View source for Ptychostomum calophyllum

{{Treatment/ID
|accepted_name=Ptychostomum calophyllum
|accepted_authority=(R. Brown) J. R. Spence
|publications={{Treatment/Publication
|title=Phytologia
|place=87: 20. 2005
|year=2005
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Selected by author to be illustrated
}}
|basionyms={{Treatment/ID/Synonym
|name=Bryum calophyllum
|authority=R. Brown
}}
|synonyms={{Treatment/ID/Synonym
|name=B. axel-blyttii
|authority=H. Philibert
}}
|hierarchy=Bryaceae;Ptychostomum;Ptychostomum subg. Ptychostomum;Ptychostomum calophyllum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Bryaceae]]</div><div class="higher-taxon"><small>genus</small>[[Ptychostomum]]</div><div class="higher-taxon"><small>subgenus</small>[[Ptychostomum subg. Ptychostomum]]</div><div class="higher-taxon"><small>species</small>[[Ptychostomum calophyllum]]</div></div>
|volume=Volume 28
|mention_page=page 167, 168, 174
|treatment_page=page 169
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in dense or open turfs, green, yellow-green, or brown. <b>Stems</b> 1–3 cm, fertile stems comose, innovations evenly foliate. <b>Leaves</b> yellow-green to yellow-brown, somewhat distant, weakly contorted to somewhat imbricate when dry, broadly ovate, concave or sometimes flat, 0.5–2.5(–3) mm, enlarged toward stem apex; base red near costa, green otherwise, not decurrent; margins usually plane, limbidium moderately strong, in (1–)2–3 rows; apex obtuse to broadly acute; costa not reaching apex to percurrent, apiculus sometimes present, short, blunt; proximal laminal cells long-rectangular, (3–)4–5:1; medial cells somewhat longer, walls incrassate; distal cells 12–25 µm wide, 2–3:1, walls incrassate. <b>Specialized</b> asexual reproduction absent. <b>Sexual</b> condition autoicous. <b>Seta</b> red-brown, 2–4 cm, stout, straight to somewhat flexuose. <b>Capsule</b> yellow-brown, ovate, symmetric, 2–3 mm, mouth yellow to yellow-orange; hypophysis thick; operculum short-conic, apiculate; peristome reduced; exostome teeth red to red-brown or yellow-brown basally, hyaline distally, lamellae curved mid tooth, pores absent or rarely a few present at base of teeth; endostome not adherent to exostome, basal membrane less than 1/2 exostome height, segments with lanceolate to slitlike perforations, cilia absent or rudimentary. <b>Spores</b> with size often variable in same capsule, (28–)30–40 µm, yellow or brown.</span><!--

-->{{Treatment/Body
|phenology=Capsules mature Jul–Aug.
|habitat=Moist gravelly to sandy soil, near sea, along streams, around lakes
|elevation=low to moderate elevations (0-1000 m)
|distribution=Greenland;Nfld. and Labr. (Labr.);N.W.T.;Nunavut;Que.;Alaska;n Eurasia.
|discussion=<p><i>Ptychostomum calophyllum</i> is a distinctive species with a short, ovate capsule, ovate leaves with a blunt apex, and a strong limbidium. Sterile material from alpine regions of Colorado matches arctic material and may belong here. This is a variable species with several segregates synonymized under <i>P. calophyllum</i> by D. T. Holyoak (2004). Although part of the analysis by Holyoak is accepted here, <i>P. acutiforme</i> seems quite distinct and is therefore retained in this treatment. The three segregates reported from the flora area, based on the work of E. Nyholm (1986+, fasc. 3), are discussed below. The variation, ecology, and distribution of these species is poorly understood; capsules are needed for identification.</p><!--
--><p>Characters that segregate <i>Ptychostomum calophyllum</i> are short-ovate capsules yellow-brown to brown when mature, and neck thick. <i>Ptychostomum acutiforme</i> and P. axel-blyttii are distinguished by capsules red when mature, short-ovate, neck thick, or short-pyriform with neck slender. Of these, P. axel-blyttii has leaves of fertile stems broadly ovate, apices ± obtuse, concave, margins entire, and capsules short-pyriform, neck slender, while <i>P. acutiforme</i> has leaves of fertile stems ovate-lanceolate, apices acute, flat, margins denticulate, capsules short-ovate, and neck thick. <i>Ptychostomum</i> axel-blyttii is known only from Greenland.</p>
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|references=
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-->{{#Taxon:
name=Ptychostomum calophyllum
|author=
|authority=(R. Brown) J. R. Spence
|rank=species
|parent rank=subgenus
|synonyms=B. axel-blyttii
|basionyms=Bryum calophyllum
|family=Bryaceae
|phenology=Capsules mature Jul–Aug.
|habitat=Moist gravelly to sandy soil, near sea, along streams, around lakes
|elevation=low to moderate elevations (0-1000 m)
|distribution=Greenland;Nfld. and Labr. (Labr.);N.W.T.;Nunavut;Que.;Alaska;n Eurasia.
|reference=None
|publication title=Phytologia
|publication year=2005
|special status=Selected by author to be illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V28/V28_268.xml
|genus=Ptychostomum
|subgenus=Ptychostomum subg. Ptychostomum
|species=Ptychostomum calophyllum
}}<!--

-->[[Category:Treatment]][[Category:Ptychostomum subg. Ptychostomum]]