View source for Thelypteris augescens

{{Treatment/ID
|accepted_name=Thelypteris augescens
|accepted_authority=(Link) Munz & I. M. Johnston
|publications={{Treatment/Publication
|title=Amer. Fern J.
|place=12: 75. 1922
|year=1922
}}
|common_names=Abrupt-tipped maiden fern
|basionyms={{Treatment/ID/Synonym
|name=Aspidium augescens
|authority=Link
}}
|synonyms={{Treatment/ID/Synonym
|name=Christella augescens
|authority=(Link) Pichi-Sermolli
}}{{Treatment/ID/Synonym
|name=Dryopteris augescens
|authority=(Link) C. Christensen
}}
|hierarchy=Thelypteridaceae;Thelypteris;Thelypteris subg. Cyclosorus;Thelypteris augescens
|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. Cyclosorus]]</div><div class="higher-taxon"><small>species</small>[[Thelypteris augescens]]</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>creeping, 4–8 mm diam.</span> <span class="statement" id="st-d0_s1" data-properties="leaf architecture;leaf duration;leaf atypical some measurement;leaf some measurement;leaf arrangement;leaf atypical some measurement;leaf some measurement"><b>Leaves </b>monomorphic, evergreen, (0.5–) 1–3.5 cm apart, (30–) 65–140 cm.</span> <span class="statement" id="st-d0_s2" data-properties="petiole coloration;petiole length;petiole atypical width;petiole width;petiole shape;petiole pubescence;scale coloration;scale coloration;scale coloration"><b>Petiole </b>straw-colored, 15–70 cm × 2–7 (–9) mm, at base with scales tan to brownish, linear-lanceolate, hairy at margin.</span> <span class="statement" id="st-d0_s3" data-properties="blade some measurement;blade width;blade shape;apical pinna length;apical pinna atypical width;apical pinna width"><b>Blade </b>30–70 cm, broadest at or near base, abruptly narrowed distally, apical pinna ± similar to lateral pinnae, 5–17 × 1–3 (–5) cm.</span> <span class="statement" id="st-d0_s4" data-properties="pinna atypical length;pinna atypical length;pinna length;pinna atypical width;pinna width;pinna shape;pinna width"><b>Pinnae </b>(4–) 10–22 (–28) × (0.3–) 0.7–1.5 cm, incised 1/2–3/4 of width;</span> <span class="statement" id="st-d0_s5" data-properties="segment course;margin shape or vernation;base shape">segments somewhat curved, margins revolute, those at base of proximal pinnae slightly elongate;</span> <span class="statement" id="st-d0_s6" data-properties="segment arrangement">proximal pair of veins from adjacent segments running to sinus.</span> <span class="statement" id="st-d0_s7" data-properties="indument some measurement;vein some measurement;scale coloration"><b>Indument </b>abaxially of hairs 0.2–0.4 mm on costae, veins, and blade tissue, also of brownish scales 0.6–1.2 mm on costae;</span> <span class="statement" id="st-d0_s8" data-properties="vein pubescence;blade tissue pubescence">veins and blade tissue glabrous adaxially.</span> <span class="statement" id="st-d0_s9" data-properties="sorus shape;sorus position;sorus position;sorus position"><b>Sori </b>round, medial to supramedial;</span> <span class="statement" id="st-d0_s10" data-properties="indusium coloration;indusium some measurement">indusia tan, bearing hairs 0.2–0.4 mm;</span> <span class="statement" id="st-d0_s11" data-properties="">sporangia glabrous.</span> <span class="statement" id="st-d0_s12" data-properties="sporangium pubescence;2n chromosome count">2n = 144.</span><!--

-->{{Treatment/Body
|habitat=Limestone banks, in sun or partial shade
|elevation=0–50 m
|distribution=Fla.;s Mexico;West Indies in the Bahamas;Cuba;Central America in Guatemala.
|discussion=<p>Thelypteris augescens occasionally hybridizes with T. kunthii and T. ovata var. ovata in southern Florida.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Thelypteris augescens
|author=
|authority=(Link) Munz & I. M. Johnston
|rank=species
|parent rank=subgenus
|synonyms=Christella augescens;Dryopteris augescens
|basionyms=Aspidium augescens
|family=Thelypteridaceae
|habitat=Limestone banks, in sun or partial shade
|elevation=0–50 m
|distribution=Fla.;s Mexico;West Indies in the Bahamas;Cuba;Central America in Guatemala.
|reference=None
|publication title=Amer. Fern J.
|publication year=1922
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_125.xml
|genus=Thelypteris
|subgenus=Thelypteris subg. Cyclosorus
|species=Thelypteris augescens
|2n chromosome count=144
|apical pinna atypical width=3cm;5cm
|apical pinna length=5cm;17cm
|apical pinna width=1cm;3cm
|base shape=elongate
|blade shape=narrowed
|blade some measurement=30cm;70cm
|blade tissue pubescence=glabrous
|blade width=broadest
|indument some measurement=0.2mm;0.4mm
|indusium coloration=tan
|indusium some measurement=0.2mm;0.4mm
|leaf architecture=monomorphic
|leaf arrangement=apart
|leaf atypical some measurement=30cm;65cm
|leaf duration=evergreen
|leaf some measurement=65cm;140cm
|margin shape or vernation=revolute
|petiole atypical width=7mm;9mm
|petiole coloration=straw-colored
|petiole length=15cm;70cm
|petiole pubescence=hairy
|petiole shape=linear-lanceolate
|petiole width=2mm;7mm
|pinna atypical length=22cm;28cm
|pinna atypical width=0.3cm;0.7cm
|pinna length=10cm;22cm
|pinna shape=incised
|pinna width=1/2;3/4
|scale coloration=brownish;tan;brownish
|segment arrangement=adjacent
|segment course=curved
|sorus position=medial;supramedial
|sorus shape=round
|sporangium pubescence=glabrous
|stem diameter=4mm;8mm
|stem growth form or orientation=creeping
|vein pubescence=glabrous
|vein some measurement=0.6mm;1.2mm
}}<!--

-->[[Category:Treatment]][[Category:Thelypteris subg. Cyclosorus]]