Furrows branched (Ephedra nevadensis type). Ridges 11 to 15, furrows branched Ephedra nevadensis S. Wats., Ephedraceae CN: Jointfir or Mormon Tea SIZE: Polar axis about 35 µm equatorial diameter 22 µm RANGE: Oregon and California to Utah and Arizona. NOTES: Ridges vary from 11 to 15 in number (average 13). The colpi in the centers of the furrows are undulate. The ridge crests are thin (0.5 µm) and either straight or undulate.

Ephedra nevadensis S. Wats. Coll. Arizona; Ephedraceae.