ISSAi was not developed by Logees, and it will grow to 8 feet in the ground. 8 feet is rather small for a mulberry so it is certainly a dwarf. Many dwarf mulberries exist. Well a few. Weeping, and Girardi are a couple of others. Black Beauty is rather small too.
Malus is a genus of crabapples and apples. Which include thousands of plants.
So yeah it is mislabeled. Not sure how that equates to a white mulberry? It may be a crabapple?
I saw no reference for the word Malus, but it certainly could be, but doubtful. False malus or something makes more sense. Or malus-like in latin or greek. I guess you will have to grow it out, if you can keep it alive. Loss of leaves is common when you move a plant. It can recover, or die.
A 3 foot dwarf mulberry in a pot is more common than unusual, as i said it can grow to 8 feet, and that is a big pot, so size tells us nothing.

This post was edited by Drew51 on Mon, Nov 18, 13 at 14:59

Thank you very much Drew
'Malus is a genus of crabapples and apples.' Exactly what I found on the internet. Most references to Malus link to apples and very few linked to 'white mulberry'. That is what confused me.
Most of the deciduous trees here have dropped leaves so I'm not worried about the plant. I'll see what happens next spring when it leaves out. Even if it is a crab apple tree I will be happy. I love its blossoms.
Happy gardening.

Crabapples are nice trees, and really help pollinate apples. A must if you grow apples. Also the ISSAI looks like a really nice mulberry. Fruits can be as large as blackberries.
Mulberry jam is to die for! I actually want an ISSAI,. I'm looking for small mulberries.

Floral: Here is a couple picture. I think it is very possible they mixed morus with malus

The label reads exactly as following:
Malus 'Issai'
Mulberry - ISSAI

Thanks very much

that sure looks like a mulberry. It is not a apple

Strudeldog: Thanks very much. I've been waiting to have a mulberry tree. Can't wait for next year. Happy gardening!

Yes, definitely Morus, not Malus. Someone at the nursery got their genuses confused.

floral, thank you! you all made my day. Changsong

I've been in MN for 14 yrs and have tried to grow a mulberry tree. I've kept one alive for 10 yrs but have only gotten a few small berries off it. Now I've bought a home near Tampa, FL. It's a small yard... about 200' x 250'. Is there a fairly small (8' or so) black mulberry tree with nice big berries?

Betty,
Just Fruits and Exotics has some Mulberries that might be suitable for your area.They don't look to be Morus nigra,but most produce black fruit that are probably very tasty.
Eight feet is fairly small for most Mulberries,but they can be kept in a bush form by pruning. Brady

Here is a link that might be useful: Just Fruits and Exotics Mulberries