Japanese name: オオニワゼキショウ（大庭石菖） Scientific name:Sisyrinchium micranthum
[Overview]
An annual or short-lived perennial 10–60 cm tall, found in sunny places such as roadsides and lawns.
It has a short rhizome.
The whole plant is hairless; the stem branches at the base and is flat, with narrow wings.
The leaves are linear, 0.2–0.5 cm wide, with very small teeth on the margins.
The leaf bases are often tinged with reddish purple.
Umbel-like inflorescences at the stem tips bear several flowers.
The flowers are 6-petaled, 1 cm across, pale bluish purple; the inner tepals are narrower and smaller than the outer tepals.
The tips of the tepals narrow abruptly to a sharp point.
Compared with Niwa-zekisho, the purple ring in the center of the flower is paler and narrower, and the base is yellow.
The flowers have slender stalks 2.5–4 cm long.
The inflorescence has 2 spatulate bracts.
The fruit is a spherical brown capsule about 0.3–0.8 cm across.
