Joseph Francis Charles Rock was an Austrian-American explorer, geographer, linguist and botanist. He was born in Vienna, Austria but moved to Honolulu, Hawaii in 1907, where he became an authority on the flora of these islands. From 1922–1949 he spent most of his time studying the flora, peoples and languages of southwest China, mainly in Yunnan, Sichuan, southwest Gansu and eastern Tibet. Many Asian plants that he collected can be seen in the Arnold Arboretum. Wikipedia
The definitive Wikipedia entry for Joseph Rock. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Joseph_Rock
Joseph Rock was born in Vienna and emigrated to the United States in 1905, becoming an American citizen in 1913. international.loc.gov/intldl/naxihtml/rock.html
Joseph Rock's Images Updated 2004-06-08. The following photographs were taken by the botanist and explorer Joseph Rock, now deceased. pratyeka.org/rock/