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two reasons:
1. the length to width ratio of the larger leaves
especially are greater than 3, which fits P.
stenolobum rather than P. williamsii.
2. the petioles of this plant have a rather smooth
upper surface, which is indicative of P. stenolobum.
Both P. williamsii and P. stenolobum are currently
considered valid species.
--- Russ wrote:
> My recollection of P. stenolobum from the IAS show
> at Fairchild last Sept
> is that all lobes on the leaf are
> extremely narrow and long, and is not the
> philodendron in this picture.
> There was some controversy between
> what I believe is now known as stenolobum and
> another plant then called
> williamsii. P. williamsii, at that time was
> described as having a leaf much
> wider in all parts, tips of all lobes were more
> blunt, and was considered
> the species, while the plant now called stenolobum
> was thought to be a
> hybrid of some kind.
>
> Seems like last year or so someone straightened all
> this out, with the
> magnificently regal narrow leaved plant
> being identified as the species stenolobum, and I
> guess the less attractive
> plant is still williamsii.
>
> Someone help me with this. There were some great
> photos of the large
> stenolobum that won a first in the
> Fairchild show, but I couldn't find them at IAS
> site.
>
> So, based on what I remember, my impression of the
> plant in the photo is
> that it looks more like williamsii than stenolobum.
>
> Russ
>
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