Chamaecyparis obtusa (Siebold & Zucc.) Endl. var. formosana (Hayata) Hayata
Tree: evergreen; erect; 40 m maximum
height; monoecious. Trunk: 3.6 m maximum diameter. Bark: brown,
or red; smooth – scaly, or peeling off in strands. Crown: dense; columnar
to narrowly or widely conical (pyramidal). Branches: ascending, or
horizontal. Ultimate branchlets: 1.5–2.5 mm
wide; 2–25 mm long; arranged in one plane; flattened in cross-section; with
white or glaucous marking.
Leaves: only adult leaves on adult plants;
scaly. Scale leaves: 0.5–5 mm long; 0.7–2.5 mm wide; arranged
oppositely; bright green; apically spreading, or closely appressed;
two types of leaves (differentiation in lateral and facial leaves = dimorphic);
tip blunt, or acute; with conspicuous, inconspicuous, or without glands;
without white resin; with, or without resin glands on leading shoots. Lateral
leaves: 1–5 mm long; facial and lateral leaves conspicuously unequal in
length; visibly adjoined (facial leaves are not overlapping). Facial leaves:
0.5–3 mm long.
Male cones: 0.5–5 mm long; 0.5–3 mm
wide; solitary; 10–12 male cone scales; 5–6 male cone scale whorls; ovoid, or
oblong; yellow, bright brown, red, or orange. Male cone scales: arranged
oppositely; 1–4 pollen sacs per male cone scale.
Female cones: 7.5–11 mm long; 8–11 mm
wide; 8–10 cone scales; globose; cone-like (open after maturity); woody; not
disintegrating after maturity; reddish, or dark; young cones greenish or green
with bluish coating. Female cone scales: arranged oppositely; inserted
on different levels in mature cones; without several small additional cone
scales on the female cone; tip blunt; with dorsal depression, or with small
dorsal umbo; umbo more or less in the centre. Columella: 1–4 mm long; simple
(round, angled at the apex, or a flat, woody plate).
Seeds: 1.5–4 mm long; 2.5–5 mm wide; 24–48
seeds per cone; dark brown – black; 2–7 seeds per female cone scale; flattened.
Seed wings: 0.2–2 mm wide; 2 (almost) equal wings.
Supplement: maturity in the first
year; 2 cotyledones; 22 chromosomes (2n). Cultivation:
cultivated in