lyre-leaved rock cress
(Arabidopsis lyrata ssp. lyrata)
Conservation • Wetland • Description • Habitat • Biology • Use • Distribution • Taxonomy
Conservation Status |
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| IUCN Red List | not listed |
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| NatureServe | NNR - Unranked SNR - Unranked |
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| Minnesota | not listed |
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Wetland Indicator Status |
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| Midwest | FACU - Facultative upland |
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| Northcentral & Northeast | FACU - Facultative upland |
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Description |
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Lyre-leaved rock cress is a 4″ to 16″ tall, erect, biennial or perennial forb that rises from a taproot rhizome. The stems are upright or ascending, branched from the base. The lower stem is covered with coarse, stiff hairs. Basal leaves are lyre-shaped, with a large terminal lobe and lateral lobes progressively smaller toward the base. There is a pair of ear-shaped lobes at the base of the leaf. The leaves are ¾″ to 1½″ long and form a rosette. Stem leaves are alternate, linear or narrowly spatula-shaped, widest at the blunt tip, narrowing to the base. The lowest stem leaves may have a few short teeth or lobes, the remaining are unlobed and untoothed. They are attached to the stem without leaf stalks. The inflorescence is a short, loose, branched cluster at the end of the stem and branches. The flowers are ¼″ to ½″ wide, with 4 white to greenish-white petals. They are on ¼″ to ⅔″ long, ascending, flower stalks. The petals are ⅛″ to ⅓″ long, much longer than the sepals. There are 6 stamens. The fruit is a thin, flat pod, ¾″ to 1¾″ long, on a ¼″ to ⅔″ long stalk, spreading outward and pointing upward. |
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Height |
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4″ to 16″ |
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Flower Color |
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White or greenish white |
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Similar Species |
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The rosette of lyre-shaped basal leaves, linear stem leaves, and large flowers are diagnostic for this species. Mouse-ear cress (Arabidopsis thaliana) basal leaves are unlobed. The flowers are much smaller. |
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Habitat |
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Dry. Woods, fields, sand dunes. |
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Biology |
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Flowering |
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April to July |
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Pests and Diseases |
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Defense Mechanisms |
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This and other mustards (family Brassicaceae) produce chemical compounds when cells are damaged that are toxic to most animals, fungi, and bacteria. |
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Use |
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Distribution |
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Sources |
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| 4/30/2022 | ||||
Nativity |
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Native |
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Occurrence |
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Taxonomy |
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| Kingdom | Plantae (green algae and land plants) | ||
| Subkingdom | Viridiplantae (green plants) | ||
| Infrakingdom | Streptophyta (land plants and green algae) | ||
| Superdivision | Embryophyta (land plants) | ||
| Division | Tracheophyta (vascular plants) | ||
| Subdivision | Spermatophytina (seed plants) | ||
| Class | Magnoliopsida (flowering plants) | ||
| Subclass | Rosidae | ||
| Superorder | Rosanae | ||
Order |
Brassicales (mustards, capers, and allies) | ||
Family |
Brassicaceae (mustard) | ||
| Tribe | Camelineae | ||
Genus |
Arabidopsis (rock cress) | ||
Subordinate Taxa |
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Synonyms |
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Arabis lyrata Arabis lyrata var. lyrata |
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Common Names |
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lyrate rockcress lyre-leaf rock-cress lyre-leaved rock-cress lyre-leaved rock cress |
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Glossary
Ascending
Growing upward at an angle or curving upward from the base.
Linear
Long, straight, and narrow, with more or less parallel sides, like a blade of grass.
Visitor Photos |
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Nancy Falkum |
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Bird’s Foot Violet, Hairy Puccoon, and Lyre Leaved Rock Cress |
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Greg Watson |
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MinnesotaSeasons.com Photos |
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Plant |
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Inflorescence |
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Slideshows |
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Visitor Videos |
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Other Videos |
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Visitor Sightings |
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Report a sighting of this plant. |
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| This button not working for you? Simply email us at info@MinnesotaSeasons.com. Be sure to include a location. |
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| Nancy Falkum 5/27/2022 |
Location: Kellogg Weaver Dunes SNA, Weaver Dunes Unit |
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| Greg Watson 4/29/2022 |
Location: Vetsch Park |
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| Nancy Falkum 5/9/2017 |
Location: Kellogg Weaver Dunes SNA, Weaver Dunes Unit Bird’s Foot Violet, Hairy Puccoon, and Lyre Leaved Rock Cress |
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| Laura Dekeyrel 4/7/2016 |
Location: Perrot State Park, Trempealeau WI |
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MinnesotaSeasons.com Sightings |
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