I've purchased a dwarf iris called Smart - I've been told it's not valid. This is what Dave's Garden says about it:

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Smart
Hybridized by Innerst; Year of Registration or Introduction: 1990
" View all varieties of Iris

2 members have or want this plant for trade.

Class:
Standard Dwarf Bearded (SDB)

Height:
12-18 in. (30-45 cm)

Spacing:
9-12 in. (22-30 cm)
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)

Hardiness:
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)

Sun Exposure:
Full Sun

Danger:
Parts of plant are poisonous if ingested

Bloom Color:
Fuchsia (Red-Purple)
Purple

Bloom Time:
Midseason (M)

Foliage:
Herbaceous

Other details:
Flowers are fragrant
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Awards (if applicable):
Honorable Mention

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Profile:

Is this the one you are looking for?
Standard Dwarf Bearded Iris (Iris 'Smart')

Iris 'Smart' is on the data base...........Just go to the data base. Type Iris Smart and there it will be. I just checked.

It is a registered cultivar and it already in the database here:

Standard Dwarf Bearded Iris (Iris 'Smart')

Also, just for what it is worth, every registered iris variety should already be listed in the ATP database. The only exceptions are the 2014 registrations. AIS won't officially release those until sometime next spring so ATP has most, but not all, of them. If you are having trouble finding an iris, it's more likely a result of a spelling issue or a quirk in the search engine than of the iris not being in the database.

Going back to the initial post. Who said it wasn't valid?

DG is also a member created database and not always a complete accurate source (so no need to copy it here ) We relied on the American Iris Society for all the registration info which we now also have here on ATP.

Our iris database is accurate and complete unlike ALL other databases out on the web. Ditto with daylilies.