Spontaneous Hybridization between Pinus mugo and Pinus sylvestris at the Lithuanian Seaside: A Morphological Survey

Figure 2

Key morphological traits of P. mugo subs. uncinata. Left: 12 meter tall tree, erect growth (resembling well P. sylvestris, but distinguishing P. mugo subsp. uncinata from P. mugo subsp. rotundata and subsp. mugo) needles fresh green, (a) upper stem dark grey, no reddish brawn peeling off paper flakes. Upper right: shoots dark grey with tip of bark of the stem unit prolonged and bending backwards at the base of the needle sac (b); buds are oval at the top; needles are densely attached. Lower right: cone scales are hooked (c) and cones asymmetric (d), apophysis glossy, umbo bordered.