Could this possibly be Dietes grandiflora? According to San Marcos Growers, "This plant has been long grown as Dietes iridioides or D. vegeta in the nursery trade but is rightlyfully Dietes grandiflora. This can be determined by examing the flower tepals and style arms; Dietes grandiflora has brown markings on the inner tepals and dark violet style arms where Dietes iridioides lacks markings on the tepals other than the yellow spots on the outer tepals and has pale violet style arms." - ref: http://www.smgrowers.com/produ......

and the Queensland Government @ http://keyserver.lucidcentral....... " (photo of D.iridioides at the bottom of the page) as well as:
http://keyserver.lucidcentral....... - photo of D.grandiflora at the bottom of the page."

Two of the above links didn't work for me so I looked them up and will post them here:

D. iridioides: http://keyserver.lucidcentral....

D. grandiflora: http://keyserver.lucidcentral....

Here is the third link: http://www.smgrowers.com/produ...

I apologize for the confusion. Thank you so much, Lin., for providing the other 2 links

Some other helpful links. eMonocot are botanical descriptions so maybe a little tooo much information. All appear to confirm the spots are on D. grandiflora. Bloom longevity is interesting too.

http://e-monocot.org/taxon/urn...
http://e-monocot.org/taxon/urn...

http://www.plantzafrica.com/pl...
http://www.plantzafrica.com/pl...

OldGardener, you are very welcome ... I couldn't find the second one, that's why I didn't post it.

I think we all agree that OldGardener is correct. I haven't seen Ferenc on this site for a long time, so if he doesn't respond in the next day or two, I'll move the photo without his consent.

I've moved the photo to the D. grandiflora entry. Thank you, OldGardener, for the correction.

Thank you, Zuzu, for all of your help. Lin and Evan, thank you for going above and beyond, too.