Data provided by the participants of the Consortium of California Herbaria

View additional distribution information on the Jepson eflora

Juncus uncialis is a species of rush known by the common names twelfth rush and inch-high rush. It is native to the western United States, where it is known from wet habitat such as vernal pools. This is a petite annual herb forming dense clumps of hair-thin green stems no more than 3 or 4 centimeters high. The inflorescence is made up of a single tiny flower atop each stem. The flower has several reddish segments about 2 to 5 millimeters long wrapped around the developing fruit.

Plant type

Grass

Size

2 in Tall

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Color

Red

Plant communities

Foothill Woodland, Valley Grassland, Wetland-Riparian

Caterpillars
Butterflies

Butterflies and moths supported

0 confirmed and 5 likely

Confirmed Likely

Mottled Marble

Bactra furfurana

Javelin Moth

Bactra verutana

Yellow Sedge Borer

Capsula subflava