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Lyall's rockcress
Scientific Name: Arabis lyallii var. nubigena
Family: Brassicaceae
Category: Dicot
Growth: Forb/herb
Duration: Perennial
Other Names:
Lyall's Rockcress
Lyall's Rockcress, once known as Arabis lyallii, is now primarily classified under the scientific name Boechera lyallii. It is also commonly referred to as Murray's Rockcress.
Taxonomy and Nomenclature
- Scientific Name: Boechera lyallii (formerly Arabis lyallii)
- Common Names: Lyall's Rockcress, Murray's Rockcress
- Family: Brassicaceae (Mustard Family)
- Synonyms: Arabis lyallii S. Watson, Arabis murrayi, Boechera paupercula
Distribution and Habitat
Lyall's Rockcress is a native perennial herb found in central and northern California, as well as Colorado and Idaho. It thrives in rocky soils with low nutrients and moisture, often in drier, upland portions of meadows.
Morphological Characteristics
- Stems are slender and upright.
- Leaves at the base are sessile (without a stalk) or have a short petiole (stalk).
- Basal leaves are oblong, typically 1/3 to 1 inch in length.
- The stem may have a few smaller leaves.
- Flowers are small and start as a rosette.
- Flower color changes from purple to white.