Difference between revisions of "Sequoiadendron"

J. Buchholz

Amer. J. Bot. 26: 536. 1939.

Etymology: Sequoia, generic name of coast redwood, and Greek dendros, tree
Treatment appears in FNA Volume 2.
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--><span class="statement" id="st-d0_s0" data-properties="tree size;tree duration"><b>Trees </b>giant, evergreen.</span> <span class="statement" id="st-d0_s1" data-properties="branchlet shape"><b>Branchlets </b>terete.</span> <span class="statement" id="st-d0_s2" data-properties="leaf arrangement;leaf arrangement"><b>Leaves </b>alternate, radiating.</span> <span class="statement" id="st-d0_s3" data-properties="leaf life cycle;leaf architecture or shape;leaf shape;leaf arrangement;leaf fixation or orientation"><b>Adult </b>leaves mostly needlelike, triangular in cross-section, somewhat divergent to strongly appressed;</span> <span class="statement" id="st-d0_s4" data-properties="abaxial gland count">abaxial glands absent.</span> <span class="statement" id="st-d0_s5" data-properties="sporophyll count;pollen-sac count"><b>Pollen </b>cones with 12–20 sporophylls, each sporophyll with 2–5 pollen-sacs.</span> <span class="statement" id="st-d0_s6" data-properties="seed-cone life cycle;seed-cone duration;seed-cone count;seed-cone shape;year count"><b>Seed-</b>cones maturing and opening in 2 years, persistent to 20 years, oblong;</span> <span class="statement" id="st-d0_s7" data-properties="scale duration;scale count;scale arrangement or dehiscence;scale architecture;scale width;scale texture">scales persistent, 25–45, valvate, ± peltate, thick and woody.</span> <span class="statement" id="st-d0_s8" data-properties="seed count;seed shape;seed architecture"><b>Seeds </b>3–9 per scale, lenticular, subequally 2-winged;</span> <span class="statement" id="st-d0_s9" data-properties="">cotyledons (3–) 4 (–6).</span> <span class="statement" id="st-d0_s10" data-properties="cotyledon atypical count;cotyledon atypical count;cotyledon count;x chromosome count">x = 11.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>giant, evergreen. <b>Branchlets</b> terete. <b>Leaves</b> alternate, radiating. <b>Adult</b> leaves mostly needlelike, triangular in cross section, somewhat divergent to strongly appressed; abaxial glands absent. <b>Pollen</b> cones with 12–20 sporophylls, each sporophyll with 2–5 pollen sacs. <b>Seed</b> cones maturing and opening in 2 years, persistent to 20 years, oblong; scales persistent, 25–45, valvate, ± peltate, thick and woody. <b>Seeds</b> 3–9 per scale, lenticular, subequally 2-winged; cotyledons (3–)4(–6). <b>x</b> = 11.</span><!--
  
 
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|publication year=1939
 
|publication year=1939
 
|special status=
 
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_83.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_83.xml
 
|genus=Sequoiadendron
 
|genus=Sequoiadendron
|abaxial gland count=absent
 
|branchlet shape=terete
 
|cotyledon atypical count=4;6
 
|cotyledon count=4
 
|leaf architecture or shape=needlelike
 
|leaf arrangement=divergent;radiating;alternate
 
|leaf fixation or orientation=appressed
 
|leaf life cycle=adult
 
|leaf shape=triangular
 
|pollen-sac count=2;5
 
|scale architecture=peltate
 
|scale arrangement or dehiscence=valvate
 
|scale count=25;45
 
|scale duration=persistent
 
|scale texture=woody
 
|scale width=thick
 
|seed architecture=2-winged
 
|seed count=3;9
 
|seed shape=lenticular
 
|seed-cone count=0;20
 
|seed-cone duration=persistent
 
|seed-cone life cycle=maturing
 
|seed-cone shape=oblong
 
|sporophyll count=12;20
 
|tree duration=evergreen
 
|tree size=giant
 
|x chromosome count=11
 
|year count=2
 
 
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Latest revision as of 20:25, 5 November 2020

Trees giant, evergreen. Branchlets terete. Leaves alternate, radiating. Adult leaves mostly needlelike, triangular in cross section, somewhat divergent to strongly appressed; abaxial glands absent. Pollen cones with 12–20 sporophylls, each sporophyll with 2–5 pollen sacs. Seed cones maturing and opening in 2 years, persistent to 20 years, oblong; scales persistent, 25–45, valvate, ± peltate, thick and woody. Seeds 3–9 per scale, lenticular, subequally 2-winged; cotyledons (3–)4(–6). x = 11.

Distribution

Only in the flora.

Discussion

Species 1.

Selected References

None.