Title: Species and varieties : their origin by mutation : lectures delivered at the University of California /
Authors: Vries, Hugo de, 1848-1935; Macdougal, Daniel Trembly, 1865-1958.
Publisher: Open Court Pub. Co. ; Kegan Paul, Trench, Trübner,
Year: 1904
Subjects: Plant hybridization.; Plant mutation.; Plants Evolution; Plants Variation