD4-3 CEGL005021 Dry - Fresh Hackberry Deciduous Forest Type G? S2           16                      
FOD6-2 CEON000178 Moist - Fresh Sugar Maple - Black Maple Deciduous Forest Type G? S3?         2           1   4        
FOD7-4 CEON000181 Moist - Fresh Black Walnut Deciduous Forest Type G4? S2S3                                  
MAM2-8 CEON000022 Prairie Slough Grass Mineral Meadow Marsh Type G2G3 S3   2                              
MAM3-7 CEON000029 Prairie Slough Grass Organic Meadow Marsh Type G2G3 S3   1                             X
MAM4-1 CEON000016 Graminoid Coastal Meadow Marsh Type G2? S2   119     2   1   4             1 12
MAM4-2 CEON000017 Shrubby Cinquefoil Coastal Meadow Marsh Type G2? S1   27                              
MAM5-2 CEGL005139 Perched Mineral Prairie Fen Type G3G4 S1 1                                
RBS1-2 CEON000202 Round-leaved Dogwood Limestone / Dolostone Shrubland Barren Type G? S3   1                              
RBT3-1 CEGL005046 Pitch Pine Treed Granite Barren Type G3G5 S1                                  
SBO1-2 CEON000153 Hay Sedge Sand Barren Type G? S1                                  
SDO1-1 CEON000126 Little Bluestem - Switchgrass - Beachgrass Dune Grassland Type G? S2         1 X                      
SDO1-2 CEON000127 Little Bluestem - long-leaved Reed Grass - Great Lakes Wheat Grass Dune Grassland Type                                     X
SDS1-3 CEGL005064 Juniper Dune Shrubland Type G? S2   X       1     X               X
SDT1-1 CEON000131 Cottonwood Dune Savannah Type G1G2 S1           2     X               X
SWT2-8 CEON000057 Silky Dogwood Mineral Thicket Swamp Type G5 S3S4   24                              
SWT3-13 CEGL005083 Poison Sumac Organic Thicket Swamp Type G4? S3 X         X     1                
SWT3-14 CEON000072 Huckleberry Organic Thicket Swamp Type G2Q S1                                  
SWT3-4 CEON000065 Buttonbush Organic Thicket Swamp Type G4 S3                 1                
SWT3-7 CEON000067 Winterberry Organic Thicket Swamp Type G3G4Q S3S4                         1        
TAO1-1 CEON000199 Dry Herbaceous Limestone / Dolostone Talus G? S2   12 X         3     1 4          
TAO1-2 CEON000200 Wet Herbaceous Limestone / Dolostone Talus G? S2   3 X               X X          
TAS1-2 CEGL005067 Mountain Maple Open Limestone Talus Shrubland Type G? S3   2 X         3     4 X          
TAT1-2 CEON000138 White Birch Dry Treed Limestone Talus Type G3G5 S3   4                 3 1          
TAT1-3 CEGL005172 White Cedar Dry Treed Limestone Talus Type G? S3   6 X         20     13 X          
TAT1-4 CEON000139 Sugar Maple Moist Treed Limestone Talus Type G3G5 S3   5           6     14 1          
TAT1-5 CEON000140 Basswood - White Ash - Butternut Moist Treed Limestone Talus Type G3G5 S2   2                 2            
TAT1-6 CEGL005190 Hemlock - Sugar Maple Moist Limestone Talus Type G? S2               3     7           X
TPO1-1 CEGL002210 Dry Tallgrass Prairie Type G3 S1 2         X     4     X 9       X
TPO2-1 CEGL005096 Moist - Fresh Tallgrass Prairie Type G2 S1         3 X                   X  
TPS1-1 CEGL002492 Dry Black Oak Tallgrass Savannah Type G3 S1 1                               X
TPS1-2 CEGL005129 Dry Black Oak-Pine Tallgrass Savannah Type G? S1                 X       1       X
TPS2-1 CEON000155 Moist - Fresh Pin Oak - Bur Oak Tallgrass Savannah Type G1 S1                                  
TPW1-1 CEGL005029 Dry Black Oak - White Oak Tallgrass Woodland Type G? S1 X                     X 12       X
TPW1-2 CEON000230 Dry Bur Oak - Shagbark Hickory Tallgrass Woodland Type G? S1                         4        
TPW2-1 CEON000156 Moist - Fresh Black Oak - White Oak Tallgrass Woodland Type G2 S1           X                     X
TPW2-2 CEON000158 Moist - Fresh Pin Oak Tallgrass Woodland Type G1 S1           X                   X  
  CEON000322 Black Spruce - Tamarack - Leatherleaf Patterned Fen Type                                      
S. Ont ELC code ELCODE Common name Lanark Leeds & Grenville Lennox & Addington Manitoulin Middlesex Muskoka Niagara Northhumberland Ottawa-Carleton Oxford Parry Sound Peel Perth Peterborough Prescott & Russell Prince Edward Rainy River Renfrew Simcoe
