RE: [Aroid-l] Leaf vein nomenclature

**a san juan k*@yahoo.com**

Ahhh!!!! Thanks to the people who answered...now that
it's explained, it seems so self-evident!

--- Derek Burch <derek@horticulturist.com> wrote:

> This looks much more complicated than it really is.
> Using your example, it
> means that the usual number of veins per side is six
> to nine. But in
> examining a lot of specimens that in all other
> characters fit the species
> description, the botanist found occasional examples
> with as few as five or
> as many as ten veins per side. 
> Particularly when used in a key, this prevents a
> plant being excluded from
> its correct identification because it is aberrant in
> a single small
> character. As I am sure you know, you should always
> read both parts of the
> couplet that makes up that stage in the keying
> process, and select the path
> that best fits the "unknown" plant even if it isn't
> an absolutely perfect
> fit.
> Hope this helps, Derek 
> 
> -----Original Message-----
> From: aroid-l-bounces@gizmoworks.com
> [aroid-l-bounces@gizmoworks.com]
> On Behalf Of a san juan
> Sent: Saturday, June 25, 2005 12:22 AM
> To: Discussion of aroids
> Subject: [Aroid-l] Leaf vein nomenclature
> 
> I was looking at a key for Philodendrons, and came
> upon a numbering system for leaf veins that I'm not
> sure about.
> 
> "primary lateral veins of anterior division
> (5-)6-9(-10) per side"
> 
> What does this mean?
> 
> Thanks for any help!
> 
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