Iris minutoaurea is a dwarf iris from Korea and northeastern China, with one small golden flower on each very short stem. It doesn't grow wild in the US, and US gardeners report it can be hard to bring into bloom. It's sometimes called small yellow-flower iris.

Appearance

Growth form
A small, clump-forming perennial that spreads by thin . In bloom it stands only about 4–12 in (10–30 cm) tall.
Leaves
Narrow, grassy leaves appear in early spring and keep growing after flowering, up to about 16 in (40 cm).
Flowers
Each stem carries a single bright to pale yellow flower about 1–1.2 in (2.5–3 cm) across, with brown or purple markings on the lower petals. In its home range it blooms in April and May.
Fruit
A round seed capsule forms in early summer.

Look-alikes

Yellow flagIris pseudacorus

Yellow flag is a big wetland iris, 3–5 ft (1–1.5 m) tall with flowers 3–4 in (7–10 cm) across. Iris minutoaurea is under a foot tall with flowers about 1 in (2.5–3 cm) across.

Why they get mixed upBoth are yellow irises, and yellow flag is widespread in the US, where it's considered invasive in a number of states.

Where it lives

Typical habitats
  • forest edges
  • grassy hillsides
Range
Native to the Korean Peninsula and Liaoning Province in northeastern China. It doesn't grow wild in the US.

Growing it

Care
Rare in gardens in Europe, and reported to be hard to get to bloom in the US. It likes humus-rich, well-drained, neutral to acidic soil in sun or part shade, such as a rock garden, and dislikes soggy ground.
Propagation
Usually divided when clumps get crowded.

Conservation

IUCN Red List
NENot EvaluatedNot yet assessed

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Iris minutoaurea — identification & habitat | Moeyo