Difference between revisions of "Diplazium"

Swartz

J. Bot. (Schrader) 1800(2): 4, 61. 1801.

Common names: Twin-sorus fern
Etymology: Greek diplazein, double, or di, two, and plasion, oblong, referring to a double sorus
Synonyms: Homalosorus Small ex Pichi-Sermolli
Treatment appears in FNA Volume 2.
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--><span class="statement" id="st-d0_s0" data-properties="plant growth form or habitat;plant growth form or habitat"><b>Plants </b>terrestrial or on rock.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem orientation;stem orientation;stem orientation;stem orientation;stolon count"><b>Stems </b>creeping, ascending, or erect, stolons absent.</span> <span class="statement" id="st-d0_s2" data-properties="leaf architecture;leaf duration;leaf condition"><b>Leaves </b>monomorphic, evergreen or dying back in winter.</span> <span class="statement" id="st-d0_s3" data-properties="petiole count;blade length;base shape;base duration"><b>Petiole </b>ca. 1/2 to equaling length of blade, base swollen and persisting as trophopod over winter or not;</span> <span class="statement" id="st-d0_s4" data-properties="vascular-bundle count;vascular-bundle position;vascular-bundle shape">vascular-bundles 2, lateral, lunate in cross-section.</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade size;blade texture;blade texture;blade texture;apex shape;pinna arrangement"><b>Blade </b>oblong-lanceolate to deltate, 1-pinnate to 2-pinnate-pinnatifid [simple to 4-pinnate-pinnatifid], gradually reduced distally to pinnatifid apex or apical pinna similar to (conform) adjacent pinnae, herbaceous to papery.</span> <span class="statement" id="st-d0_s6" data-properties="pinna architecture;segment margin shape;segment margin shape;segment margin shape;segment margin shape;segment margin shape"><b>Pinnae </b>not articulate to rachis, segment margins entire, crenulate, or serrate;</span> <span class="statement" id="st-d0_s7" data-properties="proximal pinna size;proximal pinna architecture;proximal pinna shape;proximal pinna shape">proximal pinnae not reduced, sessile, equilateral or inequilateral;</span> <span class="statement" id="st-d0_s8" data-properties="costa architecture;groove architecture">costae adaxially deeply grooved, grooves continuous with that of rachis;</span> <span class="statement" id="st-d0_s9" data-properties="indument count;indument count;indument count;scale shape;scale shape;scale shape">indument abaxially absent or of linear to ovate scales, adaxially absent.</span> <span class="statement" id="st-d0_s10" data-properties="vein fusion;vein architecture;vein shape;vein position;segment arrangement;segment architecture"><b>Veins </b>free, simple or forked, or basal pairs of adjacent segments anastomosing.</span> <span class="statement" id="st-d0_s11" data-properties="sorus count;sorus arrangement;sorus orientation;sorus shape;sorus course;sorus shape"><b>Sori </b>single or paired back-to-back on veins, oblong to linear, straight or slightly falcate;</span> <span class="statement" id="st-d0_s12" data-properties="indusium arrangement or course or shape;indusium fixation;indusium duration">indusia linear, laterally attached, persistent.</span> <span class="statement" id="st-d0_s13" data-properties=""><b>Spores </b>brownish, usually broadly winged.</span> <span class="statement" id="st-d0_s14" data-properties="spore coloration;spore architecture;x chromosome count;x chromosome count">x = 40, 41.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>terrestrial or on rock. <b>Stems</b> creeping, ascending, or erect, stolons absent. <b>Leaves</b> monomorphic, evergreen or dying back in winter. <b>Petiole</b> ca. 1/2 to equaling length of blade, base swollen and persisting as trophopod over winter or not; vascular bundles 2, lateral, lunate in cross section. <b>Blade</b> oblong-lanceolate to deltate, 1-pinnate to 2-pinnate-pinnatifid [simple to 4-pinnate-pinnatifid], gradually reduced distally to pinnatifid apex or apical pinna similar to (conform) adjacent pinnae, herbaceous to papery. <b>Pinnae</b> not articulate to rachis, segment margins entire, crenulate, or serrate; proximal pinnae not reduced, sessile, equilateral or inequilateral; costae adaxially deeply grooved, grooves continuous with that of rachis; indument abaxially absent or of linear to ovate scales, adaxially absent. <b>Veins</b> free, simple or forked, or basal pairs of adjacent segments anastomosing. <b>Sori</b> single or paired back-to-back on veins, oblong to linear, straight or slightly falcate; indusia linear, laterally attached, persistent. <b>Spores</b> brownish, usually broadly winged. <b>x</b> = 40, 41.</span><!--
  
