Whitebark Pine (Pinus albicaulis) ESA status: threatened (January 2023) Whitebark pine can grow to 12–18 m tall (40–60 ft) and, rarely, up to 1.5 m (5 ft) in diameter. They are shorter, or even shrub-like at higher, windier elevations. The bark is thin, scaly, and grayish. Their needles are 4–10 cm... FWS Focus Species Kingdom Plantae Taxonomic Rank Species