ALO1-1 CEGL005192 Dry Lichen-Moss Open Alvar Pavement Type 2     5         2                 X  
ALO1-2 CEGL005235 Dry Annual Open Alvar Pavement Type 2   2 2         2             X   X  
ALO1-3 CEON000218 Northern Dropseed - Little Bluestem - Scirpus-like Sedge Alvar Grassland Type 1   2 10         X             2   X  
ALO1-4 CEON000225 White Cedar - White Spruce - Philadelphia Panic Grass Treed Alvar Grassland Type X   1 2         2             X   X  
ALO1-5 CEON000219 Tufted Hairgrass - Canada Bluegrass - Philadelphia Panic Grass Alvar Grassland Type     1 10                       2      
ALS1-1 CEON000222 Common Juniper - Fragrant Sumac - Hairy Beardtongue Alvar Shrubland Type 2     6         2                 1  
ALS1-2 CEON000221 Creeping Juniper - common Juniper - Shrubby Cinquefoil Alvar Shrubland Type       10                              
ALS1-3 CEON000216 Shrub Conifer - Dwarf Lake Iris Alvar Shrubland Type       6                              
ALT1-1 CEON000220 Chinquapin Oak - Canada Bluegrass - Nodding Onion Alvar Grassland Type                                      
ALT1-2 CEGL005230 Shagbark Hickory - Prickly Ash Treed Alvar                                      
ALT1-3 CEON000229 Jack Pine - White Cedar - Common Juniper Treed Alvar Shrubland Type X     X         X                 X  
ALT1-4 CEON000223 White Cedar - Jack Pine - Shrubby Cinquefoil Treed Alvar Pavement       X                              
ALT1-5 CEON000226 Red Cedar - Early Buttercup Treed Alvar Grassland Type     X                         2      
BBO1-1 CEGL005162 Sea Rocket Sand Beach Type                                     X
BOS2-1 CEON000121 Leatherleaf Shrub Kettle Peatland Type         X     1   X                 X
CLO1-1 CEON000133 Cliffbrake - Lichen Open Unshaded Limestone / Dolostone Cliff Face Type             9                        
CLO1-2 CEON000134 Bulblet Fern - Herb Robert Open Shaded Limestone / Dolostone Cliff Face Type             22         6             X
CLO1-4 CEGL002048 Open Limestone / Dolostone Seepage Cliff Type             6         1             X
CLO1-5 CEON000136 Open Limestone / Dolostone Cliff Rim Type             X                       X
CLS1-1 CEGL005066 Common Juniper Open Limestone / Dolostone Cliff Rim Shrubland Type                                      
CLS1-2 CEGL005070 Round-leaved Dogwood Open Limestone / Dolostone Cliff Rim Shrubland Type             1                        
CLT1-1 CEGL002451 White Cedar Treed Limestone Cliff Type             2         2             X
FET1-3 CEON000117 Gray Birch Treed Fen Type                             2        
FOC4-2 CEON000103 White Cedar - Hemlock Coniferous Organic Swamp Type               5                      
FOD1-3 CEGL005030 Dry Black Oak Deciduous Forest Type             7 6                      
FOD1-4 CEON000162 Dry - Fresh Mixed Oak Deciduous Forest Type                                      
FOD2-2 CEON000159 Dry Oak - Hickory Deciduous Forest Type                                      
FOD2-3 CEON000164 Dry - Fresh Hickory Deciduous Forest Type                                      
FOD4-3 CEGL005021 Dry - Fresh Hackberry Deciduous Forest Type                                      
FOD6-2 CEON000178 Moist - Fresh Sugar Maple - Black Maple Deciduous Forest Type             17     1   2              
FOD7-4 CEON000181 Moist - Fresh Black Walnut Deciduous Forest Type             3                        
MAM2-8 CEON000022 Prairie Slough Grass Mineral Meadow Marsh Type                                      
MAM3-7 CEON000029 Prairie Slough Grass Organic Meadow Marsh Type                                      
MAM4-1 CEON000016 Graminoid Coastal Meadow Marsh Type               2               3     3
MAM4-2 CEON000017 Shrubby Cinquefoil Coastal Meadow Marsh Type                                     1
MAM5-2 CEGL005139 Perched Mineral Prairie Fen Type                                      
RBS1-2 CEON000202 Round-leaved Dogwood Limestone / Dolostone Shrubland Barren Type                                      
RBT3-1 CEGL005046 Pitch Pine Treed Granite Barren Type   11                                  
