Juniperus horizontalis (creeping juniper or creeping cedar) is a low-growing shrubby juniper native to northern North America, throughout most of Canada from Yukon east to Newfoundland, and in the United States in Alaska, and locally from Montana east to Maine, reaching its furthest south in Wyoming and northern Illinois.
It lives up to both its scientific and common names, reaching only 10–30 cm tall but often spreading several metres wide. The shoots are slender, 0.7–1.2 millimetres (0.028–0.047 in) diameter. The leaves are arranged in opposite decussate pairs, or occasionally in whorls of three; the adult leaves are scale-like, 1–2 mm long (to 8 mm on lead shoots) and 1–1.5 millimetres (0.039–0.059 in) broad. The juvenile leaves (on young seedlings only) are needle-like, 5–10 mm long. The cones are berry-like, globose to bilobed, 5–7 millimetres (0.20–0.28 in) in diameter, dark blue with a pale blue-white waxy bloom, and contain two seeds (rarely one or three).