View source for Woodsia

{{Treatment/ID
|accepted_name=Woodsia
|accepted_authority=R. Brown
|publications={{Treatment/Publication
|title=Prodr.
|place=158. 1810
|year=1810
}}
|common_names=Cliff fern
|basionyms=
|synonyms=
|hierarchy=Dryopteridaceae;Woodsia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Dryopteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Woodsia]]</div></div>
|etymology=for English botanist Joseph Woods
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism growth form"><b>Plants </b>usually on rock.</span> <span class="statement" id="st-d0_s1" data-properties=""><b>Stems </b>compact to creeping;</span> <span class="statement" id="st-d0_s2" data-properties="stem architecture or arrangement;stem growth form or orientation;stem orientation;stem orientation;stolon presence">ascending or erect (rarely horizontal), stolons absent.</span> <span class="statement" id="st-d0_s3" data-properties="leaf architecture;leaf condition;next season season;next season duration"><b>Leaves </b>monomorphic, dying back over winter or sometimes persistent into the next season.</span> <span class="statement" id="st-d0_s4" data-properties="petiole length;base shape"><b>Petiole </b>1/5–3/4 length of blade, base not conspicuously swollen;</span> <span class="statement" id="st-d0_s5" data-properties="vascular-bundle quantity;vascular-bundle arrangement;vascular-bundle shape;vascular-bundle shape">vascular-bundles 2, arranged laterally, ± round or oblong in cross-section.</span> <span class="statement" id="st-d0_s6" data-properties="blade shape;blade shape;blade size;blade growth form or texture;apex shape"><b>Blade </b>linear to lanceolate or ovate, 1–2-pinnate-pinnatifid, gradually reduced distally to pinnatifid apex, herbaceous.</span> <span class="statement" id="st-d0_s7" data-properties="pinna architecture;segment margin architecture or shape;segment margin architecture or shape"><b>Pinnae </b>not articulate to rachis, segment margins entire to dentate, not spiny;</span> <span class="statement" id="st-d0_s8" data-properties="proximal pinna size;proximal pinna architecture;base architecture or shape">proximal pinnae somewhat reduced, sessile, bases usually ± equilateral;</span> <span class="statement" id="st-d0_s9" data-properties="costa architecture;groove architecture">costae often shallowly grooved adaxially, grooves ± continuous from rachis to costae;</span> <span class="statement" id="st-d0_s10" data-properties="hair indument presence">indument of glandular (occasionally nonglandular) hairs on both surfaces, rarely absent.</span> <span class="statement" id="st-d0_s11" data-properties="vein fusion;vein architecture;vein shape"><b>Veins </b>free, simple or forked.</span> <span class="statement" id="st-d0_s12" data-properties="sorus shape;between midrib and margin row quantity"><b>Sori </b>in 1 row between midrib and margin on ultimate segments, round;</span> <span class="statement" id="st-d0_s13" data-properties="indusium position;indusium shape;indusium duration;indusium prominence;segment quantity;segment texture;segment shape;sorus life cycle">indusia basal, dissected into several to numerous filamentous or scalelike segments encircling sorus, persistent but often obscure in mature sori.</span> <span class="statement" id="st-d0_s14" data-properties=""><b>Spores </b>brownish, cristate, rarely rugose.</span> <span class="statement" id="st-d0_s15" data-properties="spore coloration;spore shape;spore relief;x chromosome quantity;x chromosome quantity;x chromosome quantity">x = 38, 39, 41.</span><!--

-->{{Treatment/Body
|distribution=Mostly north temperate regions and higher elevations in the tropics
|discussion=<p>Woodsia is a well-marked genus; its morphology and chromosome base number (x = 41) provide evidence of relationships to the dryopteroid ferns. Most authors consider Cystopteris to be its closest ally, and the two genera are often confused in herbarium collections. The resemblance is superficial in many ways, however, and Woodsia is easily distinguished from Cystopteris by its persistent petiole bases, multilobed indusia, and obscure veins that end in hydathodes before reaching the leaf margin. The North American species of Woodsia fall into two natural groups that might be recognized as subgenera. Woodsia ilvensis, W. glabella, and W. alpina have articulate petioles, indusial segments that are uniseriate throughout and composed of cells that are much longer than wide, entire or crenate pinnules, strictly concolored stem scales, and chromosome base numbers of 39–41. They are circumboreal in distribution and show clear affinities to species found only in Eurasia. The remainder of the North American taxa have petioles that are not articulate, indusial segments that are multiseriate at the base and composed of cells that are isodiametric or slightly longer than wide, dentate pinnules, often bicolored stem scales, and a chromosome base number of 38. All of these species are endemic to the New World and probably represent a distinct lineage within the genus. Hybridization is common within these natural groups, but intergroup hybrids are relatively rare.</p><!--
--><p>Species ca. 30 (10 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=brown1964a
|text=Brown, D. F. M. 1964. A monographic study of the fern genus Woodsia. Nova Hedwigia 16: 1--154.
