Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Arabis drummondii Gray
- Family: Mustard (Cruciferae)
- Flowering: June-August
- Field Marks: This rockcress has strictly erect, slender pods 2-5 inches long, toothed but not lobed basal leaves, and smooth or only slightly hairy stems.
- Habitat: Rocky woods, moist slopes.
- Habit: Biennial herb with a thickened rootstock.
- Stems: Upright, branched or unbranched, up to 2 feet tall, smooth or only slightly hairy, sometimes glaucous.
- Leaves: Both cauline and basal, linear-lanceolate to oblanceolate, pointed at the tip, tapering to the base, up to 3 inches long, smooth or sparsely hairy, often toothed, the basal leaves with stalks, the cauline leaves sessile and sometimes cla
- Flowers: Several in a terminal cluster, each on a smooth stalk up to 1 inch long.
- Sepals: 4, green, free from each other, up to 1/4 inch long.
- Petals: 4, white, rarely pinkish, free from each other, 1/4-1/2 inch long.
- Stamens: 6.
- Pistils: Ovary superior.
- Fruits: Pods numerous, crowded, strictly erect, 2-5 inches long; seeds oblongoid, winged at each end.
- Notes: The seeds are eaten by small mammals.
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