Pine Cone Mini Bonsai Tree (Pinus thunbergii)Pinus thunbergia can reach the height of 40 m, but rarely achieves this size outside its natural range. The needles are in fascicles of two with a white sheath at the base, female cones are scaled, with small points on the tips of the scales, taking two years to mature. Bark is gray on young trees and small branches, changing to black and plated on larger branches and the trunk; becoming quite thick on older trunks. Male flowers of Pinus thunbergia