Pinus rigida (pitch pine) description - The Gymnosperm Database

Conservation Status

Pinus rigida

Mill. (1768)

Common names

Pitch pine; pin rigide [French]; リギダマツ [Japanese].

Taxonomic notes

Type not designated. Syn. Pinus taeda var. rigida (Mill.) Aiton. Some infraspecific taxa have been described, but none are currently recognized. This species belongs to subgenus Pinus, subsection Australes, clade Taeda (Cruz-Nicolás et al. 2024), which is comprised of species all found in the SE US, but occupying different habitats. Phylogenetic relationships between the 6 species in the clade remain unclear. Nuclear DNA allies southern specimens of P. rigida to P. taeda and northern ones to P. serotina (Cruz-Nicolás et al. 2024). The transcriptome places it sister to P. serotina (Jin et al. 2021), while plastid markers place it sister to P. pungens (Hernández-León et al. 2013).

P. rigida is known to hybridize naturally with P. echinata (Kral 1993). The two species introgress over a wide area in eastern Kentucky (and perhaps elsewhere where sympatric), producing trees with very small, P. rigida-shaped seed cones, and larger seed cones that are intermediate between the normal shape for each species (R. Clark email 2009.12.15).

Description

Monoecious evergreen trees to 31 m tall and 90 cm dbh, usually with a single straight or crooked trunk, commonly bearing adventitious sprouts between some of the bark plates, poorly self-pruning; crown rounded or irregular, made up of arching, spreading to ascending branches. Bark red-brown, deeply and irregularly furrowed with long, irregularly rectangular, flat, scaly ridges; resin pockets absent. Twigs 5-10 mm thick, yellowish-green soon turning reddish brown, rough with pulvini after leaves have fallen. Buds ovoid to ovoid-cylindric, red-brown, ca. 10-15 mm long, resinous; scale margins fringed, apex cuspidate. Leaves 3(-5) per fascicle, spreading to ascending, persisting 2-3 years, 5-10(-15) cm × 1-1.5(-2) mm, straight, twisted, deep to pale yellow-green, all surfaces with fine stomatal lines, margins serrulate, apex abruptly subulate-acuminate; sheath 9-12 mm, persistent. Pollen cones cylindric, ca. 20 mm, yellow. Seed cones solitary or in whorls of 2-5, maturing in 2 years, shedding seeds soon thereafter or variously serotinous and long-persistent, often clustered, symmetric, conic to ovoid before opening, broad-ovoid with flat or slightly convex base when open, 3-9 cm long, creamy brown to light red-brown, sessile to short-stalked, base truncate, scales firm, with dark red-brown border on adaxial surface distally; apophyses slightly raised, rhombic, with strong transverse keels; umbo central, low-triangular, with slender, downcurved prickle. Seeds broadly obliquely obovoid-deltoid; body 4-5(-6) mm, dark brown, mottled darker, or near black; wing 15-20 mm. 2n=24 (Kral 1993, Farjon 2010). See García Esteban et al. (2004) for a detailed characterization of the wood anatomy.

Also see the Key to the Pines of the Southeastern United States.

The only other pine in the SE US to bear adventitious sprouts is P. serotina, which has longer, pliable needles.

Distribution and Ecology

Canada: Ontario and Québec; S through USA: Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Delaware, Pennsylvania, Maryland, Ohio, Virginia, West Virginia, Kentucky, Tennessee, North Carolina, South Carolina and Georgia. Upland or lowland sites on sterile, nutrient-poor, commonly thin, sandy or boggy soils; at 0-1400 m elevation (Kral 1993). See also Thompson et al. (1999). Hardy to Zone 4 (cold hardiness limit between -34.3°C and -28.9°C) (Bannister and Neuner 2001).

Distribution data from USGS (1999).

