I'm surprised no one has mentioned it yet.

The Orchid Digest is where you should be.

http://www.orchiddigest.com/

$32/yr or $60 for 2 years.

Granted, it's only published 4 times a year, but the magazine is so heads
and shoulders above the AOS magazine that there's almost no comparison. The
final issue of each year is always a larger special issue that goes in-depth
into a topic. The final issue for 2005 was a romp through orchid color
forms. Recent special year-end issues have seen comprehensive treatments of
the genera Phalaenopsis, Cattleya, and Phragmipedium. I refer to each of
those regularly.

-Eric in SF
www.orchidphotos.org