Sorry Spammy Davis, Jr. but you have already jumped to wrong conclusions and
that does not help.
The rootstock of Dioscorea is a tuber not a corm. A corm is covered by a
tunic but a tuber is not.
Dioscorea is a huge genus and even includes a number of cold hardy species.
The "Sweet Potato" Ipomoea batatas is a "Morning Glory" with tuberous roots.
I Don't Like Spam <nobody at ibm.com> wrote in message
news:1ait3vc1horkuisq67hljgo2v2tia0433s at 4ax.com...
> In article <v3rh869esm5ha5 at corp.supernews.com>,
> blair <blair863 at hotmail.com> wrote:
> >I was at somebody's house once and they had a big sprawling plant with
> >shaped leaves. They said that they grew it by putting a relative of the
> >family into the ground and planting it. Apparently you could also plant a
> >yam and grow a different plant as well.
> >Does anyone know what this plant is?
> When I was in college, a friend planted a sweet potato in a pot and
> let it grow. Later she told her room-mate that it was a "heart-shaped
> wandering jew". This was believed until an energetic pet knocked the
> pot over, breaking it, revealing the true nature of the plant. As
> mentioned earlier, sweet potato is in Convolvulaceae, with morning
>> I wouldn't have brought this up, except sitting on my window sill here
> at work is a member of the yam family Dioscoreaceae, _Dioscorea
> macrostachya_, (dormant right now) the leaves of which are very
> similar to the heart shaped leaves of sweet potato. This grows from a
> large corm that is quite interesting in appearance. In nature this
> corm is hidden underground, but when sold as a houseplant, the organ
> is kept above ground for show (some of the larger, older ones resemble
> a tortoise shell, at least if you have an active imagination).
>> So, before we jump to conclusions about exactly what the plant is,
> there ARE some members of the yam family kept as houseplants that fit
> your description (although, in general, they are a bit pricey, and not
> very common except perhaps through specialty succulent dealers).
>> Sweet potatoes as sold in the US, often called yams (oh the wonders of
> misleading common names). Ask your friend if they could allow you to
> take a look at the underground stem by brusing away a little soil. If
> it looks like a sweet potato, it probably is. Otherwise, my Dioscorea
> has a THIN, SINGLE, TOUGH twining vine that comes from the TOP of a
> CORM-like structure. If I recall correctly, a sweet potato would
> likely have SEVERAL sprouts coming from a VARIOUS POINTS along a
> HORIZONTAL TUBER, and those sprouts would tend to be more FLESHY or
> SUCCULENT, at least close to the tuber.
>> Hope this helps.