Specialized Structures                                    
__________________________________________________________PLB 171 Sp2003__________

PLB 171
 
Visual Material

Specialized Structures

1.Bulbs
2.Corms
3.Tubers
4.Tuberous Stems
5.Rhizomes
6.Pseudobulbs
7.Tuberous Roots

 

   
Corms

freesia gladiolus gladiolus gladiolus

 


Corms

Solid modified stem consisting of a swollen base of a stem axis enclosed by dry, scalelike leaves. Also have fi-brous and contractile roots. Example: gladiolus


Methods of propagation

1. New corms- A new corm forms at the base of the shoot axis, forming on top of the old corm.
2. Cormels- Miniature corms that form between the old and new corms. Produces foliage only during first season. Then forms a new corm at base of stem axis as in normal corms. This corm itself requires about 2 years to reach flowering size.
3. Division - Cut large corm into pieces, each having a bud.

Click the images

Instructor: Ellen Sutter, 
Professor, Dept. of Pomology
E-mail: egsutter@ucdavis.edu
Phone: 752-0925


























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