Intergeneric Hybrids

Jim Lykos
Mon, 07 Jun 2004 21:21:59 PDT
Hi Mary Sue,

Hopefully  Hippeastrelias will become more frequent visitors to our 
gardens - and I  think that we can assume that they will all  have a 
different Hippeastrum parents, and some of them may also hail from 
different Sprekelia species - adding to the complexity of really knowing 
their origins.
I've  come across many intergeneric hybrids amongst orchids and as with 
all plants the intergeneric hybrid name is by international botanical 
rules a  fusion of  the two genera names.  This fused name then takes 
the place of  the two genera , so the new generic title is used together 
with a  cultivar  name.  That is assuming that the breeder or  the 
person who raised the intergeneric hybrid has its cultivar name  
registered, or that its name comes into print and common use.

Using the the examples you gave - xAmarygia (Amaryllis/Brunsvigia)  
follows botanical nomenclature wheres  the earlier intergeneric name of  
Brunsdonna doesnt as its a generic (Brunsvigia) and  species 
(belladonna) combination.  
Hence if we pick on a few well known white flowered xAmarygia - we have 
cultivars (cultivated varieties) such as:
xAmarygia parkeri
xAmarygia Hathor
xAmarygia  Frank Leach
or in the instance of  a  developed and notable strain :
xAmarygia Multiflora  Alba
xAmarygia Multiflora  Harbord
Its quite likely that  two to three Brunsvigia species were used in 
creating some of these white xAmarygia cultivars.

In the instance of  xAmarcrinum,  the hybrid cross using  Amaryllis 
belladonna and Crinum moorei was named  "Amarcrinum howardii"  and had 
an earlier name of  Crinadonna corsii.  When the IBS was registering 
these hybrids and printing their names in Herbertia journals  -  
different Crinums species were used, however, most of  these cultivars  
have identities that  are now largely forgotten.
As I have found from experience in Camellia cultivar registration, it is 
pointless to register a new cultivar unless there is an intention to 
propagate or widely distribute this cultivar to aid in this preservation 
and identity over time. Otherwise its name is epthermal and disappears 
with its raiser.
If different Crinum species are used to cross with  Amaryllis then the 
hybrids would need to be registered to acquire official  cultivar 
names,  otherwise the only way to preserve the identity  of  the cross 
is its full name eg.   Amaryllis belladonna x Crinum macowanii.
However,  if a third genera is used  eg  xAmarygia  X   Crinum  then the 
person registering this more complex hybrid for the first time can  
create a  totally new genera name that doesnt require genera name 
fusions. Obviously this would only come into use if there is a Plant 
registration authority who accepts this new  hybrid genera name.

This leads to a further question who now are the registration 
authorities for new bulbous hybrid plants?  The  situation is more 
complex than that of orchid  hybrids which are registered worldwide  via 
RBG Kew. Most countries have plant cultivar registration authorites but 
some genera have specific international  registration societies. For 
instance, the Clivia Society of South Africa is the Clivia hybrid 
registration authority.  Is it still correct that  the IBS is  the  
registration authority for Hippeastrum hybrids?

Jim Lykos
Blue Mountains

Mary Sue Ittner wrote:

> Dear All,
> Can someone explain the correct or customary way of naming 
> intergeneric hybrids? Long ago we discussed how we might create wiki 
> pages for them and Mark Mazer, Mark McDonough, and I decided we'd name 
> the page with the name for each one and then link that page to both 
> genera that were involved. No one has added any so I haven't had to 
> figure out what to call the page. In John Bryan's latest book he lists 
> these three:
> xAmarcrinum -- the name used for hybrids between Amaryillis belladonna 
> and Crinum moorei. Does this mean if there was another cross with 
> another Crinum it wouldn't be included in this name?
> xAmarine -- the name used for a combination of Amaryllis belladonna 
> and Nerine species or hybrids
> xAmarygia -- intergeneric hybrids between Amaryllis belladonna and 
> Brunsvigia.
> Are there others or a way to name those that aren't recognized by a 
> common name as the ones above?
> When I got back from my trip to my surprise blooming in my greenhouse 
> from Bill Dijk seed was a cross between a hybrid Hippeastrum and 
> Sprekelia. It was/is very pretty and I would like to add it to the 
> wiki if I can figure out how to name the page.
> I was rather amazed by this since I can't get Sprekelia to bloom at 
> all and keep threatening to toss the ones I have. Lee Poulsen says 
> that cultivar, Orient something is fool proof and long blooming so I 
> bought one in Southern California and it hasn't bloomed either. And my 
> luck with regular easy Hippeastrums isn't very good either. So 
> normally I pass on them, but this was seed from awhile ago. The seed 
> was labeled H. stylosum (mistake somewhere) and I had treated it like 
> that was what it was following instructions that someone supplied for 
> how to grow the different species. So I watered it and fertilized it 
> certain months and kept it completely dry for the winter months and 
> started watering when I was supposed to. Never did I expect it to 
> bloom. What an exciting welcome home present.
> Any help will be greatly appreciated. Thanks.
> Mary Sue
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