Juniperus horizontalis Moench
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Branches closely prostrate, often much elongate, with numerous erect branches 1–3 dm; lvs mostly scale-like and appressed, varying from ovate and 1–2 mm to oblong and to 4 mm; cones on short, recurved peduncles, blue, 5–8 mm thick; seeds mostly 3–5, not pitted. Rocky or sandy places; nearly transcontinental in Can., from Nf., Lab., and Que. to Yukon and n. B.C. and disjunct in Alas., more scattered s. to Me. (esp. along the coast), N.H., N.Y., Mich. (notably along the shores of the Great Lakes), Wis., Minn., and Wyo. Hybridizes with J. virginiana.