provided by eFloras
Pinus glabra is more shade tolerant than most yellow pines. Although the trees grow large, the wood is not much valued. The species is similar in tree form to P . strobus . It resembles P . echinata in shoot and leaf but has less prickly cones and deeper green leaves.
provided by Fire Effects Information System Plants
More info for the terms: frequency
Spruce pine is a medium-sized, native, evergreen conifer. It usually
grows to 90 to 100 feet (27.4-30.5 m) tall and 24 to 36 inches (61-91
cm) in d.b.h. The national champion tree is 125 feet (38.1 m) tall.
The needles are borne in bundles of two and are 1.6 to 4 inches (4-10
cm) long [3
]. The bark is relatively thin (0.25 to 0.375 inch
]. The bark is smooth on young trees, later developing
close ridges with flat plates on the lower trunk of older trees. Upper
branches and trunks maintain the smoother bark [3
]. The branches are
]. Spruce pine develops a moderately deep taproot, with
numerous moderately deep lateral roots. It is obligately mycorrhizal;
seedlings that fail to develop mycorrhizae usually do not survive [2
Longevity is approximately 113 years; the relatively short life span is
probably a result of the high frequency of good seed crops [12
provided by eFloras
Trees to 30m; trunk to 1m diam., straight; crown conic to rounded. Bark gray, fissured and cross-checked into elongate, irregular, scaly plates, resin pockets absent, on upper sections of trunk ± smooth, gray, looking slick. Branches whorled, spreading to ascending; twigs slender, purple-red to red-brown, occasionally glaucous, aging gray, smooth. Buds ovoid to ovoid-cylindric, red-brown, ca. 0.5--1cm, slightly resinous; scale margins finely fringed. Leaves 2 per fascicle, spreading to ascending, persisting 2--3 years, 4--8(--10)cm ´ 0.7--1.2mm, straight, slightly twisted, dark green, all surfaces with fine stomatal lines, margins finely serrulate, apex sharply conic; sheath 0.5--1cm, base persistent. Pollen cones lance-cylindric, 10--15mm, purple-brown. Seed cones maturing in 2 years, shedding seeds soon thereafter, semipersistent, spreading to recurved, nearly symmetric, lance-ovoid before opening, ovoid-cylindric when open, 3.5--7cm, red-brown, aging gray, nearly sessile or on stalks to 1cm, scales lacking contrasting border on adaxial surfaces (as in P . echinata ); apophyses but slightly thickened and raised; umbo central, depressed, unarmed or with small, curved, weak, deciduous, short-incurved prickle. Seeds deltoid-obovoid; body ca. 6mm, brown, mottled darker; wing to ca. 12mm. 2 n =24.
provided by USDA PLANTS text
Tree, Evergreen, Monoecious, Habit erect, Trees without or rarely having knees, Primary plant stem smooth, Tree with bark smooth, Tree with bark rough or scaly, Young shoots 3-dimensional, Buds resinous, Leaves needle-like, Leaves alternate, Needle-like leaf margins finely serrulate (use magnification or slide your finger along the leaf), Leaf apex acute, Leaves < 5 cm long, Leaves > 5 cm long, Leaves < 10 cm long, Leaves not blue-green, Needle-like leaves triangular, Needle-like leaves twisted, Needle-like leaf habit erect, Needle-like leaves per fascicle mostly 2, Needle-like leaf sheath persistent, Twigs glabrous, Twigs viscid, Twigs not viscid, Twigs without peg-like projections or large fascicles after needles fall, Berry-like cones orange, Woody seed cones < 5 cm long, Woody seed cones > 5 cm long, Seed cones bearing a scarlike umbo, Umbo with missing or very weak prickle, Bracts of seed cone included, Seeds brown, Seeds winged, Seeds unequally winged, Seed wings prominent, Seed wings equal to or broader than body.