Species Profile for  Wasatch Range Rockcress  (Arabis lasiocarpa) A perennial herb with a branching root-crown elevated upon a woody foot, each branch terminated by a tuft of very narrow, untoothed leaves. Stems several to many, 1.5-3 dm tall. Short, soft, grayish hairs cover the leaves and lower stems. Flowers appear May-June; petals purple, 7-8 mm wide. Fruits are pendulous, straight, 3-5 cm long and 1.5-2 mm wide. The specific epithet, lasiocarpa, refers to refers to the fruits which are usually (but not always) noticeably hairy.

Taxonomic Information

Ecology and Life History

Conservation Status

Distribution

Taxonomic Information	-back to top-
Unique Identifier:	ELEMENT_GLOBAL.2.131730
Element Code	PDBRA06420
Informal Taxonomy	Plants, Vascular -  Flowering Plants ,  Mustard Family
Scientific Taxonomy	Kingdom Phylum Class Order Family Genus Plantae  Anthophyta  Dicotyledoneae  Capparales  Brassicaceae  Arabis
Scientific Name	Arabis lasiocarpa - Rollins
Concept Reference	Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code	B94KAR01HQUS
Name Used in Concept Reference	Arabis lasiocarpa
Taxonomic Comments
Link to Comprehensive Report	http://www.natureserve.org/explorer/servlet/NatureServe?searchName=Arabis+lasiocarpa

Ecology and Life History	-back to top-
Description	A perennial herb with a branching root-crown elevated upon a woody foot, each branch terminated by a tuft of very narrow (linear to linear-oblanceolate), untoothed leaves; stems several to many, 1.5-3 dm tall; pubescence grayish, finely dendritic hairs covering the leaves and lower stems; stem leaves sessile, generally broader than the basal, nonauriculate; flowers appearing May-June; petals purple, 7-8 mm wide; fruiting pedicels gently recurved; fruits pendulous, straight, 3-5 cm long, 1.5-2 mm wide, pubescent or rarely glabrous. The species name lasiocarpa refers to refers to the fruits which are usually (but not always) noticeably hairy.
Size

Conservation Status	-back to top-
Global Status	Global Status Last Reviewed Last Changed Rounded Global Status G3  1998-06-26  1999-01-21  G3 Vulnerable
Reasons	A recently described and incompletely known species, endemic to northcentral Utah. Known from the Bear River Range and (disjunct?) in the central Wasatch Range (Cache, Rich, and Salt Lake counties). Plants found more recently in the Wellsville Mountains and northern Wasatch Range (Box Elder, Cache, and Weber counties) have been tentitively identified as A. lasiocarpa and have begun to fill the gap in the known distribution of the species. Occurrences are sporadic and consist of small, isolated colonies.
National Status(es)	Nation/Subnation Rank United States N3   Utah S3
Other Statuses

Distribution	-back to top-
Endemism
Distribution by Nation/Subnations	National/Subnation   Extirpated Exotic Native United States   false false true   Utah  (UT) false false true
Distribution by U.S. Counties	UT Code Name Year Last Observed Occurrence Count 49003 Box Elder 1996 2 49005 Cache 1996 6 49011 Davis 1958 1 49029 Morgan 1958 1 49033 Rich 1981 4 49035 Salt Lake 1999 6 49049 Utah 1974 1 49057 Weber 1996 3
Distribution by U.S. Watersheds	HUC Code Name Year Last Observed Occurrence Count 16010101 Upper Bear 1981 2 16010201 Bear Lake 1979 1 16010203 Little Bear-Logan 1996 5 16020102 Lower Weber 1996 5 16020204 Jordan 1999 6

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Citation:  NatureServe. 2006.  NatureServe’s Central Databases. Arlington, VA. U.S.A.

Acknowledgement Statement:    This information is provided by NatureServe (www.natureserve.org) and its network of Natural Heritage member programs, a leading source of information about rare and endangered species, and threatened ecosystems.