If you click on "edit data details" on the page for any entry in the database, you'll see a form showing the types of information required.

http://garden.org/plants/propo...

If there is enough information that applies to every single Ziziphus, Dave can turn the genus entry into a parent plant and add that information to every Ziziphus in the database, but it really isn't necessary to have a "parent plant" for every genus.

As for the lack of documentation, that could be a problem as far as our database is concerned. We usually wouldn't add undocumented cultivars to the database unless the cultivar names were accepted by several sources. Typically, people tend to spell the name of an undocumented cultivar in several different ways and may apply the same name to several different plants.

zuzu thank you for giving me your valuable time. Now that document that you have pointed out is general in nature. If I fill three documents for three different Ziziphus, what exactly will be different? Unless there is some thing about the anatomy of the plants where the difference will stand out, the rest is exactly the same. Grow it in America, Africa, India or any where when I finish completing that document every thing even to that perfect "T" will be the same.
There has to be some way other then photographs and flower difference( a perfect way out for Roses and Daylilies).
Regards,
Masud.

Ziziphus nummularia is a prostate bush. Make an entry on form.
Ziziphus zizyphus is a tree. Now change the top entry?
Regards,
Masud.

There must be differences in height and perhaps in foliage and bloom color.

The "parent plant" entry is typically used for genera with hundreds or thousands of plants listed. It's an easy way to add information to many plants at one time. The Ziziphus genus has only 53 plants listed, and some of them appear to be synonyms or invalid names, so it's hardly worth composing a parent plant info sheet.

The Ziziphus zizyphus entry, for example, has to be fixed. GRIN taxonomy is kind enough to make it a synonym of Ziziphus jujuba var. jujuba, but ITIS doesn't even extend it the courtesy of calling it a synonym. It says Ziziphus zizyphus is a rejected name.

Some parts of my earlier post will make no sense now, Masud. I just redid the Ziziphus page and deleted two synonym entries, so the total count is now 51 rather than 53.

http://garden.org/plants/brows...
zuzu it seems we have two genus? Please click the link.
Regards,
Masud.

Is one mis-spelled?

Yes, Masud. The Zizyphus is misspelled. Thanks for finding it. It should be Ziziphus.

Those entries came from The Plant List. It's exhibiting more and more problems as time goes by. It routinely treats misspelled genera as the real thing. It lists Ziziphus and Zizyphus as separate genera, for instance, and it also lists Buddleia and Buddleja as separate genera. Maybe we should stop thinking of it as a reliable source.

Maybe it is because I post from some other part of the globe and visit those plants which normally no one else does.
Now how does one distinguish between two plants posted into the Genus dump? In photographs the leaves look the same, flowers also look the same and fruits other then oval, round, oblong also look the same. Except to hang a straight edge, ruler, scale what else can be done, write NOID cultivar in the comment box?
It came into being from a being, it did not come into being from a non being. Trying to find that being will be like looking for a needle in an haystack.
Regards,
Masud.

There's two genus Ziziphus entries, one at the top of the list, the other at the bottom.

Ziziphus 'Show Berri'

Ziziphus

http://garden.org/plants/brows...

The one at the top is the genus entry and the one at the bottom is a cultivar named 'Show Berri,' Janet.

Duh, it looked to me like it was a common name!

Arif, to add to what Zuzu has said about the differences between a parent plant and a general genus entry, trying to find reliable information consistent across the genus is often a challenge. One of the benefits of the parent plant entry is that data points are automatically added to all new database entries for that genus. One of the places I visit is eFloras to try and find this consistency.
http://www.efloras.org/florata...
Unfortunately consistency within our data points seems to be....limited....for Ziziphus.

Show berri Janet is also the common name. In an uneducated country there is not much of record keeping and the government has defaulted on all obligations except ________. Not for plant forum but it is relevant when private individuals take/make initiative.
Plus confusion in plant world "The official name is now Yucca guatemalensis and Y. elephantipes is now a synonym as is an even older name, Y. gigantea." That will be my next target and I think the database might still have the elephant in the cabinet.
I might visit Arid Research Institute Chakwal which conducts fruit tree research. The Arid Research Institute Rawalpindi is into crops and the Arid Research Institute Faisalabad ex.Montgomery is into desert plants. Tandojam is into desert crops. Private nurserywallas still apply thumb mark to documents so that is a lost cause, from them I get Folk Tales which also do have relevance to Historians but don't have the time to go into Tales.
Regards,
Masud.

You could run into an argument over that Yucca, Masud. According to ITIS, Yucca gigantea is the accepted name as of 2011, and Y. guatemalensis and Y. elephantipes are mere synonyms of Y. gigantea. Do you have a more current source?

Argument over botanical names? That's not possible. I don't think I can find any two in agreement.
"Features
There are some 40 species of yuccas, all from North and Central America. Yuccas require a specific moth for pollination, and if the right moth isn't around, you won't see fruit develop even though the plant produces flowers.

This species is apparently in the midst of a name change. The official name is now Yucca guatemalensis and Y. elephantipes is now a synonym as is an even older name, Y. gigantea. Floridata will keep the old name for a while until we hve a better way to manage botanical synonyms in our database.

Steve Christman 12/16/02; updated 2/19/04"
http://www.floridata.com/ref/y...

Nothing current, zuzu yours seems more current and more plausible.
Regards,
Masud.

Sooooo, as I thought Show Berri was a common name (probably through you Masud ), is this really a cultivar or just mistaken for a cultivar? Where does one find a list of Ziziphus cultivars? It appears that Ziziphus mauritiana is common in warmer climates.

the Indian jujube, Z. mauritiana Lam. (syn. Z. jujuba L.) is adapted to warm climates

In India, there are 90 or more cultivars

http://www.hort.purdue.edu/new...

Janet if I remember correctly, it was you all only who set up this filing system in the Sub Continent. You tell me.
Names of plants and the fact India has 90+ cultivars don't help . Please give me the data to compare, pretty please
Regards,
Masud.