Mystery bulb - Ismene x Festalis?

crinum@libero.it crinum@libero.it
Sat, 18 Jun 2005 00:53:11 PDT
Hi all,
Ismene was segregated from Hymenocallis by Meerow in 1990. The main feature to distinguish the two groups  is just the false stem: in Ismene (including Ismene, Elisena and Pseudostenomesson) the sheating leaves form a long false stem; in Hymenocallis (Hymenocallis and Leptochiton) at the base the leaves can form a short neck, never a long false stem.  Moreover number chromosome (2n=46 commonly  in Ismene; 2n= 46, 44, 40 commonly in Hymenocallis),ovary, seed morphology, distribution....
Alberto
Italy

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From      : pbs-bounces@lists.ibiblio.org
To          : "Pacific Bulb Society" pbs@lists.ibiblio.org
Cc          : 
Date      : Fri, 17 Jun 2005 16:48:43 -0700
Subject : Re: re [pbs] Mystery bulb - Ismene x Festalis?

> Dear Paul:
> 
> I think certain Hymenocallis have foliage that form a 'false' stem by
> the foliage sheathing the stem. Cheers, John E. Bryan
> Paul Tyerman wrote:
> > 
> > At 02:56  18/06/05, you wrote:
> > >Dear Alberto:
> > >
> > >Thanks, I guess the mystery bulb remains just that, a mystery! Cheers,
> > >John
> > 
> > John et al,
> > 
> > This sounds like Ismene x Festalis (Not Hymenocallis, although for some
> > reason in the US in particular Ismene are called Hymenocallis all the
> > time?).  Ismene and Hymenocallis are not the same thing despite this cross
> > usage of the name.  My understanding is that the difference between Ismene
> > and Hymenocallis is the fact that Ismene have the leaves bound together at
> > the base by a sheath, whereas the Hymenocallis have their leaves free
> > immediately they exit the ground.
> > 
> > If memory serves me it was Alberto Castillo who gave this wonderfully clear
> > differentiation about a year or so ago, but I am not sure which list it was
> > on.  I think from memory I kept the email (as I found it so useful to clear
> > up the whole Ismene / Hymenocallis thing) so I can try to dig it up for you
> > if you would like?
> > 
> > I would definitely say that the mystery bulb sounds 100% like Ismene x
> > Festalis as it matches perfectly what we have under that name here in
> > Australia and they are distinctly different from any of the Hymenocallis
> > that I grow.
> > 
> > Cheers.
> > 
> > Paul Tyerman
> > Canberra, Australia.  USDA equivalent - Zone 8/9
> > 
> > Growing.... Galanthus, Erythroniums, Fritillarias, Trilliums, Cyclamen,
> > Crocus, Cyrtanthus, Oxalis, Liliums, Hellebores, Aroids, Irises plus just
> > about anything else that doesn't move!!!!!
> > 
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> 

Alberto Grossi
Italy




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