Arum
Studio Pozzi Taubert (Fri, 06 Apr 2007 13:41:20 PDT)

I think I haven't understood what you mean by cultivar.. but " A.
marmoratum " grows wild near my house....

Here in the wild, on our hills, we can see Arum plants with plain
green leaves,( the veins may be sometimes pale green), usually with a
smooth surface of the leaf which is a bit tender.. they usually
whiter and disappear in winter (also in this mild winter they
disappeared in December and have begun sprouting two months ago) ;
we can find just near them a different plant: "A. marmoratum " with
marked stripes on the veins from white to yellowish ( ivory), and the
leaf is stronger and not so smooth but waved. Theese leaves can
survive the whole winter even with a thick layer of snow covering
them, the new leaves appear later ( the plants began producing new
leaves fiftheen/twenty days ago); the spathe is able to last some
days more than those produced from the former plant and the colour is
creamy while the first is whitish.

I never saw in the woods a plant with intermedium characters, ( this
of course, doesn't mean that such hybrids do not exist, but I am
sure it isn't so easy they can appear and survive in wild) .

We can find at last two different plants, a smaller one just high as
the two above ( 40/50 cm) with white or grey-white spots on the
leaves and onother plant much taller (70/80 cm) with similar spots on
wider leaves, with bigger spathes and bigger tubers; we usually
call theese two plants " A. maculatum ".

Arum pictum, ( a nice name ), isn't acceptable in my opinion... as
it is generic and doesn't explain the different patterns on the leaves.

All perfectly hardy here.

Hoping this can help....despite my English.

Giorgio Pozzi
Travedona (Varese)
Northern Italy
zone 8 this warm winter