Japanese White Pine - Pinus parviflora
Commonly called "five-needle pine", This lovely tree has an oustanding irregular silhouette, making it a great specimen for nearly any landscape. It is also a popular subject for bonsai.
 
 

Japanese White Pine - Pinus parviflora
Japanese White Pine - Pinus parviflora
This Morton Arboretum specimen is resident on Pine Hill

Japanese White Pine creates a striking landscape element wherever it is used. Often seen as a dense, conical form when young, Japanese White Pine develops into a 25 to 50-foot-tall, graceful, irregularlyshaped tree, with an equal or greater spread, and a broad, flattened canopy. The 1 to 2.5-inch-long needles are stiff and twisted, forming blue/green tufts of foliage at branch tips, and creating an overall fine texture to the tree’s silhouette. The brownish-red cones are one to four inches long and persist on the tree for six to seven years.

Scientific name: Pinus parviflora
Pronunciation: PIE-nus par-vih-FLOR-uh
Common name(s): Japanese White Pine
Family: Pinaceae
USDA hardiness zones: 4B through 7A (Fig. 2)
Origin: not native to North America
Uses: Bonsai; screen; specimen; no proven urban tolerance

DESCRIPTION
Height: 25 to 50 feet / Spread: 25 to 50 feet
Crown uniformity: irregular outline or silhouette
Crown shape: spreading; pyramidal
Crown density: dense
Growth rate: slow

Foliage
Leaf arrangement: alternate; spiral / Leaf type: simple / Leaf margin: entire / Leaf shape: needle-like (filiform)
Leaf venation: parallel / Leaf type and persistence: evergreen; fragrant; / needle leaf evergreen
Leaf blade length: 2 to 4 inches; less than 2 inches / Leaf color: blue or blue-green; green [1]

Japanese White Pine Cones
Immature cones

Flower color: yellow / Flower characteristics: inconspicuous and not showy; spring flowering
Fruit shape: oval / Fruit length: 3 to 6 inches; 1 to 3 inches / color: brown; red / does not attract wildlife.

Bark is thin and easily damaged from mechanical impact; droop as the tree grows, and will require pruning for vehicular or pedestrian clearance beneath the canopy; not particularly showy; should be grown with a single leader; no thorns. Susceptible to breakage either at the crotch due to poor collar formation, or the wood itself is weak and tends to break.

When looking for a small, picturesque specimen Pine for a landscape, search no more. One of the best specimens in any landscape, Japanese White Pine is a pleasure to behold with attractive foliage in all seasons. Set it off in the landscape with a low ground cover beneath or locate it in the lawn, but keep the grass cleared away from the thin-barked trunk. Japanese White Pine should be grown in full sun on well-drained soil with adequate moisture. The trees are salt-tolerant, and tolerate moderate drought and moist, clay soil.

Cultivars include: ‘Brevifolia’, upright, narrow tree, sparsely branched, blue/green foliage in tight bundles; and ‘Glauca’, available in nurseries, greenish foliage with a touch of silver, wide-spreading tree, 45 feet high or more. [1] 

 

Range
Korea (Ullung Island) and Japan. Type variety in central W Honshu (southward from Fukushima Prefecture, mainly on Pacific Ocean side), Shikoku and Kyushu, growing at 200-1800 m elevation. Var. pentaphylla in S Hokkaido and N to central Honshu (in C Honshu mainly on Japan Sea side), growing on sunny rocky slopes at from 60-800 m elevation in Hokkaido, and 300-2500 m in Honshu (Iwatsuki et al. 1995). Along with another white pine, P. koraiensis, it is the characteristic pine is subalpine areas of Japan; these two pines probably covered much of the Honshu coastal area during the Pleistocene. [3]

Japanese White Pine
Sorry for this wholely unnacceptable specimen. I'll look for a better one, I promise.

References:
1. Edward F. Gilman and Dennis G. Watson, U.S. National Forest Service Fact Sheet ST-470, Japanese White Pine - Pinus parviflora
2. USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN)
3. Gymnosperm Database, www.conifers.org, Pinus parviflora Siebold et Zuccarini 1842

 

              
 
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