This species has a large range within which it shows various adaptations to fire and other disturbances. Those adaptations include sprouting from epicormic buds protected by thick bark, sprouting from basal buds protected by crooks and/or soil, and seedling establishment from seed in nonserotinous cones or opened serotinous cones (Gucker 2007). In the flat, continuous environment of the New Jersey pine barrens and other sandy soils in the Atlantic coastal plain, large areas may be dominated by P. rigida. On such sites the pine is adapted to frequent, stand-destroying fires. These trees commonly resprout after fires; they also bear serotinous cones and regenerate profusely in the aftermath of fire (Gucker 2007). The effectiveness of resprouting as a fire adaptation is extraordinary among pines, most of which will not resprout at all; but as Boerner (1981) noted "wildfire killed the aboveground portions of oaks and removed needle and branch tissue from pines, but almost all individuals of trees and shrubs resprouted to form a dense canopy ca. 1 m high after one growing season." The pines also have the advantage of serotiny: the cones may experience external temperatures in excess of 400°C and yet the seeds within maintain a temperature of less than 100°C and remain viable (Fraver 1992). In the rugged topography of the central and southern Appalachian Mountains, the species is seldom serotinous (Ledig and Fryer 1972); in these areas adaptations such as resprouting may be more important in driving the species' response to fire. In the Appalachians pitch pine commonly occurs with Table Mountain pine (P. pungens) and/or Virginia pine (P. virginiana); these species are all adapted to frequent, variable-severity fire and show adaptations to both tolerate low-severity fire and to regenerate readily in the aftermath of more severe burns that kill a large fraction of the mature trees (Williams 1998, Aldrich et al. 2014, Saladgya 2017). Fire history studies in these mountains have shown that historically (and likely during the prehistoric era as well; Gucker [2007], Parshall et al. [2003]), P. rigida dominance in the forest was maintained through episodic fires set by humans. The more severe and extensive fires were associated with years of drought. Those fires occurred with a recurrence interval of about 8 years from the 1600s to the early 20th century, when widespread fire suppression became the norm in forest management in the U.S. (Aldrich et al. 2014, Marschall et al. 2016, Welch et al. 2000). Since then, the species has become more restricted to naturally dry sites such as ridgetops and rock outcrops (Williams 1998, Saladgya 2017). Efforts at restoring the species through prescribed burning have found limited success; evidently relatively high severity burns that eliminate most hardwood competition are needed to perpetuate the pine-dominated forest (Welch et al. 2000).

Mast crops of cones are produced every 4 to 9 years and the seeds, which average 60 per cone, are heavily exploited by squirrels, eastern towhees, and other wildlife (Gucker 2007). Thoreau (1860) relates "almost every pitch pine one that falls at all is cut off by a squirrel, and they begin to pluck them long before they are ripe... I have counted in one heap, within a diameter of four feet, the cores of 239 pitch pine cones which had been cut off and stripped by the red squirrel the previous winter."

Pathogens afflicting pitch pine include stem rusts caused by the fungus Cronartium spp., several needle rusts and blights, twig cankers, and root and trunk rots such as Heterobasidion annosum and Phellinus pini. Many insect pests have also been recorded, the most important being tip moths (Rhyacionia spp.), pitch pine looper (Lambdina athasaria), several sawflies (Neodiprion spp.), southern pine beetle (Dendroctonus frontalis), pine webworm (Tetralopha robustella), and pine needle miners (Exoteleia pinifoliella) (Little and Garrett 1990). Currently, due to a warming climate and increased drought stress, the southern pine beetle is the pest of primary concern for pitch pine (Clarke and Nowak 2009, Lesk et al. 2017).

Pitch pine has an extremely large area of occurrence and area of occupancy, with many discrete populations; accordingly it is of "least concern" for conservation.

Remarkable Specimens

The largest on record was 129 cm dbh, 29.7 m tall, crown spread 14.0 m (Payne 2025). This is probably the same tree as the 1996 champion in Newbury, New Hampshire, with nearly identical measurements; it has put on a little height since then (American Forests 1996). The tallest known one is 44.6 m tall, 71 cm dbh, and grows near the West Fork Chattooga River in Georgia (Riddle 2016). Another very tall tree in Great Smoky Mountains National Park is 41.27 m tall (Rucker 2003). The oldest known tree was 398 years old, crossdated, when it was sampled in 2013 in Minnewaska Lake State Park, New York. It was found and sampled by C. McIntire, K. Pendergrass, and the NADEF 2013 Advanced DendroClimatology Group (Pederson 2025). Another very old tree was found growing at Mohonk Lake, New York by Ed Cook in 1973. He collected specimen 420411, presumably from a live tree, and it had 351 rings. This is a crossdated age (NCDC 2006).

Ethnobotany

Aboriginal uses of P. rigida are recorded for the Cherokee and Iroquois, although similar uses were likely made of it by other tribes within its range. The Cherokee used pitch pine as a source of lumber, to make canoes, and to make carvings. The Iroquois consumed the pitch as a treatment for rheumatism and as a laxative. They applied the pitch to injuries in treatment of burns, boils, and joint pain. The foliage was burned to get rid of fleas. The Shinnecock made a poultice (which part of the plant is not specified) to treat boils and abscesses (NAEB 2026).

