(Field Pennycress)
Thlaspi arvense, Lake Dillon, Summit Co. 5829
Thlaspi arvense, Lake Dillon, Summit Co. 5742
Thlaspi arvense, Lake Dillon, Summit Co. 5734
Thlaspi arvense, Breckenridge, Summit Co. 6365
Thlaspi arvense, Breckenridge, Summit Co. 6368
| Scientific Name | Thlaspi arvense | USDA PLANTS Symbol | THAR5 |
| Common Name | Field Pennycress | ITIS Taxonomic Serial No. | 23422 |
| Family | Brassicaceae (Mustard) | SEINet Reference |
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| Description |
Life zones and habitat: Plains to montane (3700 to 10500 ft.); open areas, meadows, disturbed areas, roadsides.
Plant: Erect, single or branched annual 7 to 30 inches tall; bright green, hairless with an unpleasant odor when bruised. Leaves: Oblanceolate or ovate basal leaves, 3/4 to 2-3/8 inches long, sinuate-dentate to lyrate on short petioles, withering early; alternate middle and upper leaves, ovate to lanceolate or auriculate, sometimes coarsely toothed, 5/8 to 1-5/8 inches long, sessile or clasping. Inflorescence: Very small white flowers initially in a small, flat cluster at the top of the stem, four sepals, four white petals, six stamens. Bloom Period: May to August. Fruit: Large numbers of flat, obovate or suborbicular seed pods 3/8 to 1-5/8 inches across, on slender, upward curving stalks; deeply notched at tip, bright green to yellowish. References: "Flora of Colorado" by Jennifer Ackerfield and SEINet. |
BONAP Distribution Map Map Color Key | Colorado Status: Introduced |
© Tom Lebsack 2024
Banner photo: Castilleja rhexifolia and a brewing storm over the San Juan Mountains