View source for Bucklandiella obesa

{{Treatment/ID
|accepted_name=Bucklandiella obesa
|accepted_authority=(Frisvoll) Bednarek-Ochyra & Ochyra in R. Ochyra et al.
|publications={{Treatment/Publication
|title=in R. Ochyra et al., Cens. Cat. Polish Mosses,
|place=146. 2003,
}}
|basionyms={{Treatment/ID/Basionym
|name=Racomitrium obesum
|authority=Frisvoll
|rank=species
|publication_title=Gunneria
|publication_place=59: 117, figs. 29, 30. 1988
}}
|synonyms=
|hierarchy=Grimmiaceae;Grimmiaceae subfam. Racomitrioideae;Bucklandiella;Bucklandiella sect. Laevifoliae;Bucklandiella obesa
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Grimmiaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Grimmiaceae subfam. Racomitrioideae]]</div><div class="higher-taxon"><small>genus</small>[[Bucklandiella]]</div><div class="higher-taxon"><small>section</small>[[Bucklandiella sect. Laevifoliae]]</div><div class="higher-taxon"><small>species</small>[[Bucklandiella obesa]]</div></div>
|volume=Volume 27
|mention_page=page 270, 273
|treatment_page=page 275
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism size;whole_organism relief;whole_organism texture;whole_organism growth form;whole_organism coloration;whole_organism growth form;patch width;patch coloration;patch coloration"><b>Plants </b>large, coarse and rigid, loosely caespitose of forming wide patches, olivaceous to greenish, occasionally somewhat grayish in the upper part, brown proximally.</span> <span class="statement" id="st-d0_s1" data-properties="stem atypical some measurement;stem some measurement;stem orientation;stem architecture;stem architecture"><b>Stems </b>3–4 (–11) cm, ascending to erect, almost unbranched to dichotomously branched, rarely more profusely irregularly branched.</span> <span class="statement" id="st-d0_s2" data-properties="leaf orientation;leaf orientation;leaf fragility;leaf shape;leaf length;leaf width"><b>Leaves </b>erect to slightly recurved when dry, erect-spreading when moist, stiff, broadly lanceolate, 3–4 × 0.7–1 mm;</span> <span class="statement" id="st-d0_s3" data-properties="row atypical quantity;row quantity">margins broadly revolute to recurved throughout on both sides, 2 (–3) -stratose distally in 2 (–3) rows of cells;</span> <span class="statement" id="st-d0_s4" data-properties="margin shape or vernation;margin orientation;margin architecture;margin shape;awn height or length or size;awn some measurement;awn fragility;awn course;awn course;awn shape;awn architecture or shape">piliferous, awn short, 0.1–1 mm, stiff, straight or weakly flexuose, faintly or distinctly denticulate and spinulose;</span> <span class="statement" id="st-d0_s5" data-properties="costa fragility;costa architecture;costa shape;costa shape;costa width;costa architecture;abaxial side width;cell quantity;cell size;adaxial side shape">costa robust, percurrent, usually broadly canaliculate in mid leaf, strongly convex on the abaxial side, 80–120 µm wide basally and 50–65 µm wide distally, 3–4 (–5) -stratose in the basal and median parts with 4–9 not enlarged cells on the adaxial side, elliptical to rectangular in outline in cross-section;</span> <span class="statement" id="st-d0_s6" data-properties="laminal cell architecture or pubescence or relief;laminal cell architecture">laminal cells smooth, 1-stratose;</span> <span class="statement" id="st-d0_s7" data-properties="">basal lamianl cells long-rectangular to linear, 20–70 × 7–9 µm, porose and nodulose;</span> <span class="statement" id="st-d0_s8" data-properties="cell shape;cell length;cell width;cell architecture;cell shape;cell variability">alar cells not or slightly differentiated;</span> <span class="statement" id="st-d0_s9" data-properties="basal marginal border variability">basal marginal border not differentiated;</span> <span class="statement" id="st-d0_s10" data-properties="medial and distal laminal cell shape;medial and distal laminal cell length;medial and distal laminal cell width;inner perichaetial leaf development;inner perichaetial leaf coloration;inner perichaetial leaf texture;inner perichaetial leaf shape;apex height or length or size">medial and distal laminal cells short-rectangular, 5–25 × 5–9 µm. <b>Inner</b> perichaetial leaves strongly modified, hyaline, membranous, ovate with a short apex.</span> <span class="statement" id="st-d0_s11" data-properties="seta coloration;seta some measurement"><b>Seta </b>brown, 3–5 mm.</span> <span class="statement" id="st-d0_s12" data-properties="capsule coloration;capsule shape;capsule length;capsule width"><b>Capsule </b>brown, narrowly cylindric, 1.5–2.5 × 0.45–0.5 mm;</span> <span class="statement" id="st-d0_s13" data-properties="peristome tooth some measurement;peristome tooth relief;peristome tooth shape;peristome tooth orientation;peristome tooth some measurement">peristome teeth 400–500 µm, densely papillose, irregularly 2-fid, arising from a low, to 25 µm, basal membrane.</span> <span class="statement" id="st-d0_s14" data-properties="spore some measurement"><b>Spores </b>12–17 µm.</span><!--

