Dear Alian,

Nowdays systematics and species delimitation in Alternaria is based primarily on molecular criteria because morphological characteristics proved not to correlate with phylogeny. Please see a paper attached, it's based on molecular study too but contains plenty of figures for different species conidia and sections morphological descriptions which may be helpful for identification.

Best wishes,

Elena

Thanks a lot Elena, I saw that paper. But I need an older key, though not as specific or updated. Maybe Ellis, 1971.

Dear Alian, please, see my message

Dear Alian, 

you can see "Alternaria, An Identification manual. Emory G. Simmons. 2007". It's a very helpful book and based on morphology.

best wishes, 

nassim

Thanks Nassim. I will try to find the boook. 

Hi Alian

you can see "Alternaria Diseases of Crucifers: Biology, Ecology and Disease Management"

Please see:

http://cals.arizona.edu/PLP/pryorlab/pdf/Pryor-and-Gilbertson-2000.pdf

http://shodhganga.inflibnet.ac.in/bitstream/10603/73708/3/12_molecular%20identification%20of%20alternaria%20alternata-7.pdf

http://www.academicjournals.org/article/article1380728657_Xie%20et%20al.pdf

http://www.actabp.pl/pdf/4_2015/2015_1112.pdf

Pelase see:

http://www.mycologia.org/content/94/1/49.full

Thanks a lot Gonzalo.