Hmm, which parameters are you checking? When I check the box for "Fragrant" in the Flowers field, it shows 4762 results.
http://garden.org/plants/group...[68]=&text[69]=&text[70]=&text[273]=&text[66]=&text[63]=&box_other[725]=&text[161]=&text[292]=&box_other[1370]=&box_other[1371]=&box_other[1372]=&box_other[1373]=&box_other[1374]=&box_other[1375]=&box_other[1376]=&box_other[1377]=&box_other[1378]=&box_other[1379]=&box_other[1380]=&box_other[1381]=&box_other[1382]=&box_other[1383]=&box_other[1384]=&box_other[1385]=&box_other[1386]=&box_other[1387]=&box_other[1388]=&box_other[1389]=&box_other[1390]=&box_other[1391]=&box_other[1392]=&select[2]=&select[4]=&select[186]=&text[5]=&text[290]=&text[291]=&text[6]=&box_other[652]=&box_other[789]=&box[10][64]=on&box_other[790]=&box_other[41]=&box_other[42]=&box_other[43]=&box_other[728]=&box_other[77]=&box_other[81]=&box_other[82]=&box_other[83]=&box_other[84]=&box_other[85]=&box_other[90]=&box_other[648]=&box_other[111]=&box_other[108]=&box_other[996]=&box_other[1511]=&select[317]=&text[314]=&submit=Search!
(if you copy and the paste the entire string above directly into your browser, it should show my search results)
That can be narrowed down a lot by going to the Fragrance Field and checking particular boxes. For example, if you check the box for "Sweet", you should get 2553 results. If you check the boxes for "Sweet" and "Pronounced", you should get 599 results etc.
Don't check all of the boxes in the Fragrance Field at once, though. If you check the boxes for "Spicy", "Sweet", and "Musky" at the same time, the search engine looks for an iris that has a spicy, sweet, AND musky fragrance and there aren't any iris registered that way. Basically, every time you check a box, it narrows the search parameters. Hope that helps?