The term greater knapweed is identified in base64 scheme by the sequence Z3JlYXRlciBrbmFwd2VlZA==, while the MD5 signature is equal to 6dccf9695e3c362ba66a2ef10ee5ddb9. The ASCII encoding of greater knapweed in hexadecimal notation is 67726561746572206b6e617077656564.