 
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|publication year=1801
 
|publication year=1801
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_112.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_112.xml
 
|genus=Diplazium
 
|genus=Diplazium
|apex shape=pinnatifid
 
|base duration=persisting
 
|base shape=swollen
 
|blade length=equaling
 
|blade shape=oblong-lanceolate;deltate 1-pinnate
 
|blade size=reduced
 
|blade texture=herbaceous;papery
 
|costa architecture=grooved
 
|groove architecture=continuous
 
|indument count=absent;of linear to ovate scales;absent
 
|indusium arrangement or course or shape=linear
 
|indusium duration=persistent
 
|indusium fixation=attached
 
|leaf architecture=monomorphic
 
|leaf condition=dying
 
|leaf duration=evergreen
 
|petiole count=1/2
 
|pinna architecture=not articulate
 
|pinna arrangement=adjacent
 
|plant growth form or habitat=on rock;terrestrial
 
|proximal pinna architecture=sessile
 
|proximal pinna shape=inequilateral;equilateral
 
|proximal pinna size=not reduced
 
|scale shape=linear;ovate
 
|segment architecture=anastomosing
 
|segment arrangement=adjacent
 
|segment margin shape=serrate;crenulate;serrate;crenulate;entire
 
|sorus arrangement=paired
 
|sorus count=single
 
|sorus course=straight
 
|sorus orientation=back;back
 
|sorus shape=falcate;oblong to linear
 
|spore architecture=winged
 
|spore coloration=brownish
 
|stem orientation=erect;ascending;erect;ascending;creeping
 
|stolon count=absent
 
|vascular-bundle count=2
 
|vascular-bundle position=lateral
 
|vascular-bundle shape=lunate
 
|vein architecture=simple
 
|vein fusion=free
 
|vein position=basal
 
|vein shape=forked
 
|x chromosome count=41;40
 
 
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Revision as of 13:11, 27 July 2019

Plants terrestrial or on rock. Stems creeping, ascending, or erect, stolons absent. Leaves monomorphic, evergreen or dying back in winter. Petiole ca. 1/2 to equaling length of blade, base swollen and persisting as trophopod over winter or not; vascular bundles 2, lateral, lunate in cross section. Blade oblong-lanceolate to deltate, 1-pinnate to 2-pinnate-pinnatifid [simple to 4-pinnate-pinnatifid], gradually reduced distally to pinnatifid apex or apical pinna similar to (conform) adjacent pinnae, herbaceous to papery. Pinnae not articulate to rachis, segment margins entire, crenulate, or serrate; proximal pinnae not reduced, sessile, equilateral or inequilateral; costae adaxially deeply grooved, grooves continuous with that of rachis; indument abaxially absent or of linear to ovate scales, adaxially absent. Veins free, simple or forked, or basal pairs of adjacent segments anastomosing. Sori single or paired back-to-back on veins, oblong to linear, straight or slightly falcate; indusia linear, laterally attached, persistent. Spores brownish, usually broadly winged. x = 40, 41.

Discussion

In a few species outside the flora, rachises and costae bear multicellular hairs like those of Deparia, which differs from Diplazium in having grooves of costae not decurrent onto rachis groove, veins free or anastomosing, sori long or short and costular, and indusia present or absent. Many species of Diplazium are known to reproduce apogamously.

Species about 400 (3 in the flora).

Key

1 Leaves 2-pinnate; veins anastomosing. Diplazium esculentum
1 Leaves 1-pinnate or 1-pinnate-pinnatifid; veins free. > 2
2 Scales brown, entire; pinnae nearly entire. Diplazium pycnocarpon
2 Scales dark brown, dentate; pinnae lobed. Diplazium lonchophyllum