Historically, the coarse-grained resin-rich wood was valued for its relatively high decay resistance, which was useful for shipbuilding, mine props, fencing, railroad ties, and poles. Occasionally resin was distilled from the wood for naval stores (Little and Garrett 1990). Locally, as in New Jersey's pine barrens, pitch pine was most important as a source of firewood—in this case, to fire iron smelters and glassworks, either directly or after processing as charcoal. These uses drove a demand for immense quantities of wood; the iron smelters alone required harvest of about 16,000 ha of timber per year, besides which wildfires would commonly ravage thousands of hectares more (Sinton 1977). (This region was also home to another economically important 19th century conifer, Chamaecyparis thyoides.) Another obsolete use of pitch pine was to make torches, and also for production of lampblack for coloring ink and black paint (Cullity 2019).

The species is now of less importance for timber. Pitch pine is typically treated as a "minor southern pine" because despite its wide distribution, it is most common in North Carolina, Virginia, and New Jersey; although it is locally abundant elsewhere, e.g. on Cape Cod (Massachusetts) (Sternitzke and Nelson 1970). Due to its tendency toward twisted trunks and large, heavy knots, it does not qualify as a structural timber but finds low-grade uses such as pallets and crating, or is used in processed wood applications such as oriented strand board or pulpwood (USFS Forest Products Laboratory 2010). Realistically, pitch pine is now likely more important for its ecosystem services than for its commodity value. Those services include soil stabilization and revegetation in areas of very poor soils, provision of a seed crop for exploitation by birds and small mammals, habitat for a wide variety of rare and sensitive species, hydrologic and watershed values, and recreation values (Pinelands Alliance).

Observations

Near the southern end of the species' range, some exceptionally large and tall trees occur along the Abrams Creek Trail in Great Smokies National Park (Will Blozan pers. comm. 2024.03.08). It is the dominant pine in New Jersey's pine barrens, eloquently described in John McPhee's 1967 classic The Pine Barrens. It is also the dominant conifer on Cape Cod in Massachusetts, where it inspired such notables as Thoreau and Emerson (Cullity 2019).

Remarks

The epithet rigida means "stiff", and refers to the needles.

"I see in the open field east of Trillium Wood a few pitch pines springing up, from seeds blown from the wood a dozen or fifteen rods off. Here is one just noticeable on the sod—though by most it would be mistaken for a single sprig of moss—which came from the seed this year. It is, as it were, a little green star with many rays, half an inch in diameter, lifted an inch and a half above the ground on a slender stem. What a feeble beginning for so long-lived a tree! By the next fall it will be a star of greater magnitude, and in a few years, if not disturbed, these seedlings will alter the face of nature here. How significant, how ominous, the presence of these green moss-like stars is to the grass, heralding its doom! Thus from pasture this portion of the earth’s surface becomes forest." —Henry David Thoreau (Journal 1860.11.26). Thoreau, in his journal for November 1, 1860, records a pitch pine stump 20 inches in diameter where he counted 167 rings. He goes on to spend quite a bit of that month's journal in commentary on pitch pine age, growth, yield, and ecology.

"Nineteen‐twentieths of their substance do trees draw from the air. Plant the pitch‐pine in a sandbank, where is no food, and it thrives, and presently makes a grove, and covers the sand with a soil by shedding its leaves." —Ralph Waldo Emerson, "Fate".

Citations

Aldrich, S. R., C. W. Lafon, H. D. Grissino‐Mayer, and G. G. DeWeese. 2014. Fire history and its relations with land use and climate over three centuries in the central Appalachian Mountains, USA. Journal of Biogeography 41:2093–2104.

American Forests 1996. The 1996-1997 National Register of Big Trees. Washington, DC: American Forests.

Boerner, R. E. J. 1981. Forest structure dynamics following wildfire and prescribed burning in the New Jersey pine barrens. The American Midland Naturalist 105(2):321-333.

Clarke, S. R., and J. T. Nowak. 2009. Southern pine beetle. Forest Insect and Disease Leaflet, USDA Forest Service, Washington, DC. 8 pp.

Cruz-Nicolás, Jorge, Juan Pablo Jaramillo-Correa, and David S. Gernandt. 2024. Stochastic processes and changes in evolutionary rate are associated with diversification in a lineage of tropical hard pines (Pinus). Molecular Phylogenetics and Evolution 192:108011, https://doi.org/10.1016/j.ympev.2024.108011.

Cullity, John N. 2019. Pitch pine history and importance. https://www.provincetownconservationtrust.org/articles/2019/11/24/pitch-pine-history-and-importance, accessed 2026.09.26.

