Your friend's "hanging iris" is almost certainly Neomarica gracilis, aka walking iris or apostle's iris. Flower stems droop, root at tips, "walking" the plant. Leaves and flowers resemble iris-orchid hybrids. Treat as tender perennial: hanging basket in summer, indoors in winter.
Iris Borer Control: Sanitation, Scouting, and Physical Removal
The Correct Spelling: Crapemyrtle (One Word)
Iris Aphids: Wash Off, Don’t Spray
Siberian Iris Foliage: Don't Cut It—Camouflage It
Why Divided Iris Bloom White: Vigor and Genetics
Hanging a Hammock from Trees: Use a Long Eyebolt, Not a Screw Eye, to Minimize Damage
Vernal Iris vs. Crested Iris: Two Tiny Wild Irises of North Georgia
Iris Seed Pods, Cross-Pollination, and Rhizome Division
Overwintering Pond Iris in Kansas: Which Varieties Survive?
Unidentified Oncidium-Related Orchid: General Warm-Grower Care
Finding Unregistered Cymbidium Hybrids: 'Black Champion'
Iris Leaf Care: Trim Only the Brown, Not the Green
Dividing Bearded Iris in August: Perfect Timing
Walking Iris (Neomarica gracilis) and Reblooming Iris (Iris kochii): Tropical and Hardy Options
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