View source for Thelypteris pilosa var. alabamensis

{{Treatment/ID
|accepted_name=Thelypteris pilosa var. alabamensis
|accepted_authority=Crawford
|publications={{Treatment/Publication
|title=Amer. Fern J.
|place=41: 19. 1951
|year=1951
}}
|common_names=Alabama streak-sorus fern
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Leptogramma pilosa var. alabamensis
|authority=(Crawford) Wherry
}}{{Treatment/ID/Synonym
|name=Stegnogramma pilosa var. alabamensis
|authority=(Crawford) K. Iwatsuki
}}
|hierarchy=Thelypteridaceae;Thelypteris;Thelypteris subg. Stegnogramma;Thelypteris pilosa;Thelypteris pilosa var. alabamensis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Thelypteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Thelypteris]]</div><div class="higher-taxon"><small>subgenus</small>[[Thelypteris subg. Stegnogramma]]</div><div class="higher-taxon"><small>species</small>[[Thelypteris pilosa]]</div><div class="higher-taxon"><small>variety</small>[[Thelypteris pilosa var. alabamensis]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="stem growth form or orientation;stem diameter"><b>Stems </b>short-creeping, 1.5–2.5 mm diam.</span> <span class="statement" id="st-d0_s1" data-properties="leaf architecture;leaf duration;leaf arrangement or growth form;leaf some measurement;leaf arrangement;leaf some measurement"><b>Leaves </b>monomorphic, evergreen, clustered, 0.1–1 cm apart, 10–45 cm.</span> <span class="statement" id="st-d0_s2" data-properties="petiole coloration;petiole atypical length;petiole length;petiole width;scale shape;scale pubescence"><b>Petiole </b>straw-colored, (1.5–) 5–20 cm × ca. 1 mm, at base very sparsely set with ovatelanceolate, hairy scales;</span> <span class="statement" id="st-d0_s3" data-properties="blade shape;blade atypical some measurement;blade some measurement;blade shape;blade position;blade count;pinna length;pinna shape;pinna shape;pinna shape">blades linear-lanceolate, to ca. 30 (–40) cm, slightly narrowed at base, proximal 1–3 pinna pairs slightly shortened, gradually tapered to pinnatifid apex.</span> <span class="statement" id="st-d0_s4" data-properties="pinna orientation;pinna shape;pinna length;pinna width;proximal pinna architecture;proximal pinna shape;proximal pinna shape;proximal pinna shape;proximal pinna width;distal pinna some measurement;distal pinna fusion;basal segment count;basal segment orientation;basal segment fusion"><b>Pinnae </b>spreading, rounded at tip, 0.5–3 × 0.5–1.3 cm, proximal pinnae stalked to 3 mm, distal pinnae broadly adnate and basiscopically decurrent, crenate or incised 1/4–1/2 width or single basal acroscopic segment on proximal pinnae nearly or quite free;</span> <span class="statement" id="st-d0_s5" data-properties="segment orientation or shape;segment shape">segments somewhat oblique, rounded at tip;</span> <span class="statement" id="st-d0_s6" data-properties="segment arrangement">proximal pair of veins from adjacent segments running to sinus or nearly so.</span> <span class="statement" id="st-d0_s7" data-properties="side some measurement;hair width;hair fragility or size"><b>Indument </b>on both sides of thin to stout hairs mostly 0.2–1.5 mm on costae, veins, and blade tissue.</span> <span class="statement" id="st-d0_s8" data-properties="sorus shape;indusium count"><b>Sori </b>elongate along veins, lacking indusia;</span> <span class="statement" id="st-d0_s9" data-properties="sporangium pubescence;hair some measurement">sporangia often minutely hairy on capsule, hairs 0.1–0.2 mm.</span><!--

-->{{Treatment/Body
|habitat=On sandstone cliffs in river gorges
|elevation=150 m
|distribution=Ala.;Mexico in Chihuahua;Sonora.
|discussion=<p>Thelypteris pilosa is included in the Asian and African genus Stegnogramma by K. Iwatsuki (1964). Variety alabamensis differs from var. pilosa in Mexico and Central America by the much narrower blades, spreading (vs. ascending) pinnae with rounded tips, and free or nearly free basal acroscopic segment on the proximal pinnae. The Winston County, Alabama, populations are remarkably disjunct, about 2000 km from the nearest Mexican populations of both varieties.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Thelypteris pilosa var. alabamensis
|author=
|authority=Crawford
|rank=variety
|parent rank=species
|synonyms=Leptogramma pilosa var. alabamensis;Stegnogramma pilosa var. alabamensis
|basionyms=
|family=Thelypteridaceae
|habitat=On sandstone cliffs in river gorges
|elevation=150 m
|distribution=Ala.;Mexico in Chihuahua;Sonora.
|reference=None
|publication title=Amer. Fern J.
|publication year=1951
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_600.xml
|genus=Thelypteris
|subgenus=Thelypteris subg. Stegnogramma
|species=Thelypteris pilosa
|variety=Thelypteris pilosa var. alabamensis
|basal segment count=single
|basal segment fusion=free
|basal segment orientation=acroscopic
|blade atypical some measurement=30cm;40cm
|blade count=1;3
|blade position=proximal
|blade shape=narrowed;linear-lanceolate
|blade some measurement=0cm;30cm
|distal pinna fusion=adnate
|distal pinna some measurement=3
|hair fragility or size=stout
|hair some measurement=0.1mm;0.2mm
|hair width=thin
|indusium count=lacking
|leaf architecture=monomorphic
|leaf arrangement=apart
|leaf arrangement or growth form=clustered
|leaf duration=evergreen
|leaf some measurement=10cm;45cm
|petiole atypical length=1.5cm;5cm
|petiole coloration=straw-colored
|petiole length=5cm;20cm
|petiole width=1
|pinna length=0.5cm;3cm
|pinna orientation=spreading
|pinna shape=rounded;gradually tapered;pinnatifid
|pinna width=0.5cm;1.3cm
|proximal pinna architecture=stalked
|proximal pinna shape=incised;crenate;decurrent
|proximal pinna width=1/4;1/2
|scale pubescence=hairy
|scale shape=ovatelanceolate
|segment arrangement=adjacent
|segment orientation or shape=oblique
|segment shape=rounded
|side some measurement=0.2mm;1.5mm
|sorus shape=elongate
|sporangium pubescence=hairy
|stem diameter=1.5mm;2.5mm
|stem growth form or orientation=short-creeping
}}<!--

-->[[Category:Treatment]][[Category:Thelypteris pilosa]]