Aerial stems monomorphic, green, unbranched or branched, 35--115 cm; hollow center large, to 9/10 stem diam.; vallecular canals absent. Sheaths squarish in face view, ca. 4--10 × 4--10 mm; teeth black, occasionally with narrow white border, 12--24, narrow, 2--3 mm. Branches when present only from midstem nodes, spreading, hollow, ridges 4--6, valleys rounded; 1st internode of each branch shorter than subtending stem sheath; sheath teeth narrow. 2 n =216.
Phenology
Cones maturing in summer
Altitude range
0--1500 m
Distribution
St. Pierre and MiquelonEurasia s to n ItalyChinaKoreaJapan.USA Alaska including the Aleutian IslandsUSA Conn.USA Del.USA D.C.USA IdahoUSA Ill.USA Ind.USA IowaUSA MaineUSA Md.USA Mass.USA Mich.USA Minn.USA Mont.USA Nebr.USA N.H.USA N.J.USA N.Y.USA N.Dak.USA OhioUSA Oreg.USA Pa.USA R.I.USA S.Dak.USA Vt.USA Va.USA Wash.USA W.Va.USA Wis.USA Wyo.Canada Alta.Canada B.C.Canada Man.Canada N.B.Canada Nfld.Canada N.W.T.Canada N.S.Canada Ont.Canada P.E.I.Canada Que.Canada Sask.Canada Yukon