}}{{Treatment/Reference
|id=taylor1947a
|text=Taylor, T. M. C. 1947. New species and combinations in Woodsia section Perrinia. Amer. Fern J. 37: 84--88.
}}{{Treatment/Reference
|id=wagner1987a
|text=Wagner, F. S. 1987. Evidence for the origin of the hybrid cliff fern, Woodsia × abbeae (Aspleniaceae: Athyrioideae). Syst. Bot. 12: 116--124.
}}{{Treatment/Reference
|id=windham1987a
|text=Windham, M. D. 1987b. Chromosomal and electrophoretic studies of the genus Woodsia in North America. Amer. J. Bot. 74: 715.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Blades and rachises completely glabrous except for occasional sessile glands; proximal pinnae distinctly fan-shaped, usually wider than long; leaves 0.5-1.2 cm wide, mature petioles green or straw-colored throughout.
|[[Woodsia glabella|Woodsia glabella]]
|-id=key-0-1
|1
|Blades and/or rachises with scattered hairs, scales, or stalked glands, rarely glabrescent; proximal pinnae ovate-lanceolate to deltate, usually longer than wide; leaves 1.2-12 cm wide or, if less, then proximal portion of mature petioles reddish brown or dark purple.
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Petioles articulate well above base, abscission zone visible as swollen node; indusial segments uniseriate throughout, composed of cells that are many times longer than wide; pinnules entire or crenate, without acute teeth on margins.
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Petioles not articulate above base, swollen abscission zone absent; indusial segments usually multiseriate at base, composed of cells that are isodiametric or slightly longer than wide; pinnules dentate, with acute teeth on margins.
|[[#key-0-4| > 4]]
|-id=key-0-3
|3
|Linear-lanceolate scales absent or very rare on abaxial pinnae surfaces; rachises with widely scattered hairs and scales, sometimes nearly glabrous; largest pinnae with 1-3 pairs of pinnules.
|[[Woodsia alpina|Woodsia alpina]]
|-id=key-0-3
|3
|Linear-lanceolate scales common on abaxial pinnae surfaces; rachises with abundant hairs and scales; largest pinnae with 4-9 pairs of pinnules.
|[[Woodsia ilvensis|Woodsia ilvensis]]
|-id=key-0-4
|4
|Pinnae with flattened, multicellular hairs concentrated along midrib on both surfaces; mature petioles usually reddish brown or dark purple, relatively brittle and easily shattered.
|[[Woodsia scopulina|Woodsia scopulina]]
|-id=key-0-4
|4
|Pinnae lacking flattened, multicellular hairs along midrib; mature petioles light brown to straw-colored or, if reddish brown/dark purple (in Woodsia plummerae and W. oregana), somewhat pliable and resistant to shattering.
