Roof Iris, Wall iris, Japanese Roof, White Root Iris

Iris tectorum

Physical Characteristics

Iris tectorum is an evergreen Perennial growing to 0.3 m (1ft) by 0.5 m (1ft 8in) at a medium rate. See above for USDA hardiness. It is hardy to UK zone 6. It is in leaf all year, in flower from May to June. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects. The plant is self-fertile. Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil and can tolerate drought.

Distribution

E. Asia - China, Japan.

Habitats

Cultivated Beds; East Wall. In. South Wall. In. West Wall. In.

Edible Uses

Edible Parts: Root Edible Uses: Root - an edible starch is said to be extracted from it[2, 105, 177]. Some caution is advised since there are reports that the plant might be poisonous. Perhaps the extracted starch is edible.

Medicinal Uses

None known

Known Hazards

Many plants in this genus are thought to be poisonous if ingested, so caution is advised[65]. The roots are especially likely to be toxic[238]. Plants can cause skin irritations and allergies in some people[238].