Peritoma serrulata

(Rocky Mountain Beeplant)

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Peritoma serrulata, Prewitt Reservoir, Washington Co, 08284

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Peritoma serrulata, along CR 45, South of Doylesville, Saguache Co. 3135

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Peritoma serrulata, Lathrop State Park, Huerfano Co. 7380

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Peritoma serrulata, Great Sand Dunes NP, Alamosa Co. 7833

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Peritoma serrulata, Great Sand Dunes NP, Alamosa Co. 7842

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Peritoma serrulata, along CR 45, South of Doylesville, Saguache Co. 3143

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Peritoma serrulata, Pawnee Buttes, Weld Co. 7303

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Peritoma serrulata, along CR 45, South of Doylesville, Saguache Co. 3141

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Peritoma serrulata, Prewitt Reservoir, Washington Co, 08311

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Peritoma serrulata, along CR 45, South of Doylesville, Saguache Co. 3153

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Peritoma serrulata, Prewitt Reservoir, Washington Co, 08305

Scientific Name Peritoma serrulata (Cleome serrulata) USDA PLANTS Symbol CLSE
Common Name Rocky Mountain Beeplant ITIS Taxonomic Serial No. 823032
Family Cleomaceae (Cleome formerly Capparacaea) SEINet
Reference
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Description Life zones and habitat: Plains to montane (3500 to 9000 ft.); sandy soils in open fields, roadsides, and other disturbed places.
Plant: Erect annual 20 to 32 inches tall, single stem branched near top.
Leaves: Compound leaves each with three slender lanceolate leaflets, 1 to 2-3/8 inches long.
Inflorescence: Clusters of many pink to dark pink or lavender flowers in a terminal raceme each with 4 petals and 6 long stamens.
Bloom Period: June to September.
Fruit: Elongated, hairless, pods 3/4 to 2-3/4 inches long, slightly constricted between the seeds (torulose), hanging on long pedicels and containing many black or gray-mottled, ovoid seeds, 3-4 mm long.
References: "Flora of Colorado" by Jennifer Ackerfield, American Southwest and SEINet.
BONAP Distribution Map

Map Color Key
Colorado Status:
Native

© Tom Lebsack 2026

Banner photo: Castilleja rhexifolia and a brewing storm over the San Juan Mountains

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