-->{{Treatment/Body
|habitat=Dry rocks, stones, boulders, cliffs, rock ledges, rocky ground and soil over rocks, predominantly on acidic substrates, very seldom on limestone
|elevation=moderate to high elevations (600-1800 m)
|distribution=B.C.;Calif.;Oreg.;Wash.
|discussion=<p>Bucklandiella obesa ranges from Vancouver Island to central California at higher elevations. The species is well-defined and distinct from all other congeners by the combination of several structural characters, including strongly modified, hyaline innermost perichaetial leaves, large leaves with a stiff awn, leaf margins that are broadly revolute to recurved to the apex and 2-stratose distally in 2(–3) rows of cells, not differentiated alar cells and basal marginal border, and robust and broad costa, distinctly convex abaxially with 5–9 adaxial cells. It is strikingly more robust than B. heterosticha and B. affinis, the other two species of sect. Laevifoliae that have predominantly 1-stratose and even leaf margins in the distal portion and longer, flexuose, and less spinulose awns. Bucklandiella venusta is easily distinct in its shorter and narrower leaves and much narrower costa as well as in being a much smaller plant. Bucklandiella obesa has often been confused with Codriophorus varius, with which it shares similar robustness and long-cylindrical capsules. However, the latter is readily distinct in its laminal cells that are papillose in a manner characteristic of that genus, much longer peristome teeth, consistently 1-stratose leaf margin, and presence of the pellucid basal marginal border.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Bucklandiella obesa
|authority=(Frisvoll) Bednarek-Ochyra & Ochyra in R. Ochyra et al.
|rank=species
|parent rank=section
|synonyms=
|basionyms=Racomitrium obesum
|family=Grimmiaceae
|habitat=Dry rocks, stones, boulders, cliffs, rock ledges, rocky ground and soil over rocks, predominantly on acidic substrates, very seldom on limestone
|elevation=moderate to high elevations (600-1800 m)
|distribution=B.C.;Calif.;Oreg.;Wash.
|reference=None
|publication title=in R. Ochyra et al., Cens. Cat. Polish Mosses,
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V27/V27_379.xml
|subfamily=Grimmiaceae subfam. Racomitrioideae
|genus=Bucklandiella
|section=Bucklandiella sect. Laevifoliae
|species=Bucklandiella obesa
|abaxial side width=80um;120um
|adaxial side shape=elliptical;rectangular
|apex height or length or size=short
|awn architecture or shape=spinulose
|awn course=flexuose;straight
|awn fragility=stiff
|awn height or length or size=short
|awn shape=denticulate
|awn some measurement=0.1mm;1mm
|basal marginal border variability=not differentiated
|capsule coloration=brown
|capsule length=1.5mm;2.5mm
|capsule shape=cylindric
|capsule width=0.45mm;0.5mm
|cell architecture=porose
|cell length=20um;70um
|cell quantity=4;9
|cell shape=nodulose;long-rectangular;linear
|cell size=not enlarged
|cell variability=differentiated
|cell width=7um;9um
|costa architecture=3-4(-5)-stratose;percurrent
|costa fragility=robust
|costa shape=convex;canaliculate
|costa width=50um;65um
|inner perichaetial leaf coloration=hyaline
|inner perichaetial leaf development=modified
|inner perichaetial leaf shape=ovate
|inner perichaetial leaf texture=membranous
|laminal cell architecture=1-stratose
|laminal cell architecture or pubescence or relief=smooth
|leaf fragility=stiff
|leaf length=3mm;4mm
|leaf orientation=erect-spreading;erect;slightly recurved
|leaf shape=lanceolate
|leaf width=0.7mm;1mm
|margin architecture=2(-3)-stratose
|margin orientation=recurved
|margin shape=piliferous
|margin shape or vernation=revolute
|medial and distal laminal cell length=5um;25um
|medial and distal laminal cell shape=short-rectangular
|medial and distal laminal cell width=5um;9um
|patch coloration=grayish;olivaceous;greenish
|patch width=wide
|peristome tooth orientation=arising
|peristome tooth relief=papillose
|peristome tooth shape=2-fid
|peristome tooth some measurement=0um;25um
|row atypical quantity=2;3
|row quantity=2
|seta coloration=brown
|seta some measurement=3mm;5mm
|spore some measurement=12um;17um
|stem architecture=branched;unbranched;dichotomously branched
|stem atypical some measurement=4cm;11cm
|stem orientation=ascending;erect
|stem some measurement=3cm;4cm
|whole_organism coloration=brown
|whole_organism growth form=plant;caespitose
|whole_organism relief=coarse
|whole_organism size=large
|whole_organism texture=rigid
}}<!--

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