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Re: Leaf unfolding

  • Subject: Re: Leaf unfolding
  • From: brian lee <lbmkjm@yahoo.com>
  • Date: Sun, 27 Jul 2008 08:15:40 -0700 (PDT)

Dear all,

Aloha. 

Now I am confused.  I would defer to Julius or Pete before accepting my statement.  Off the top of my head, I convinced myself I knew of what I spoke...but reading Julius and Pete...I am mistaken.  I certainly need tp upgrade my vernation information.

Aloha,

Leland


--- On Sun, 7/27/08, brian lee <lbmkjm@yahoo.com> wrote:

> From: brian lee <lbmkjm@yahoo.com>
> Subject: Re: [Aroid-l] Leaf unfolding
> To: "Discussion of aroids" <aroid-l@gizmoworks.com>
> Date: Sunday, July 27, 2008, 4:22 AM
> Dear Marek,
> 
> Aloha.
> 
> Convolute vernation is the unrolling of the leaves where
> the blade margins are curled inward towards the midrib. So,
> if your drawing shows the top of the leaf as the top of the
> illustration, it is upside down. In your photos, it would
> be rolled adaxially or toward the central plant axis. 
> Contrast this with revolute leaf margins where the blade
> margins are rolled to the underside of the blade.  Notice
> that I did not say revolute vernation.  If we were
> discussing revolute leaf margins, your left image  would be
> a cross section of this.
> 
> Involute simply means rolled along the longitudinal axis,
> so when applied to vernation or the unrolling of the
> emerging leaf, it resembles a shell spiral in cross
> section....as in your drawing.
> 
> I will not go into this, but, another type of
> vernation....which is seen in cycads of the genus, Cycas,
> is circinnate.  I love watching new leaves unfurl.
> 
> Aloha,
> 
> Leland
> 
> 
> --- On Sat, 7/26/08, Marek Argent <abri1973@wp.pl>
> wrote:
> 
> > From: Marek Argent <abri1973@wp.pl>
> > Subject: [Aroid-l] Leaf unfolding
> > To: "Discussion of aroids"
> <aroid-l@gizmoworks.com>
> > Date: Saturday, July 26, 2008, 1:01 PM
> > Hello,
> > 
> > Which of them is convolute and which involute? Is it
> > correct what I drawn?
> > 
> > Marek_______________________________________________
> > Aroid-L mailing list
> > Aroid-L@www.gizmoworks.com
> > http://www.gizmoworks.com/mailman/listinfo/aroid-l
> 
> 
>       
> _______________________________________________
> Aroid-L mailing list
> Aroid-L@www.gizmoworks.com
> http://www.gizmoworks.com/mailman/listinfo/aroid-l


      
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