Boechera stricta

(Drummond's Rockcress)

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Boechera stricta, Hoosier Ridge, Summit Co. 9396

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Boechera stricta, Lower Cataract Lake, Summit Co. 9711

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Boechera stricta, Breckenridge, Summit Co. 8859

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Boechera stricta, Lower Cataract Lake, Summit Co. 1477

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Boechera stricta, Hoosier Ridge, Summit Co. 9394

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Boechera stricta, Lower Cataract Lake, Summit Co. 1469

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Boechera stricta with Puccinia monoica fungus, Mayflower Gulch 8956

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Boechera stricta with Puccinia monoica fungus, Mayflower Gulch 8965

Scientific Name Boechera stricta (Arabis drummondii) USDA PLANTS Symbol ARDR
Common Name Drummond's Rockcress ITIS Taxonomic Serial No. 822989
Family Brassicaceae (Mustard) SEINet
Reference
Click Here
Description Life zones and habitat: Montane to alpine (7000 to 13000 ft). Gravelly or rocky slopes, meadows, openings.
Plant: Erect perennial 1 to 3 feet tall (6 to 18 inches at altitude), usually 1 but up to 4 slender stem.
Leaves: Mostly basal leaves from a rosette, 3/4 to 3 inches long, narrow, oblanceolate, pointed tip, fleshy.
Inflorescence: Several small, erect blossoms in a raceme, each with 4 white to pale lavender petals.
Bloom Period: May to August.
Fruit: Capsules are smooth, very narrow, linear, 1-1/2 to 4 inches long and about 1/8-wide or less; erect, usually appressed to the center stalk of the inflorescence.
Reference: "Guide to Colorado Wildflowers" by G.K. Guennel, "Flora of Colorado" by Jennifer Ackerfield and SEINet.
Note: In early spring, some plants become infected with Puccinia monoica, a rust fungus that stops the rock cress from flowering and forces it to form the brilliant yellow pseudoflowers containing the reproductive structures of the rust fungus. See last group of photos above. For more information about the fungus, click here.
BONAP Distribution Map

Map Color Key
Colorado Status:
Native

© Tom Lebsack 2022

Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County