Variable,Variable Descripttion
PlantID,Sequential number corresponidng to row
SpeciesCode,Sis letter code based on first three letters of genus and first three letters of genus. Unidentified samples are designated as UNKNOWN or by type of vegetaton
Family,Plant Family; null values set to n/a
GenusSpecies,Genus species; null values set to n/a
Genus,Genus; null values set to n/a
Species,species; null values set to n/a
PageNumber RandB,Page number where plant description is found in Rhoads and Block (2007). The plants of Pennsylvania (2nd ed.); null values set to n/a
NativeOrIntroduced,"I = Introduced according to Rhoads and Block (2007); N = Native,; U = Unknown"
Nativity Note,The US Dept. of Agriculture website sometimes disaggrees with R & B on the status of introduced species. Check with Flora of North America (FNA); null values set to n/a
CommonName,Common Name; null values set to n/a
Photosynthetic Pathway,C3 = C3 photosynthetic pathway; C4 =  C4 photosynthetic pathway