SBO1-2 CEON000153 Hay Sedge Sand Barren Type               1                      
SDO1-1 CEON000126 Little Bluestem - Switchgrass - Beachgrass Dune Grassland Type               X               X      
SDO1-2 CEON000127 Little Bluestem - long-leaved Reed Grass - Great Lakes Wheat Grass Dune Grassland Type                                      
SDS1-3 CEGL005064 Juniper Dune Shrubland Type                                      
SDT1-1 CEON000131 Cottonwood Dune Savannah Type                                      
SWT2-8 CEON000057 Silky Dogwood Mineral Thicket Swamp Type                                      
SWT3-13 CEGL005083 Poison Sumac Organic Thicket Swamp Type                                      
SWT3-14 CEON000072 Huckleberry Organic Thicket Swamp Type         1                            
SWT3-4 CEON000065 Buttonbush Organic Thicket Swamp Type                                      
SWT3-7 CEON000067 Winterberry Organic Thicket Swamp Type                                      
TAO1-1 CEON000199 Dry Herbaceous Limestone / Dolostone Talus             7                       X
TAO1-2 CEON000200 Wet Herbaceous Limestone / Dolostone Talus             2                       X
TAS1-2 CEGL005067 Mountain Maple Open Limestone Talus Shrubland Type             2         3             X
TAT1-2 CEON000138 White Birch Dry Treed Limestone Talus Type             3                        
TAT1-3 CEGL005172 White Cedar Dry Treed Limestone Talus Type             3                       X
TAT1-4 CEON000139 Sugar Maple Moist Treed Limestone Talus Type             2                        
TAT1-5 CEON000140 Basswood - White Ash - Butternut Moist Treed Limestone Talus Type                       1              
TAT1-6 CEGL005190 Hemlock - Sugar Maple Moist Limestone Talus Type             8         1              
TPO1-1 CEGL002210 Dry Tallgrass Prairie Type         2     13                      
TPO2-1 CEGL005096 Moist - Fresh Tallgrass Prairie Type                                      
TPS1-1 CEGL002492 Dry Black Oak Tallgrass Savannah Type                                      
TPS1-2 CEGL005129 Dry Black Oak-Pine Tallgrass Savannah Type               8                     X
TPS2-1 CEON000155 Moist - Fresh Pin Oak - Bur Oak Tallgrass Savannah Type                                      
TPW1-1 CEGL005029 Dry Black Oak - White Oak Tallgrass Woodland Type             X 13                      
TPW1-2 CEON000230 Dry Bur Oak - Shagbark Hickory Tallgrass Woodland Type                               1      
TPW2-1 CEON000156 Moist - Fresh Black Oak - White Oak Tallgrass Woodland Type                                      
TPW2-2 CEON000158 Moist - Fresh Pin Oak Tallgrass Woodland Type                                      
  CEON000322 Black Spruce - Tamarack - Leatherleaf Patterned Fen Type                             3        
S. Ont ELC code ELCODE Common name S.D.G. Thunder Bay Toronto Victoria Waterloo Wellington York
ALO1-1 CEGL005192 Dry Lichen-Moss Open Alvar Pavement Type              
ALO1-2 CEGL005235 Dry Annual Open Alvar Pavement Type              
ALO1-3 CEON000218 Northern Dropseed - Little Bluestem - Scirpus-like Sedge Alvar Grassland Type       3      
ALO1-4 CEON000225 White Cedar - White Spruce - Philadelphia Panic Grass Treed Alvar Grassland Type       2      
ALO1-5 CEON000219 Tufted Hairgrass - Canada Bluegrass - Philadelphia Panic Grass Alvar Grassland Type       5      
ALS1-1 CEON000222 Common Juniper - Fragrant Sumac - Hairy Beardtongue Alvar Shrubland Type       6      
ALS1-2 CEON000221 Creeping Juniper - common Juniper - Shrubby Cinquefoil Alvar Shrubland Type              
ALS1-3 CEON000216 Shrub Conifer - Dwarf Lake Iris Alvar Shrubland Type              
ALT1-1 CEON000220 Chinquapin Oak - Canada Bluegrass - Nodding Onion Alvar Grassland Type              
ALT1-2 CEGL005230 Shagbark Hickory - Prickly Ash Treed Alvar              
ALT1-3 CEON000229 Jack Pine - White Cedar - Common Juniper Treed Alvar Shrubland Type       X      
ALT1-4 CEON000223 White Cedar - Jack Pine - Shrubby Cinquefoil Treed Alvar Pavement       1      
ALT1-5 CEON000226 Red Cedar - Early Buttercup Treed Alvar Grassland Type              
