| Oregon Flora Image Project | |
| Equisetum arvense L. | common horsetail - native Equisetaceae |
Click on an image for a larger version. All images © Gerald D. Carr unless otherwise noted.
In this species, ephemeral, unbranched, non-green shoots produce terminal spore-bearing cones in early spring; the highly branched, sterile green shoots persist through the growing season. Rarely, as seen in the last two images, the green shoots may produce rudimentary terminal cones.
| Bog at head of Quartzville Cr., S side of NFD Rd. 11, 9.7 mi. W of jct. with Hwy 22, 4080 ft. elev., N44.57447, W122.12259, Linn Co., OR, 6/7/2010 | Bog at head of Quartzville Cr., S side of NFD Rd. 11, 9.7 mi. W of jct. with Hwy 22, 4080 ft. elev., N44.57447, W122.12259, Linn Co., OR, 6/7/2010 | Bog at head of Quartzville Cr., S side of NFD Rd. 11, 9.7 mi. W of jct. with Hwy 22, 4080 ft. elev., N44.57447, W122.12259, Linn Co., OR, 6/7/2010 |
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| Bog at head of Quartzville Cr., S side of NFD Rd. 11, 9.7 mi. W of jct. with Hwy 22, 4080 ft. elev., N44.57447, W122.12259, Linn Co., OR, 6/7/2010 | Bog at head of Quartzville Cr., S side of NFD Rd. 11, 9.7 mi. W of jct. with Hwy 22, 4080 ft. elev., N44.57447, W122.12259, Linn Co., OR, 6/7/2010 | Bog at head of Quartzville Cr., S side of NFD Rd. 11, 9.7 mi. W of jct. with Hwy 22, 4080 ft. elev., N44.57447, W122.12259, Linn Co., OR, 6/7/2010 | Along Sherman Creek, off Hwy 20, 13 mi. W of Kettle Falls, 2440 ft. elev., Ferry Co., WASHINGTON, 5/17/2010, (© Robert L. Carr) | Along Sherman Creek, off Hwy 20, near the jct of the N & S Forks, W of Kettle Falls, 2460 ft. elev., Ferry Co., WASHINGTON, 8/27/2010 (© Robert L. Carr) |
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| NFD Rd. 25, ca. 18 mi. S of Randle, Skamania Co., WASHINGTON, 8/5/1996 | NFD Rd. 25, ca. 18 mi. S of Randle, Skamania Co., WASHINGTON, 8/5/1996 | NFD Rd. 25, ca. 18 mi. S of Randle, Skamania Co., WASHINGTON, 8/5/1996 | NFD Rd. 25, ca. 18 mi. S of Randle, Skamania Co., WASHINGTON, 8/5/1996 |
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