Oregon Flora Image Project
Equisetum ×ferrissii Clute ferriss' horsetail - native
Equisetaceae

Click on an image for a larger version. All images © Gerald D. Carr unless otherwise noted.

Hybrid between Equisetum hyemale and E. laevigatum exhibiting white, misshapen spores (see last image below).  Spores of fertile species are normally green and well developed.

Smith Loop Rd., 0.1 mi. SW of jct. with Dorr Rd., S of Corvallis, 246 ft. elev., N44.45550, W123.23609, Benton Co., OR, 6/12/2017 S side of Bruce Rd., just W of jct. with Hwy 99W, S of Corvallis, 267 ft. elev., N44.39101, W123.28608, Benton Co., OR, 6/12/2017 Smith Loop Rd., 0.1 mi. SW of jct. with Dorr Rd., S of Corvallis, 246 ft. elev., N44.45550, W123.23609, Benton Co., OR, 6/12/2017 Smith Loop Rd., 0.1 mi. SW of jct. with Dorr Rd., S of Corvallis, 246 ft. elev., N44.45550, W123.23609, Benton Co., OR, 6/12/2017
Smith Loop Rd., 0.1 mi. SW of jct. with Dorr Rd., S of Corvallis, 246 ft. elev., N44.45550, W123.23609, Benton Co., OR, 6/12/2017 S side of Bruce Rd., just W of jct. with Hwy 99W, S of Corvallis, 267 ft. elev., N44.39101, W123.28608, Benton Co., OR, 6/12/2017 Smith Loop Rd., 0.1 mi. SW of jct. with Dorr Rd., S of Corvallis, 246 ft. elev., N44.45550, W123.23609, Benton Co., OR, 6/12/2017 S side of Bruce Rd., just W of jct. with Hwy 99W, S of Corvallis, 267 ft. elev., N44.39101, W123.28608, Benton Co., OR, 6/12/2017 S side of Bruce Rd., just W of jct. with Hwy 99W, S of Corvallis, 267 ft. elev., N44.39101, W123.28608, Benton Co., OR, 6/12/2017
  S side of Bruce Rd., just W of jct. with Hwy 99W, S of Corvallis, 267 ft. elev., N44.39101, W123.28608, Benton Co., OR, 6/12/2017 S side of Bruce Rd., just W of jct. with Hwy 99W, S of Corvallis, 267 ft. elev., N44.39101, W123.28608, Benton Co., OR, 6/12/2017  
   

 


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