BBO1-1 CEGL005162 Sea Rocket Sand Beach Type              
BOS2-1 CEON000121 Leatherleaf Shrub Kettle Peatland Type         X X X
CLO1-1 CEON000133 Cliffbrake - Lichen Open Unshaded Limestone / Dolostone Cliff Face Type              
CLO1-2 CEON000134 Bulblet Fern - Herb Robert Open Shaded Limestone / Dolostone Cliff Face Type              
CLO1-4 CEGL002048 Open Limestone / Dolostone Seepage Cliff Type              
CLO1-5 CEON000136 Open Limestone / Dolostone Cliff Rim Type              
CLS1-1 CEGL005066 Common Juniper Open Limestone / Dolostone Cliff Rim Shrubland Type              
CLS1-2 CEGL005070 Round-leaved Dogwood Open Limestone / Dolostone Cliff Rim Shrubland Type              
CLT1-1 CEGL002451 White Cedar Treed Limestone Cliff Type              
FET1-3 CEON000117 Gray Birch Treed Fen Type              
FOC4-2 CEON000103 White Cedar - Hemlock Coniferous Organic Swamp Type              
FOD1-3 CEGL005030 Dry Black Oak Deciduous Forest Type              
FOD1-4 CEON000162 Dry - Fresh Mixed Oak Deciduous Forest Type              
FOD2-2 CEON000159 Dry Oak - Hickory Deciduous Forest Type              
FOD2-3 CEON000164 Dry - Fresh Hickory Deciduous Forest Type              
FOD4-3 CEGL005021 Dry - Fresh Hackberry Deciduous Forest Type              
FOD6-2 CEON000178 Moist - Fresh Sugar Maple - Black Maple Deciduous Forest Type              
FOD7-4 CEON000181 Moist - Fresh Black Walnut Deciduous Forest Type              
MAM2-8 CEON000022 Prairie Slough Grass Mineral Meadow Marsh Type              
MAM3-7 CEON000029 Prairie Slough Grass Organic Meadow Marsh Type              
MAM4-1 CEON000016 Graminoid Coastal Meadow Marsh Type     2        
MAM4-2 CEON000017 Shrubby Cinquefoil Coastal Meadow Marsh Type              
MAM5-2 CEGL005139 Perched Mineral Prairie Fen Type              
RBS1-2 CEON000202 Round-leaved Dogwood Limestone / Dolostone Shrubland Barren Type              
RBT3-1 CEGL005046 Pitch Pine Treed Granite Barren Type              
SBO1-2 CEON000153 Hay Sedge Sand Barren Type              
SDO1-1 CEON000126 Little Bluestem - Switchgrass - Beachgrass Dune Grassland Type              
SDO1-2 CEON000127 Little Bluestem - long-leaved Reed Grass - Great Lakes Wheat Grass Dune Grassland Type              
SDS1-3 CEGL005064 Juniper Dune Shrubland Type              
SDT1-1 CEON000131 Cottonwood Dune Savannah Type              
SWT2-8 CEON000057 Silky Dogwood Mineral Thicket Swamp Type              
SWT3-13 CEGL005083 Poison Sumac Organic Thicket Swamp Type         X    
SWT3-14 CEON000072 Huckleberry Organic Thicket Swamp Type              
SWT3-4 CEON000065 Buttonbush Organic Thicket Swamp Type              
SWT3-7 CEON000067 Winterberry Organic Thicket Swamp Type              
TAO1-1 CEON000199 Dry Herbaceous Limestone / Dolostone Talus              
TAO1-2 CEON000200 Wet Herbaceous Limestone / Dolostone Talus              
TAS1-2 CEGL005067 Mountain Maple Open Limestone Talus Shrubland Type              
TAT1-2 CEON000138 White Birch Dry Treed Limestone Talus Type              
TAT1-3 CEGL005172 White Cedar Dry Treed Limestone Talus Type              
TAT1-4 CEON000139 Sugar Maple Moist Treed Limestone Talus Type              
TAT1-5 CEON000140 Basswood - White Ash - Butternut Moist Treed Limestone Talus Type              
TAT1-6 CEGL005190 Hemlock - Sugar Maple Moist Limestone Talus Type              
TPO1-1 CEGL002210 Dry Tallgrass Prairie Type     X   3   1
TPO2-1 CEGL005096 Moist - Fresh Tallgrass Prairie Type              
TPS1-1 CEGL002492 Dry Black Oak Tallgrass Savannah Type     X        
TPS1-2 CEGL005129 Dry Black Oak-Pine Tallgrass Savannah Type     X        
TPS2-1 CEON000155 Moist - Fresh Pin Oak - Bur Oak Tallgrass Savannah Type              
TPW1-1 CEGL005029 Dry Black Oak - White Oak Tallgrass Woodland Type     5   1    
TPW1-2 CEON000230 Dry Bur Oak - Shagbark Hickory Tallgrass Woodland Type              
TPW2-1 CEON000156 Moist - Fresh Black Oak - White Oak Tallgrass Woodland Type              
TPW2-2 CEON000158 Moist - Fresh Pin Oak Tallgrass Woodland Type              
  CEON000322 Black Spruce - Tamarack - Leatherleaf Patterned Fen Type