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Indusia composed of relatively broad segments, these multiseriate for most of length but often branched or divided distally.
|[[#key-0-6| > 6]]
|-id=key-0-5
|5
|Indusia composed of narrow, usually filamentous segments, these uniseriate for most of length.
|[[#key-0-8| > 8]]
|-id=key-0-6
|6
|Proximal portion of mature petioles reddish brown or dark purple; blades densely glandular, often somewhat viscid; vein tips not enlarged, barely visible on adaxial surface.
|[[Woodsia plummerae|Woodsia plummerae]]
|-id=key-0-6
|6
|Proximal portion of mature petioles light brown or straw-colored (sometimes darker at very base); blades sparsely to moderately glandular, rarely viscid; vein tips usually enlarged to form whitish hydathodes visible on adaxial surface.
|[[#key-0-7| > 7]]
|-id=key-0-7
|7
|Indusial segments branched or divided distally to form narrow, filamentous lobes; glandular hairs of blade with thin stalks and slightly expanded tips; pinnule margins usually thickened, lustrous on adaxial surface.
|[[Woodsia cochisensis|Woodsia cochisensis]]
|-id=key-0-7
|7
|Indusial segments often glandular along distal edge but otherwise nearly entire, not divided into narrow, filamentous lobes; many glandular hairs of blade with thick stalks and distinctly bulbous tips; pinnule margins not noticeably thickened or lustrous.
|[[Woodsia obtusa|Woodsia obtusa]]
|-id=key-0-8
|8
|Pinnule margins (viewed from abaxial surface) smooth to somewhat ragged but usually lacking translucent projections or filaments; proximal portion of mature petioles reddish brown or dark purple; indusial filaments generally inconspicuous, concealed by or slightly surpassing mature sporangia.
|[[Woodsia oregana|Woodsia oregana]]
|-id=key-0-8
|8
|Pinnule margins (viewed from abaxial surface) with translucent projections or filaments on teeth; proximal portion of mature petioles usually light brown or straw-colored (sometimes darker at very base); indusial filaments generally apparent, often greatly surpassing mature sporangia.
|[[#key-0-9| > 9]]
|-id=key-0-9
|9
|Translucent projections on pinnule margins mostly 1-2-celled, occasionally filamentous; spores averaging 44-52 µm; largest pinnae divided into 3-7 pairs of closely spaced pinnules, pinna apices usually abruptly tapered to rounded.
|[[Woodsia neomexicana|Woodsia neomexicana]]
|-id=key-0-9
|9
|Translucent projections on pinnule margins mostly multicellular, often prolonged to form twisted filaments; spores averaging 37-44 µm; largest pinnae with 7-18 pairs of discrete, widely spaced pinnules, pinna apices often attenuate to narrowly acute.
|[[Woodsia phillipsii|Woodsia phillipsii]]
|}
</div></div><!--

-->{{#Taxon:
name=Woodsia
|author=Michael D. Windham
|authority=R. Brown
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Dryopteridaceae
|distribution=Mostly north temperate regions and higher elevations in the tropics
|reference=brown1964a;taylor1947a;wagner1987a;windham1987a
|publication title=Prodr.
|publication year=1810
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V2/V2_17.xml
|genus=Woodsia
|apex shape=pinnatifid
|base architecture or shape=equilateral
|base shape=swollen
|between midrib and margin row quantity=1
|blade growth form or texture=herbaceous
|blade shape=1-2-pinnate-pinnatifid;linear;lanceolate or ovate
|blade size=reduced
|costa architecture=grooved
|groove architecture=continuous
|hair indument presence=absent
|indusium duration=persistent
|indusium position=basal
|indusium prominence=obscure
|indusium shape=dissected
|leaf architecture=monomorphic
|leaf condition=dying
|next season duration=persistent
|next season season=winter
|petiole length=1/5 length of blade;3/4 length of blade
|pinna architecture=not articulate
|proximal pinna architecture=sessile
|proximal pinna size=reduced
|segment margin architecture or shape=not spiny;entire;dentate
|segment quantity=several;numerous
|segment shape=scale-like
|segment texture=filamentous
|sorus life cycle=mature
|sorus shape=round
|spore coloration=brownish
|spore relief=rugose
|spore shape=cristate
|stem architecture or arrangement=compact
|stem growth form or orientation=creeping
|stem orientation=erect;ascending
|stolon presence=absent
|vascular-bundle arrangement=arranged
|vascular-bundle quantity=2
|vascular-bundle shape=oblong;round
|vein architecture=simple
|vein fusion=free
|vein shape=forked
|whole_organism growth form=plant
|x chromosome quantity=41;39;38
}}<!--

-->[[Category:Treatment]][[Category:Dryopteridaceae]]