Pinus serotina
Pinus washoensis
marsh pine, pocosin pine, pond pine
Washoe pine
red-brown, irregularly furrowed and cross-checked into rectangular, flat, scaly plates.
yellow-brown to reddish, fissured, plates scaly.
spreading to ascending;
twigs stout, orange- to yellow-orange, frequently glaucous, aging darker.
spreading-ascending;
twigs stout, orangish, aging gray, rough.
ovoid to narrowly ovoid, red-brown, 1–1.5(–2)cm, resinous.
ovoid, red-brown, 1.5–2cm, not resinous;
scale margins fringed.
3 per fascicle (to 5 in adventitious or disturbed growth), spreading to ascending, persisting 2–3 years, (12–)15–20(–21)cm × 1.3–1.5(–2)mm, slightly twisted, tufted at twig tips, straight, yellow-green, all surfaces with fine stomatal lines, margins serrulate, apex acuminate;
sheath 1–2cm, base persistent.
(2–)3 per fascicle, spreading-ascending, persisting (2–)4–6(–7) years, 10–15cm × ca. 1.5mm, slightly twisted, gray-green, all surfaces with stomatal lines, margins finely serrulate, apex acuminate;
sheath 1–2cm, base persistent.
cylindric, to 30mm, yellow-brown.
cylindric, 10–20mm, red-purple.
cones maturing in 2 years, in some populations beginning to shed seeds then but more often variably serotinous, long-persistent, often whorled, symmetric, ovoid to lanceoloid before opening, broadly ovoid to nearly globose when open, 5–8cm, pale red-brown to creamy brown, sessile or on stalks to 1cm, scales with dark red-brown border on adaxial surface distally;
apophyses slightly thickened, low, rhombic, low cross-keeled;
umbo central, low-conic, with short, weak prickle, sometimes unarmed.
cones maturing in 2 years, shedding seeds soon thereafter, not persistent, spreading, slightly asymmetric, ovoid-conic before opening, broadly ovoid when open, 7–10cm, tan or pale red-brown, sessile, abaxial surface of scales darker and sharply contrasting in color with adaxial surface;
apophyses slightly raised, low pyramidal;
umbo central, narrowly pyramidal, tapering into short, reflexed, fine prickle.
=24.
=24.
Pinus serotina
Pinus washoensis
Pinus serotina is fire successional and sprouts adventitiously after crown fires. It is part of a distinct forest type including Taxodium distichum (Linnaeus) Richard, Nyssa biflora Walter, Magnolia virginiana Linnaeus, Persea sp., and Ilex sp. Of good form when protected from fire, P. serotina then much resembles P. taeda, with which it hybridizes naturally. It is of increasing importance as pulpwood.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Pinus washoensis often occurs in large stands and resembles P. jeffreyi. The number and posture of seed-cone scales fall within the ranges given for P. jeffreyi. The abaxial surface of these scales has a significantly darker pigmentation, however; such a color contrast is not apparent in P. jeffreyi. Forest geneticists have developed hybrids between P. washoensis and related yellow pines, but no natural hybrids have been observed. Some workers regard P. washoensis as closely related to—or even conspecific with--- P. ponderosa.
Of conservation concern.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
MD Biodiversity
WildflowerSearch
iNaturalist
USDA Plants Database
CA
OR
Flora NW
PNW Herbaria
