Help! Plant list needed desperately!

Hi everyone.
I am rather new to permaculture. I have an 85Ha farm in the Eatern Cape of South Africa and want to start off with a 1Ha permaculture food forest. 

My problem is - even though I've got lots of reading material and videos - that I can't seem to find any good sources for plants suitable to thos area.
 It is a harsh environment with annual rainfall of 350mm (Oct to March), temperatures range from-15°C in June to 35 in Dec and often high winds of up to 50km/h. 

Can somebody please help point me in the right directions? 

Thanks

General info:
http://www.southafrica.info/about/animals/flora.htm#.U6HuIK6Vviw

This one should help a lot:
http://foodplantsinternational.com/

A good list:
http://www.plantzafrica.com/frames/plantsfram.htm

Advanced search:
http://posa.sanbi.org/searchspp.php

may or may not be useful:
http://en.wikipedia.org/wiki/Category:Garden_plants_of_Africa

At -15C that is a zone 7 (5F).

You can grow: Apricot Hazelnut Almond Jujube Autumn Olive Mulberry Grapes Walnut Figs Gooseberries.
The plants above dont mind the winter cold or the summer drought.

With enough water you can grow pretty much anything that can survive a zone 7.
Check out this link for a few common plants that can be found in a zone 7 food forest in USA
https://www.onegreenworld.com

Besides permaculture knowledge you need some good books about fruit trees. You need to consider, rain, when it rains, soil, etc.
Olives maybe? Figs?

Pfaf.org has a good plant list. in the advanced search you can search by zone, But as this feature is new not all plants are catagorized into a zone quite yet.

Thanks guys, I will check out these resources.

Does anyone know of a person(s) who have successfully pulled of a permaculture / foodforest project in similar climate?

South africa permaculture site

this may help

Hi Hannes,
I was interested in your request as my family will be returning to SA next year and are planning a food forest too! Have you had any joy sourcing species? If so, how is your forest looking?