Carl Julius Meyer von Klinggräff (26 March 1809 in Klein Watkowitz in Kreis Stuhm – 1879) was a German botanist.
Following graduation, he traveled to his parents' home near Zagreb, and on the journey, conducted studies of Alpine flora and plants native to the Adriatic coast.
He visited Fiume, Trieste, islands in the Gulf of Quarnero and made the acquaintanceship of botanists Bartolomeo Biasoletto, Friedrich Wilhelm Noë and Mutius von Tommasini.
During his career, he made numerous trips throughout the Province of Prussia, and in 1844, took an extended journey to Austria, Switzerland and northern Italy.
[1] He made major contributions to the knowledge of Prussian flora, conducting research in the fields of phytogeography, plant systematics and climatology as it pertained to botany.