Juncus triformis

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Juncus triformis
Scientific classification e
Kingdom: Plantae
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Juncaceae
Genus: Juncus
Species: J. triformis
Binomial name
Juncus triformis

Juncus triformis is an uncommon species of rush known by the common names Yosemite dwarf rush and long-styled dwarf rush.

It is endemic to California, where it grows in wet granite rock habitat covered in thin soil layers, such as vernal pools and seeps. [1] It is known from the Sierra Nevada, Central Valley, southern Cascade Range, and locations in the eastern Transverse Ranges and the Peninsular Ranges in Southern California. [2]


Juncus triformis is a small annual herb forming dense clumps of hair-thin red stems up to about 16 centimeters high.

The inflorescence is made up of one to eight tiny flowers atop each stem. The flowers have a few greenish to bright red segments no more than 4 or 5 millimeters long.


  1. ^ Calflora database: Juncus triformis . 2.12.2013
  2. ^ Jepson . 2.12.2013

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