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R. columbianum	R. diversipilosum	R. groenlandicum	R. hypoleucum
R. neoglandulosum	R. subarcticum	R. subulatum	R. tolmachevii
R. tomentosum

         Subsection Ledum
 
                       R. diversipilosum (Nakai) Harmaja, 1999.	(3N/4N)             
                       R. groenlandicum (Oeder) Kron & Judd, 1990. (3N/4N)
                       R. hypoleucum (Kom.) Harmaja, 1990.	(3N/4N)
                       R. neoglandulosum  Harmaja, 1990. 	(3N/4N)
                       R. subarcticum  Harmaja, 1990	    (2N / 3N)
                       R. subulatum (Nakai) Harmaja, 2002. 
                       R. tolmachevii Harmaja, 1990. 
                       R. tomentosum  Harmaja, 1990	(3N/4N)
		       R. (x)columbianum (Piper) Harmaja, 1990. (2N)  This species is diploid, so it is probably a species and not a hybrid.

        
DNA conncentration (ploidy N) by 	João Loureiro, Portugal	

Rhododendron columbianum is indeed a diploid species

Robert MacIntyre provided us another sample of Rhododendron columbianum. It appears that Rhododendron columbianum is indeed a 
diploid species and is the not a hybrid of the other 2 western ledums that both tested as tetraploid. John Perkins




 Ledum Taxonomy  Kristian Theqvist



Vælg Arten der begynder med bogstavet,.......... Flora of China: A

	

	
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