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PLB 171   Home Page Course Schedule Lectures Visual Material Study Guides Bibliography Past Exams WWW Resources    Instructor: Ellen Sutter,   Professor, Dept. of Pomology  E-mail: egsutter@ucdavis.edu  Phone: 752-0925		A. Specialized Structures 1. Bulbs - Tunicate/Nontunicate 2. Corms 3. Tubers 4. Tuberous Stems 5. Rhizomes 6. Pseudobulbs 7. Tuberous Roots B. Layering and Modifications 1. Tip Layering 2. Simple Layering 3. Compound Layering 4. Trech Layering 5. Air Layering