Over the years I've collected a decent amount of hardy citrus information including articles that I believe have gone to the wayside. I thought it might be important or at least interesting to share some of this information. Here is a rare article from the notes of the late citrus pioneer John R Brown, MD where many varieties are mentioned such as:

Citemple edible
SanCitChang
Dimicelli
Sanford Citrumelo hybrids
Citradia
CiClem
Taitri

Sorry about the poor scan quality. I tried to do a OCR translation but could not get it to convert.

http://www.scribd.com/doc/138537543/Hardy-Citrus-of-Texas

Part 2 which talks about varieties such as:

Nameiwa
Clustermondin
Meyerquat
NameiMQ
CiChinotto
NameiYuzqat
ChangshaYuzu
Citrumelo x Changsha
Changsha x Ichangenis
Clementine x C. ichangensis
YuzSavange
ClemYuzu
Kat
TriYuz
Thomasville x yuzu

http://www.scribd.com/doc/138542257/Hardy-Citrus-of-Texas-Part-2

Thanks a lot!

Here are another couple of interesting articles. The first of which is by another citrus guru, J. Stewart Nagle.

The following citrus varieties are talked about:

OP Nagami
Yuzuquat
Marmaladequat
Ten degree tangerine
Thong Dee Notto

The second short article is by William B Champan and John R. Brown MD about the illusion of cold-hardiness in Ermocitrus

http://www.scribd.com/doc/138564018/New-Noteworthy-Citrus-From-Texas

Thanks. Much appreciated.

Thanks Eyeckr! Great info, keep it coming.

Thanks G, just ran across this today...more great resources to read. Much appreciated.

You're welcome folks. I just hope it can be useful to those interested in learning about certain hardy varieties or even those interested in doing citrus breeding of their own. Stay tuned. More to come tomorrow...

Also thanks to the mod for the help with posting a preview page of each pdf!

eyeckr,

thanks a lot! Great info, much appreciated.

Thank you very much, this is an information that I was looking for for a long time.

Thanks a lot G! Fantastic info, much appreciated!

Here is an article dedicated to describing the Sunquat and its clouded origins by Alfred R. Loeblich III PHD and Luis G. Walden:

http://www.scribd.com/doc/138681550/Sunquat

The following study by J. Stewart Nagle PHD looks into the effects of cold weather on citrus:

http://www.scribd.com/doc/138684940/Cold-Hardiness-as-a-Key-to-Citrus-Categories

Next is a collection of excerpts from the now almost impossible to find Citrus for the Gulf Coast booklet by J. Stewart Nagle. I almost forgot about this. I was recently questioning a couple of the below varieties and it was good to re-read about them. I was thinking that Australian grapefruit was the same as Goutoucheng and about the relationship between Ponkan and Pon Koa. Here you will find descriptions of:

Australian grapefruit
Golden grapefruit
Bloomsweet
Ponkan mandarin
Pon Koa mandarin
Long Huang Kat
Sunkat or Sunki

http://www.scribd.com/doc/138688256/Citrus-for-the-Gulf-Coast

My respect for the materials! Thanks!