Boechera grahamii

(Graham’s Rockcress)

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Boechera grahamii, Golden Horseshoe, Breckenridge, Summit Co. 9396

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Boechera grahamii, Golden Horseshoe, Breckenridge, Summit Co. 9320

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Boechera grahamii, Golden Horseshoe, Breckenridge, Summit Co. 9353

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Boechera grahamii, Golden Horseshoe, Breckenridge, Summit Co. 9341

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Seed pods, Boechera grahamii, Golden Horseshoe, Breckenridge, Summit Co. 9332

Scientific Name Boechera grahamii (Arabis drummondii var. brachycarpa) USDA PLANTS Symbol N/A
Common Name Graham's Rockcress ITIS Taxonomic Serial No. 822987
Family Brassicaceae (Mustard) SEINet
Reference
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Description Life zones and habitat: Plains to subalpine (5000 to 10500 ft); sandy soils in open forests, dry slopes, and grasslands.
Plant: Erect, perennial with usually 1 stem arising from center of basal rosette, 6 to 48 inches tall, smooth or pubescent near the bottom and smooth above.
Leaves: Basal leaves oblanceolate up to 1-1/2 inches long and up to 3/4-inch wide, with coarse hairy surfaces, sometimes with sparsely-toothed edges; alternate stem leaves are smooth, lanceolate, up to 1-1/2 inches long and up to 1/4-inch wide clasping with small auricles at their bases, and erect with lower leaves often concealing stem.
Inflorescence: Clusters in terminal racemes and on the ends of branches arising from leaf axils; racemes elongate with time; flowers about 1/4 to 1/3 inch across with 4 spreading, usually white (rarely lavender), petals and yellow stamens on pedicels less than 1/4 to 7/8-inch long.
Bloom Period: May to August.
Fruit: Narrow pod up to 3 inches long, somewhat ascending, descending, or bowed, ripening to a purplish color.
Reference: "Flora of Colorado" by Jennifer Ackerfield, Flora of North America and Minnesota Wildflowers.
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