Fraver, S. 1992. The insulating value of serotinous cones in protecting pitch pine (Pinus rigida) seeds from high temperatures. Journal of the Pennsylvania Academy of Science 65:112–116.

Gucker, Corey. 2007. Pinus rigida, pitch pine. https://research.fs.usda.gov/feis/species-reviews/pinrig, accessed 2026.09.26.

Hernández-León, S., D. S. Gernandt, J. A. Pérez de la Rosa, and L. Jardón-Barbolla. 2013. Phylogenetic relationships and species delimitation in Pinus section Trifoliae inferred from plastid DNA. PLoS ONE 8:e70501.

Jin, W.-T., D. S. Gernandt, C. Wehenkel, X.-M. Xia, X.-X. Wei, and X.-Q. Wang. 2021. Phylogenomic and ecological analyses reveal the spatiotemporal evolution of global pines. Proceedings of the National Academy of Sciences 118:e2022302118.

Ledig, F. T., and J. H. Fryer. 1972. A pocket of variability in Pinus rigida. Evolution 26:259–266.

Lesk, Corey, Ethan Coffel, Anthony W. D’Amato, Kevin Dodds, and Radley Horton. 2017. Threats to North American forests from southern pine beetle with warming winters. Nature Climate Change 7(10):713-717.

Little, S. and P. W. Garrett. 1990. Pinus rigida Mill. pitch pine. Pp. 456-462 in R. M. Burns and B. H. Honkala (eds.), Silvics of North America, V. 1, Conifers. U.S. Forest Service Agriculture Handbook 654.

Marschall, Joseph M., Michael C. Stambaugh, Benjamin C. Jones, Richard P. Guyette, Patrick H. Brose, and Daniel C. Dey. 2016. Fire regimes of remnant pitch pine communities in the ridge and valley region of central Pennsylvania, USA. Forests 7(10):224. https://doi.org/10.3390/f7100224.

Miller, P. 1768. The Gardener's Dictionary, ed. 8. London. Available: botanicus.org/title/b12066618, accessed 2011.05.20.

[NAEB] Native American Ethnobotany Database. 2026. Response to query "Pinus rigida". http://naeb.brit.org/uses/search/?string=pinus+rigida, accessed 2026.09.26.

[NCDC 2006] Data accessed at the National Climatic Data Center World Data Center for Paleoclimatology Tree-Ring Data Search page. http://hurricane.ncdc.noaa.gov/pls/paleo/fm_createpages.treering, accessed 2006.09.08, now defunct.

Parshall, T., D. R. Foster, E. Faison, D. MacDonald, and B. C. S. Hansen. 2003. Long-term history of vegetation and fire in pitch pine-oak forests on Cape Cod, Massachusetts. Ecology 84(3):736-748.

Payne, J. (ed.). 2025. The 2024 Register of National Champion Trees. National Champion Tree Program, https://nationalchampiontree.org/.

Pederson, Neil. 2025. Eastern OLDLIST. https://dendro.cnre.vt.edu/olds/detail.cfm?genus=Pinus&species=rigida, accessed 2025.03.01.

Riddle, Jess. 2016. West Fork Chattooga River Pines. http://www.ents-bbs.org/viewtopic.php?f=73&t=7533, accessed 2017.11.04.

Saladgya, Thomas. 2017. Forest disturbance history from ‘legacy’ pitch pine (Pinus rigida) at the New River Gorge, West Virginia. Natural Areas Journal 18:81–90.

Sargent, Charles Sprague. 1947. The Silva of North America, Vol.XI, Coniferae. New York: Peter Smith. Plate DLXXIX. Available: Biodiversity Heritage Library, accessed 2021.12.19.

Sinton, J. W. 1977. The phoenix of the pines. Environmental Review 2(4):17-24.

Sternitzke, H. S., and T. C. Nelson. 1970. The southern pines of the United States. Economic Botany 24:142–150.

Thoreau, H. D. 1860. The succession of forest trees. Address to the Middlesex Agricultural Society in Concord, September 1860. Available: walden.org, accessed 2026.09.26.

USFS Forest Products Laboratory. 2010. Wood Handbook. General Technical Report FPL-GTR-190. Madison, Wisconsin: USDA Forest Service.

Welch, N. T., T. A. Waldrop, and E. R. Buckner. 2000. Response of southern Appalachian table mountain pine (Pinus pungens) and pitch pine (P. rigida) stands to prescribed burning. Forest Ecology and Management 136:185–197.

Williams, C. E. 1998. History and status of Table Mountain pine–pitch pine forests of the southern Appalachian Mountains (USA). Natural Areas Journal 18:81–90.