TWO VOLUME SET - Florula Transiordanica & Florula Cisiordanica. SIGNED BY RIFKA AARONSOHN with DEDICATION to N.Bentwich, dated 30.12.1957 Rebecca Feinberg-Aaronsohn (Rifka; Rivka) (1892-1981), Aaron Aharonsohn`s sister, was one of the founders and leaders of the Nili spy organization, and the fiancée of Avshalom Feinberg (1889-1917). The dedicatee - Norman Bentwich, is a British Zionist, barrister and legal academic, who was the British-appointed attorney-general of Mandatory Palestine. The author - Aaron Aaronsohn (1876-1919), was an eminent Jewish agronomist, botanist, and Zionist activist, who was born in Romania and lived most of his life in the Land of Israel, then part of the Ottoman Empire. He is known as the discoverer of emmer (Triticum dicoccoides), believed to be `the mother of wheat`. Contains many color and b&w plates, fold-out maps and figures. [BOTH VOLUMES]: 225x160mm. 301+432 pages & 12 full-page plates. Yellow cloth Hardcover with gilt lettering on front cover and spine. Cover upper edge bumped. Cover bottom edge dirty. Spine slightly age-stained. Pages yellowing. [VOL.I]: Front cover slightly stained/age-stained. Spine bottom edge slightly bumped. Rivka Oppenheimer`s signed dedication on front whitepage. [SUMMARY]: This extremely rare two volume botanical survey of the Holy Land by an influential botanist and Zionist, signed by his illustrious sister, is in good condition.