Pseudotsuga macrocarpa Mayr

Bigcone douglas-fir (en)

Species

Gymnosperms > Pinales > Pinaceae > Pseudotsuga

Characteristics

Trees to 25 m tall; trunk to 1.3 m d.b.h.; bark reddish brown, aging dark blackish gray, scaly, longitudinally fissured; branchlets pendulous, reddish brown or pale brown, aging gray-brown, slender, flexible, slightly pubescent; winter buds reddish brown, ovoid-conical or fusiform-conical, acute. Leaves 2.5-4 cm × ca. 2 mm, stomatal bands 2, abaxial, grayish white, base strongly twisted, apex acute. Seed cones greenish yellow when immature, ripening to dull brown, ovoid-cylindric, 9-13(-18) × 4-6 cm. Seed scales at middle of cones broadly cuneate-flabellate, thick, transversely convex, 2-2.5 × 3-3.5 cm, often resinous, puberulent when young, soon glabrous, faintly striate abaxially. Bracts exserted, not reflexed, lingulate, cusp longer than lateral lobes. Seeds brown, ovoid-conical, 1-1.2 cm × ca. 6 mm; wing pale brown, obovate, 1-1.4 cm.
More
Trees to 44m; trunk to 2.  diam.; crown broadly conic. Twigs slender, glabrous or pubescent. Leaves (20--)25--45 × 1--1.5mm, bluish green, apex mucronulate. Pollen cones pale yellow. Seed cones 9--20 × 4--7cm. Seeds 9--12mm. 2 n =24.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality monoecy
Pollination anemogamy
Spread -
Mature width (meter) 1.5
Mature height (meter) 20.0 - 22.9
Root system -
Rooting depth (meter) 0.8
Root diameter (meter) -
Flower color -
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Slopes, cliffs, and canyons, in chaparral and mixed coniferous forests; at elevations from 200-2,400 metres. Rocky and well drained soils on the seaward slopes of coastal mountain;s at elevations from 275- 2,450 metres.
Light 6-8
Soil humidity 2-5
Soil texture -
Soil acidity 3-6
Soil nutriment -
Hardiness (USDA) -

Usage

Uses material wood
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings. Seeds needs stratification.
Mode seedlings
Germination duration (days) 30 - 180
Germination temperacture (C°) 23
Germination luminosity light
Germination treatment stratification
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Pseudotsuga macrocarpa unspecified picture

Distribution

Pseudotsuga macrocarpa world distribution map, present in China and United States of America

Conservation status

Pseudotsuga macrocarpa threat status: Near Threatened

Identifiers

LSID urn:lsid:ipni.org:names:677139-1
WFO ID wfo-0000396497
COL ID 78HCJ
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Tsuga macrocarpa Pseudotsuga macrocarpa Abies macrocarpa Pseudotsuga californica Pseudotsuga menziesii subsp. macrocarpa Pseudotsuga douglasii var. macrocarpa Abies douglasii var. macrocarpa Abies douglasii var. macrocarpa