Danish Logo


Rhododendron coeloneurum R. colemanii Til C R. coelicum

Rhododendron coeloneurum (coeloneuron)

 R. coeloneurum. Foto: Gart Wedemire
Foto: Gart Wedemire RSBG

 R. coeloneurum. Foto: Jens Nielsen
R. coeloneurum. Foto: Jens Nielsen
 R. coeloneurum. Foto: Jens Nielsen
R. coeloneurum. Foto: Jens Nielsen

 R. coeloneurum. Foto: Jens Nielsen
R. coeloneurum. Foto: Jens Nielsen

 R. coeloneurum. Foto: Jens Nielsen
 R. coeloneurum. Foto: Jens Nielsen
R. coeloneurum. Foto: Jens Nielsen

R. coeloneurum NN0926. Nice foliage and seems closely related to R. denudatum. This population was mostly growning in boggy condition near a stream. NE Yunnan 1800 m: ARS 678/2010
Jens Nielsen

 R. coeloneuron new growth. Foto: Hans Eiberg
R. coeloneuron new growth. Foto: Hans Eiberg

 R. coeloneuron. Foto: Hans Eiberg
R. coeloneuron new growth. Foto: Hans Eiberg

R. coeloneurum/(R. coeloneuron) (Taliensia) En form der ligger imellem R. floribundum, R. wiltonii, R. denudatum og R. rufum. Kendetegn: Tidligere introducerede planter med dette navn har været R. wiltonii (WEB). Allan Clark's introduktioner er planter i Argyrophylla subsektionen (Argyrophylla). Vildtvoksende i Sichuan, N-Yunnan og N-Guizhou, Kina Hvis blomsterklasen er tæt og ikke løs er det en Taliensa og ikke Argyrophylla. R. coeleunerum har brunt indument, medens arter i Argyrophylla har tæt hvidt (eller pudret) til blankt (agglutineret) lysebrunt indument. H.Eiberg

ARS Flora of China D. Genbank RBGE Herbarium
R. coeloneuron (um) is definitely an Argyrophylla and not a Taliensia in my opinion (most agree). The closely related, 
similar and also recently introduced denudatum has a flatter leaf with a paler indumentum but darker flowers a bit 
later in the season. This latter species is closest to floribundum which has a more northerly distribution, a paler 
indumentum and darker flowers than denudatum. These would all be better compared to argyrophyllum and not insigne which 
is quite different from most of the other species in that subsection. The original “coeloneuron” that was introduced by 
Berg and others was a collection from the Erlang Shan in Sichuan in the early 1990s. This is nothing more than a very 
fine form of wiltonii (as was obvious in Harold’s image) but was mistakenly distributed for many years as coeloneuron. 
It is a bit different from the Omei Shan form of wiltonii which is the form most often seen in cultivation. The Erlang Shan 
form is by far the superior plant, we now have about 20 planted in a new section of the garden here at the RSBG, all 
different clones from wc seed. Beautiful! 

Steve Hootman