Difference between revisions of "Sequoia sempervirens"

(D. Don) Endlicher

Syn. Conif. 198. 1847.

Common names: Redwood
Basionym: Taxodium sempervirens D. Don
Treatment appears in FNA Volume 2.
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--><span class="statement" id="st-d0_s0" data-properties="tree some measurement"><b>Trees </b>to ca. 110 m;</span> <span class="statement" id="st-d0_s1" data-properties="trunk diameter">trunk to 9 m diam.;</span> <span class="statement" id="st-d0_s2" data-properties="crown shape;crown architecture;crown shape;crown shape">crown conic and monopodial when young, narrowed conic in age.</span> <span class="statement" id="st-d0_s3" data-properties="bark coloration;bark thickness;bark texture;bark shape;bark architecture"><b>Bark </b>reddish-brown, to ca. 35 cm thick, fibrous, ridged and furrowed.</span> <span class="statement" id="st-d0_s4" data-properties="branch orientation;branch shape;branch orientation"><b>Branches </b>downward sweeping to slightly ascending.</span> <span class="statement" id="st-d0_s5" data-properties="leaf some measurement;portion fusion;portion some measurement;branchlet orientation;shoot reproduction;shoot arrangement;shoot fixation or orientation;shoot shape;shoot shape;shoot shape;rank count;abaxial stomatal count;abaxial stomatal prominence;abaxial stomatal coloration;abaxial band count;abaxial band prominence;abaxial band coloration"><b>Leaves </b>1–30 mm, generally with stomates on both surfaces, the free portion to 30 mm, those on leaders, ascending branchlets, and fertile shoots divergent to strongly appressed, short-lanceolate to deltate, those on horizontally spreading to drooping branchlets mostly linear to linear-lanceolate, divergent and in 2 ranks, with 2 prominent, white abaxial stomatal bands.</span> <span class="statement" id="st-d0_s6" data-properties="pollen cone shape;pollen cone shape;pollen cone shape;pollen cone some measurement;pollen cone arrangement"><b>Pollen </b>cones nearly globose to ovoid, 2–5 mm, borne singly on short terminal or axillary stalks.</span> <span class="statement" id="st-d0_s7" data-properties="seed-cone distance"><b>Seed-</b>cones 1.3–3.5 cm.</span> <span class="statement" id="st-d0_s8" data-properties=""><b>Seeds </b>flattened, 3–6 mm, leathery.</span> <span class="statement" id="st-d0_s9" data-properties="seed shape;seed some measurement;seed texture;2n chromosome count">2n = 66.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>to ca. 110 m; trunk to 9 m diam.; crown conic and monopodial when young, narrowed conic in age. <b>Bark</b> reddish brown, to ca. 35 cm thick, fibrous, ridged and furrowed. <b>Branches</b> downward sweeping to slightly ascending. <b>Leaves</b> 1–30 mm, generally with stomates on both surfaces, the free portion to 30 mm, those on leaders, ascending branchlets, and fertile shoots divergent to strongly appressed, short-lanceolate to deltate, those on horizontally spreading to drooping branchlets mostly linear to linear-lanceolate, divergent and in 2 ranks, with 2 prominent, white abaxial stomatal bands. <b>Pollen</b> cones nearly globose to ovoid, 2–5 mm, borne singly on short terminal or axillary stalks. <b>Seed</b> cones 1.3–3.5 cm. <b>Seeds</b> flattened, 3–6 mm, leathery. <b>2n</b> = 66.</span><!--
  
 
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|publication year=1847
 
|publication year=1847
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_496.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_496.xml
 
|genus=Sequoia
 
|genus=Sequoia
 
|species=Sequoia sempervirens
 
|species=Sequoia sempervirens
|2n chromosome count=66
 
|abaxial band coloration=white
 
|abaxial band count=2
 
|abaxial band prominence=prominent
 
|abaxial stomatal coloration=white
 
|abaxial stomatal count=2
 
|abaxial stomatal prominence=prominent
 
|bark architecture=furrowed
 
|bark coloration=reddish-brown
 
|bark shape=ridged
 
|bark texture=fibrous
 
|bark thickness=0cm;35cm
 
|branch orientation=ascending;downward
 
|branch shape=sweeping
 
|branchlet orientation=ascending
 
|crown architecture=monopodial
 
|crown shape=conic;narrowed;conic
 
|leaf some measurement=1mm;30mm
 
|pollen cone arrangement=singly
 
|pollen cone shape=nearly globose;ovoid
 
|pollen cone some measurement=2mm;5mm
 
|portion fusion=free
 
|portion some measurement=0mm;30mm
 
|rank count=2
 
|seed shape=flattened
 
|seed some measurement=3mm;6mm
 
|seed texture=leathery
 
|seed-cone distance=1.3cm;3.5cm
 
|shoot arrangement=divergent
 
|shoot fixation or orientation=appressed
 
|shoot reproduction=fertile
 
|shoot shape=short-lanceolate;deltate
 
|tree some measurement=0m;110m
 
|trunk diameter=0m;9m
 
 
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Revision as of 14:22, 27 July 2019

Trees to ca. 110 m; trunk to 9 m diam.; crown conic and monopodial when young, narrowed conic in age. Bark reddish brown, to ca. 35 cm thick, fibrous, ridged and furrowed. Branches downward sweeping to slightly ascending. Leaves 1–30 mm, generally with stomates on both surfaces, the free portion to 30 mm, those on leaders, ascending branchlets, and fertile shoots divergent to strongly appressed, short-lanceolate to deltate, those on horizontally spreading to drooping branchlets mostly linear to linear-lanceolate, divergent and in 2 ranks, with 2 prominent, white abaxial stomatal bands. Pollen cones nearly globose to ovoid, 2–5 mm, borne singly on short terminal or axillary stalks. Seed cones 1.3–3.5 cm. Seeds flattened, 3–6 mm, leathery. 2n = 66.


Habitat: Coastal redwood forests
Elevation: generally below 300 m, occasionally to 1000 m

Discussion

Redwood is the only naturally occurring hexaploid conifer. It is one of only a few vegetatively reproducing conifers (from stump sprouts) and possibly the tallest tree species known. Winter buds, though small, are evident.

Redwood, including Sequoia sempervirens and Sequoiadendron giganteum, is the state tree of California.

Selected References

None.

Lower Taxa

None.