Pinus parviflora (ゴヨウマツ) description

Pinus parviflora

Siebold et Zuccarini 1842

Common names

ゴヨウマツ hime-ko-matsu, goyo-matsu (var. pentaphylla: Kita-goyo) [Japanese]; Japanese white pine.

Taxonomic notes

This is a white pine, one of four species native to Japan. There are two varieties, parviflora and pentaphylla, and one natural hybrid, P. × hakkodensis.

Synonymy for Pinus parviflora var. parviflora (Farjon 1998):

Pinus cembra L. var. japonica E.J. Nelson 1866;
Strobus parviflora (Sieb. et Zucc.) Moldenke 1952;
Pinus cembra Thunb. 1784 non L. 1753;
Pinus heterophylla C. Presl 1851 non K. Koch 1849;
Pinus himekomatsu Miyabe et Kudô 1920.

Synonymy for Pinus parviflora var. pentaphylla (Mayr) A. Henry 1910 (Farjon 1998):

P. pentaphylla Mayr 1890.

P. × hakkodensis Makino 1931 is the natural hybrid between P. parviflora var. pentaphylla and P. pumila. Synonym: P. pentaphylla Mayr var. hakkodensis (Makino) Kusaka 1954.

"There are many cultivars of var. pentaphylla, such as Kamuro-goyo, Orizuru-goyo, Fuiri-goyo, Janome-goyo, etc. A form having the bark smooth was named var. pentaphylla f. laevis (Hara) Sugim. (Japanese name: Todohada-goyo. New Keys Wood. Pl. Jap.: 47, 1972. = var. laevis Hara in Bot. Mag. Tokyo 48: 794, t. 3, 1934)" (Iwatsuki et al. 1995).

For discussion of systematics relative to other species in subsection Strobus, see Phylogeny of East Asian white pines.

Description

The type variety is a monoecious, evergreen tree up to 25 m tall and 100 cm dbh. The trunk is massive, straight (sometimes split into two or more stems), supporting an irregular crown that flattens in old trees. The young bark is smooth and gray, aging to a dull gray, rough, longitudinally fissured, peeling off into scales. Branchlets are gray-green to yellow-brown, puberulent (glabrous). The scale leaves are alternate on long shoots and at base of short shoots, red-brown, lanceolate, acute, 5-15 mm long, 2 mm wide, deciduous. Leaves 5 per fascicle (fascicle sheaths deciduous in second year), 3-6 cm long, 0.8 mm across, apex acute, twisted, triangular in transverse section, dark green on dorsal face, the two ventral faces pale green from stomatal bands; resin canals two on lower side, marginal. They are densely whorled, giving branches a tufted appearance. Pollen cones in clusters of 20-30, crowded on lower part of new shoots, cylindric, red-brown, 5-6 mm long, 3 mm wide, with numerous stamens. Seed cones small for a tree of subg. Strobus, 1-10, crowded on upper part of new shoots, ovoid or elliptic-ovoid, maturing 6-8 cm long, 3-3.5 cm wide; seed scales resinous, loosely overlapping at maturity, widely obovate, gradually narrowing to base, 2-2.5 cm long, 2-2.3 cm wide, apex rounded, with a blackish spiny boss; bract scales small and inconspicuous. The cones persist for many years. Seeds obovoid, blackish, 8-10 mm long, 6-7 mm wide; wings short, 3-7 mm long, 8 mm wide, as long as or shorter than seed. Chromosome number n = 12. Flowers in May, with cones ripening in October of following year (Farjon 1984, Iwatsuki et al. 1995).

Var. pentaphylla has seed wings 10-12 mm long, ca. 8 mm wide, longer or as long as seed. The seed scales remain more or less appressed until after maturity (Iwatsuki et al. 1995).

P. × hakkodensis has characters intermediate between the parent species. As such it is a shrub to 3 m tall with ellipsoid-ovoid cones ca. 6 × 3.5 cm that open at maturity. Seed scales have rounded apophyses with a spiny umbo; seeds have short wings (Farjon 2010).

Distribution and Ecology

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). P. × hakkodensis occurs in central and north Honshu, and in Hokkaido at elevations of 1000 to 1700 m, in scrub vegetation (Farjon 2010).

Along with another white pine, P. koraiensis, it is the characteristic pine in subalpine areas of Japan; these two pines probably covered much of the Honshu coastal area during the Pleistocene (Kremenetski et al. 1998). Hardy to Zone 5 (cold hardiness limit between -28.8°C and -23.3°C) (Bannister and Neuner 2001).

Each of the infraspecific taxa is assessed as "least concern" for conservation purposes (Farjon 2010).

Remarkable Specimens

I have found no data on trees in habitat, but Fincham (2022, p. 277) shows a photograph of a bonsai specimen started in 1625, which would make it at least 395 years old.

Ethnobotany

It is a common ornamental (cultivars named in Taxonomic Notes, above), and a popular tree for bonsai. Hardy in Zones 4-7. It was introduced to England in 1861 by John Gould Veitch and has become quite popular there (Dallimore et al. (1967)). See Gilman and Watson (1994) for horticultural data for the United States.

Observations

It is reasonably common in temperate-zone gardens and arboreta. I am not aware of any particularly good places to see it in habitat.

Remarks

The epithet parviflora means "small-flowered" and indeed this species has unusually small cones for a white pine. The epithet pentaphylla means "5-leaved," hardly a distinction among the white pines. The epithet hakkodensis means "from Hokkaido," where the nothospecies was described.

The seeds of this pine are known to be dispersed by the Eurasian Nutcracker Nucifraga caryocatactes (Hayashida 1989). See Lanner (1996) for a thorough discussion of the complex relationship between nutcrackers and pines.

Citations

Farjon, Aljos. 1998. World Checklist and Bibliography of Conifers. Richmond, U.K.: Royal Botanical Gardens at Kew.

Farjon, Aljos. 2010. A Handbook of the World's Conifers. Leiden, Netherlands: Brill Academic Publishers.

Fincham, Robert. 2022. Artsy/Fartsy Conifers. Puyallup, WA: Coenosium.

Hayashida, M. 1989. Seed dispersal and regeneration patterns of Pinus parviflora var. pentaphylla on Mt. Apoi in Hokkaido. Research Bulletins of the College Experimental Forests (Hokkaido University) 46: 177-190.

Iwatsuki K., Yamazaki T., Boufford, D.E., and Ohba H. (eds.). 1995. Flora of Japan, Volume 1. Pteridophyta and Gymnospermae. Tokyo, Japan: Kodansha. Pp. xv and 263-288.

Kremenetski, C.V., Kam-biu Liu and G. MacDonald. 1998. Late-Quaternary dynamics of pines: northern Asia. Pp. 95-106 in Richardson (1998).

Makino, Tomitaro. 1931. Flora of Japan, 2nd ed. (p. 148).

Siebold, P. F. v. and J. G. Zuccarini. 1842–1870. Flora Japonica sive, Plantae Quas in Imperio Japonico Collegit, Descripsit, ex Parte in Ipsis Locis Pingendas Curavit. Sectio Prima Continens Plantas Ornatui vel Usui Inservientes. Digessit J. G. Zuccarini. Volumen secundum. 89 + 1 pp., 150 tab., Lugduni Batavorum [Leiden] (p. 27, t. 115).