Equisetum laevigatumA. Braun [family EQUISETACEAE ] (stored under name); Verified by Eaton, A. A., Equisetum laevigatumA. Braun [family EQUISETACEAE ] Verified by Moran, R. C., 1981
Related name
Equisetum funstonii
Equisetum laevigatum
Equisetum kansanum
Equisetum hyemale
Equisetum fontinale
Common name
Smooth scouring rush, Flora of North America Vol. 2
Flora
Entry for Equisetum laevigatum A. Braun [family EQUISETACEAE]
Equisetum funstoniiA.A. Eaton [family EQUISETACEAE], E. kansanum J.H. Schaffner
Treatment Author(s)
Richard L. Hauke
Information
Aerial stems lasting less than a year, occasionally overwintering in the southwestern United States, usually unbranched, 20--150 cm; lines of stomates single; ridges 10--32. Sheaths green, elongate, 7--15 × 3--9 mm; teeth 10--32, articulate and usually shed early, leaving dark rim on sheath. Cone apex rounded to apiculate with blunt tip; spores green, spheric. 2 n =216.
Schaffner named this species Equisetum kansanum because he applied the name E . laevigatum to what we now know is the hybrid E . × ferrissii . The coarser-stemmed, occasionally persistent forms in the southwestern United States have been called Equisetum funstonii .
