Fukien Tea, where do you really come from in China

Hello All,

I prefer to know exactly where a tree or shrub comes from, in order to care for it properly.

Ehretia microphylla - http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl?14898

says - Guangdong [s.], Hainan [ is this the Fujian provence as listed by others on the Internet ?]

China hardiness map - http://www.oocities.org/zhuzi.geo/Hardines.JPG
zone 10 to 11 - 30 deg.F [ -1.1 deg.c ] to above 40 deg.F [ 4.5 deg.C ].

HMMM able to handle snow ?

However this is how the weather is listed - http://www.chinahighlights.com/guangdong/weather.htm
So it is able to handle frost for a short period. a few days ?

My grandfather came from around Guangzhou and said the area had a proper 4 seasons.

Here is a physical map of the area, notice the heights -

http://www.chinatouristmaps.com/assets/images/chinamaps/topography-of-guangdong-guangxi-hainan-hongkong-macao.jpg

Note also where Fujian sits.

So do I look at the Fukien tea as a shrub from the flatlands ?

Hee hee the new book on Penjing lists Sageretia as being exhibited in winter - leafless.
Love how folk toss around the word Tropical so lightly.

Ever wonder why I became an imaginative multi-figurative with involved backgrounds painter and why I enjoy research so much - chuckle.
Later.
Khaimraj