Flora of North America species comparison

grayish brown, in age becoming thick and deeply furrowed (furrows and ridges about same width) and reddish brown (especially reddish when plates flake off).

gray, thin, smooth, with age thickening (to 18cm) and breaking into deep longitudinal furrows, often revealing yellowish inner periderm, appearing "corky." Branches diverging from trunk at right angles, the lower often spreading and drooping in age;

twigs mostly opposite, glabrous or with yellowish pubescence.

diverging from trunk at right angles, stiff;

twigs reddish brown, finely pubescent for several years.

hidden by leaves, tan, ovoid, small, not resinous, apex rounded;

basal scales short, broad, equilaterally triangular, pubescent centrally, not resinous, margins entire to crenate, apex sharp-pointed.

exposed, either yellowish and nearly conic (when large) or brownish and nearly globose (when small), resinous, apex rounded to pointed;

basal scales equilaterally triangular, glabrous, not resinous, margins entire, apex sharp-pointed.

1–3(–3.5)cm × 1.5–2mm, 1-ranked, flexible, proximal portion often appressed to twig for 2–3mm (best seen on abaxial surface of twig), distal portion divergent;

cross section flat, with prominent raised midrib abaxially, with or without groove adaxially, or cross section 4-sided on fertile branches;

odor pungent, faintly turpentinelike;

abaxial surface with 2–4 glaucous bands, each band with (4–)6–7 stomatal rows;

adaxial surface bluish green, with 0–2 glaucous bands, each band with 0–7 stomatal rows at midleaf;

apex rounded to notched;

leaves on fertile branches 4-sided with 4 bands of stomates below;

resin canals small, near margins and abaxial epidermal layer.

1.5–6cm × 2–3mm, mostly 2-ranked, flexible, proximal portion ±straight;

cross section flat, sometimes slightly grooved adaxially;

odor pungent, frequently camphorlike;

abaxial surface glaucous, with 4–7 stomatal rows on each side of midrib;

adaxial surface grayish green, glaucous, with (7–)12(–18) stomatal rows at midleaf, these usually fewer toward leaf apex;

apex usually rounded, sometimes acute or notched;

resin canals small, near margins and abaxial epidermal layer.

at pollination ± purple, ± red, or reddish brown.

at pollination ± red, purple, or ± green.

cones oblong-cylindric, 10–15 × 5–6.5cm, green, red, or purple, overlaid with green bracts, at maturity brown (bracts light-colored and scales dark), sessile, apex rounded;

scales ca. 2.5 × 3cm, pubescent;

bracts exserted and reflexed over scales.

cones cylindric, 7–12 × 3–4.5cm, olive-green, sessile, apex round;

scales ca. 2.5–3 × 3–3.5cm, pubescent;

bracts included.

=24.

=24.