Arabidopsis lyrata (Lyre-Leaved Rock Cress) - photos and description

 

 


Basal leaves in above photo


Stem leaf in above photo

 

General: Biennial or perennial plant with an upright growth habit, and a basal rosette of leaves. The Flora of Alberta lists the plant as glabrous or with simple or forked hairs. The plants we observed were glabrous.

Flowers: Flowers are racemose, white in colour, we measured flowers to 6 mm diameter.

Fruit: Pods are flat in profile, ascending, the pod highlighted in photo above was 37 mm long and 1 mm wide.

Leaves: Basal leaves lyrate, basal leaf measured at 2.5 cm long by 6 mm wide. Stem leaves alternate, linear, taper slightly at their base. Stem leaf highlighted in photo above was 22 mm long and 2 mm wide.

Height: Height listed in Budd's Flora to 30 cm, we measured plants to 30 cm tall.

Habitat: Open sandy woods.

Abundance: Listed as common in Checklist of Vascular Plants of Saskatchewan.

Origin: Native.

Synonym: Listed in many of the reference books we use as Arabis lyrata.

When and where photographed: The above photos were taken June 15th, sandy jack pine woods south of Hudson Bay, SK, about 400 km north of our home in Regina, SK.