Pinus clausa
sand pine, scrub pine, spruce pine
gray to gray-brown, furrowed, with narrow, flat, irregular ridges, resin pockets absent, on upper sections of the trunk reddish to red-brown, platy becoming smooth distally.
spreading to ascending, poorly self-pruning;
twigs slender, violet- to red-brown, rarely glaucous, aging gray, smooth.
cylindric, purple-brown, to 1cm;
scale margins white-fringed.
2 per fascicle, spreading-ascending, persisting 2–3 years, (3–)6–9(–10)cm × ca. 1mm, straight, slightly twisted, dark green, all surfaces with fine, inconspicuous stomatal lines, margins finely serrulate, apex short-conic;
sheath 0.3–0.5(–0.7)cm, base persistent.
ellipsoid, ca. 10mm, brownish yellow.
cones maturing in 2 years, shedding seeds soon thereafter or often long-serotinous, long-persistent, solitary or whorled, spreading, symmetric (rarely slightly asymmetric, reflexed), lanceoloid before opening, ovoid to broadly ovoid when open, 3–8cm, red-brown, sessile or on stalks to 1cm, scales with dark red-brown, purple, or purple-gray border distally on adaxial surface;
apophyses thickened, shallowly and angulately raised, transversely rhombic, cross-keeled;
umbo central, low-pyramidal, tapering to sharp tip or weak, often deciduous prickle.
=24.
Pinus clausa
Although Pinus clausa is too profusely branched to be important for saw timber, it is managed to produce a high volume of pulpwood in northern peninsular Florida.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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