introduction - Pennsylvania Natural Heritage Program

GLOBAL STATECOMMUNITY NAME RANK RANKTERRESTRIAL FORESTS (con’t.):Hemlock – tuliptree – birch forest G? S4Rich hemlock – mesic hardwoods forest G? S2S3Dry oak –heath forest G? S4S5Dry oak – mixed hardwood forest G? S3Red oak – mixed hardwood forest G? S5Northern hardwood forest G? S4Black cherry – northern hardwood forest G? S4Tuliptree – beech – maple forest G? S4Sugar maple – basswood forest G? S4Mixed mesophytic forest G? S1S2Sweet gum – oak coastal plain forest G? S1Red maple (terrestrial) forest G? S5Black-gum ridgetop forest G? S3Aspen/gray (paper) birch forest G? S?Black locust forest G? SWPALUSTRINE FORESTS:Black Spruce- tamarack peatland forest G? S3Red Spruce palustrine forest G? S3Hemlock palustrine forest G5 S3Hemlock – mixed hardwood palustrine forest G? S3S4Red spruce – mixed hardwood palustrine forest G? S3Bottomland oak – hardwood palustrine forest G5 S2Red maple – black-gum palustrine forest G5 S3S4Red maple – black ash palustrine forest G? S2S3Red maple – magnolia Coastal Plain palustrine forest G? S1Great Lakes Region lakeplain palustrine forest G? S1Sycamore – (river birch)- box elder floodplain forest G? S3Silver maple floodplain forest G? S3Red maple – elm – willow floodplain swamp G? S2TERRESTRIAL WOODLANDS:Pitch pine – heath woodland G4 S2Pitch pine – scrub oak woodland G4 S2Red spruce rocky summit G? S1Pitch pine – rhodora – scrub oak woodland G? S1Pitch pine – mixed hardwood woodland G4 S2S3157