Rockcress Plant Information
Rockcress grows in the following 50 states:Alaska, Arizona, Colorado, Connecticut, District Of Columbia, Georgia, Idaho, Illinois, Indiana, Kansas, Kentucky, Maryland, Minnesota, Mississippi, Montana, Nebraska, New Hampshire, New Mexico, North Carolina, Oklahoma, Pennsylvania, South Carolina, South Dakota, Utah, Vermont, Wisconsin, Wyoming, Oregon, West Virginia, Alabama, Arkansas, California, Delaware, Florida, Iowa, Louisiana, Maine, Massachusetts, Michigan, Missouri, Nevada, New Jersey, New York, North Dakota, Ohio, Rhode Island, Tennessee, Texas, Virginia, Washington
Arabis /rbs/, or rockcress, is a genus of flowering plants, within the family Brassicaceae, subfamily Brassicoideae.
The species are herbaceous, annual or perennial plants, growing to 10-80cm tall, usually densely hairy, with simple entire to lobed leaves 1-6cm long, and small white four-petalled flowers. The fruit is a long, slender capsule containing 10-20 or more seeds.
Though traditionally recognized as a large genus with many Old World and New World members, more recent evaluations of the relationships among these species using genetic data suggest there are two major groups within the old genus Arabis. These two groups are not each other's closest relatives, so have been split into two separate genera. Most of the Old World members remain in the genus Arabis, whereas most of the New World members have been moved into the genus Boechera, with only a few remaining in Arabis.
Some species, notably A. alpina, are cultivated as ornamental plants in gardens. Many others are regarded as weeds.
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