DR. F. W. WENT THE ORIGIN OF PLANT STRUCTURES BY SELF-ADAPTATION TO THE ENVIRONMENT BY THE REV. GEORGE HENSLOW M.A., F.L.S., F.G.S., ETC. AUTHOR OF "THE ORIGIN OF FLORAL STRUCTURES," ETC. ETC. LONDON KEGAN PAUL, TRENCH, TRÜBNER, & CO. LTM PATERNOSTER HOUSE, CHARING CROSS ROAD |