One of the best sources of Orobanchaceae photos around.

[Weiser]

Mark Egger's exceptional and extensive collection of Orobanchaceae photos is amazing. I use it as a reference often. I hope you all enjoy browsing through it.
You will also find nice smaller sets of photos from Family Phrymaceae, Family Calceolariaceae, genus Calochortus, genus Penstemon, genus Delphinium, genus Aquilegia, Family Lamiaceae, Family Orchidaceae.   

http://www.flickr.com/photos/mark_egger_castilleja/

[McDonough]

Thanks John for this excellent link; it has extensive galleries on other plants families too, most beautifully photographed.  Could easily spend hours scouring through the galleries. 

[Weiser]

I've spent many a happy hour browsing it my self.

Here is another link to a group on flickr their disscusions and links to information are good. Should only take you a few more hours to get through it.

http://www.flickr.com/groups/orobanchaceae/discuss/