''Boechera falcatoria'' (formerly ''Arabis falcatoria'') is a rare species of flowering plant in the family Brassicaceae known by the common name Grouse Creek rockcress. It is endemic to Utah in the United States, where it is known only from

Box Elder County Box Elder County is a county at the northwestern corner of Utah, United States. As of 2018, the estimated population is 54,950. Its county seat and largest city is Brigham City. The county was named for the box elder trees that abound in the co ...

. It has been reported from neighboring Nevada, but these reports are likely based on misidentifications.''Arabis falcatoria''.
The Nature Conservancy.

Description

This perennial

herb In general use, herbs are a widely distributed and widespread group of plants, excluding vegetables and other plants consumed for macronutrients, with savory or aromatic properties that are used for flavoring and garnishing food, for medicinal ...

produces several stems up to 20 to 30 centimeters tall from a

caudex A caudex (plural: caudices) of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.pages 456 and 695 In the strict sense of the term, meaning a stem, "caudex" is m ...

. The lower part of the stem and the basal leaves are hairy. The inflorescence is a

raceme A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the s ...

of 6 to 15 flowers with white or lavender petals. The fruit is a curving, sickle-shaped silique up to 6.5 centimeters in length.''Boechera falcatoria''.
Flora of North America. This plant grows on open rocky outcrops in sand and gravel. This species is known from a few collections and little else is known about its abundance.

References

falcatoria Flora of Utah Flora of Northern America {{Brassicales-stub