Pinus pumila (Pall.) Regel

Scientific Naming and Common Identity

Pinus pumila (Pall.) Regel, commonly known as Siberian dwarf pine, is a coniferous evergreen shrub.

Typical and Maximum Height

It typically reaches 1 to 3 meters (3 to 10 feet) in height, and may exceptionally grow up to 5 meters (16 feet) tall; individual branches can extend further along the ground.

Natural Hybridization

In the mountains of northern Japan, it sometimes hybridizes with the related Japanese white pine (Pinus parviflora).

Hybrid Characteristics

The resulting hybrid, Pinus × hakkodensis, is larger than P. pumila, occasionally reaching 8 to 10 meters (26 to 33 feet) in height.

Leaf Traits

Its leaves are needle-like, produced in bundles of five, and measure 4 to 6 centimeters long.

Cone and Seed Traits

Its cones are 2.5 to 4.5 centimeters long, and contain large nut-like seeds called pine nuts.

Natural Geographic Range

The natural range of Pinus pumila includes the Far East, Eastern Siberia, northeastern Mongolia, northeastern China, northern Japan, and Korea.

Alpine Mountain Habitat

It grows along mountain chains above the tree line, where it forms dense, continuous thickets.

Coastal Habitat

It also grows on headlands above the Okhotsk and Bering Seas, the Tatarsk coast, and the Pacific coast of the Kuril Islands.

Growth Rate

P. pumila grows very slowly.

Lifespan

It can live up to 300 years, and in some cases may reach 1,000 years of age.

Seed Dispersal

In ecological terms, the seeds of P. pumila are harvested and dispersed by the spotted nutcracker (Nucifraga caryocatactes).

Fire Spread Trait

The needles, branches, and cones of P. pumila are highly flammable, so it readily spreads crown fires, especially where it grows continuously across local landscapes.

Fire Adaptation

It produces serotinous cones that release seeds after fire, which helps the species recover after severe fires caused by lightning strikes and other sources.

Ornamental Cultivation

This species is cultivated as an ornamental shrub for planting in parks and gardens.

Cultivar Recognition

The cultivar P. pumila 'Glauca' has received the Royal Horticultural Society's Award of Garden Merit.