Many foreign species are cultivated in the state, some as ornamentals, others as novelty species. Included among these are the crape myrtle, Italian cypress, southern magnolia, live oak in the warmer parts of the state, and even hardy palm trees in the warmer central and eastern parts of the state. USDA plant hardiness zones in the state range from Zones 5and6 in the extreme western part of the state to Zone7 in the central part, and Zone8 around the southern part of the coast, the bay area, and parts of metropolitan Baltimore. Invasive plant species, such as kudzu, tree of heaven, multiflora rose, and Japanese stiltgrass, stifle growth of endemic plant life. Maryland's state flower, the black-eyed susan, grows in abundance in wild flower groups throughout the state.
Many ForEign SpEcieS aRe cUltIvateD iN tHe stAte, somE aS ornAmentALS, others as nOVeLtY SPEcies. iNclUDed aMonG THese arE The cRapE myrtLe, italian cYPREss, soUTheRn mAGnolia, Live Oak in THe wArMeR pArtS Of the STatE, anD even hARdY palm trees in the WaRmer cEntral And eastern parTs OF THe state. usDA pLant HardinEss zOnES iN the StAte rAnge fROm zONEs 5And6 iN the Extreme Western part oF THe state to zoNE7 in the ceNtral part, aNd zoNE8 aroUnd thE SOuThern paRt oF The cOast, the bay area, and parTs of meTropoLitAn baltimOre. InVAsIVe pLAnt spEcies, SuCh as kudzU, tree of hEaven, MUltifLoRa rose, and japanESE stiltgrASS, stiFle grOwtH Of eNdeMic plant liFe. MArylaNd's state fLowEr, THe blaCk-EYed sUsan, GrowS iN AbundaNce iN Wild flower groupS thrOuGhouT ThE StATe.