 Photo ©
Carl Farmer |
Occasional where the parents grow together. Stem diameter c 3-7 mm Skye ID: Cone-bearing stems are green and branched, and have prominent ridges, easily felt to the touch, like Field Horsetail, not a smooth surface like Water Horsetail Sheaths have as many teeth as there are stem ridges. Branches mostly 4 or 5 angled, their lowest internode being not greatly different in length from the stem sheath at that point. Other features: Very variable, as both parents are. Central hollow of stem about 65-75% of stem width. Stem sheaths have long pointed teeth, black in the upper half, or at least at the tip. |