View source for Bucklandiella lawtoniae

{{Treatment/ID
|accepted_name=Bucklandiella lawtoniae
|accepted_authority=(Ireland) Bednarek-Ochyra & Ochyra in R. Ochyra et al.
|publications={{Treatment/Publication
|title=in R. Ochyra et al., Cens. Cat. Polish Mosses,
|place=145. 2003 (as lawtonae),
}}
|basionyms={{Treatment/ID/Basionym
|name=Racomitrium lawtoniae
|authority=Ireland
|rank=species
|publication_title=Bryologist
|publication_place=73: 707, figs. 1–12. 1971 (as lawtonae)
}}
|synonyms=
|hierarchy=Grimmiaceae;Grimmiaceae subfam. Racomitrioideae;Bucklandiella;Bucklandiella sect. Lawtonia;Bucklandiella lawtoniae
|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. Lawtonia]]</div><div class="higher-taxon"><small>species</small>[[Bucklandiella lawtoniae]]</div></div>
|volume=Volume 27
|mention_page=page 270, 284
|treatment_page=page 279
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>rather robust or less often moderately sized, loosely tufted, coarse and rigid, slightly glistening, yellow, yellow-green, olivaceous, sometimes grayish, in the upper part, brown proximally. <b>Stems</b> 5–10(–15) cm, curved-ascending to erect, simple or sparingly, irregularly branched. <b>Leaves</b> erect-appressed to falcate-secund when dry, erect-spreading when wet, straight or curved, sometimes almost circinate, (3.5–)4–5.5(–6) × (0.5–)0.6–0.8(–0.9) mm; margins broadly recurved on one side and more narrowly on the other side to 1/3–1/2(–3/4) of the leaf length, 1-stratose throughout or seldom with some bistratose patches distally; pilose, awns hyaline, not flexuose, erect-recurved to squarrose, 0.4–1.5(–2.6) mm, rarely almost absent, flattened, with a distinct cell areolation, remotely sharply denticulate at the margins, distinctly decurrent; costa percurrent, strongly convex abaxially, reniform in the median and proximal portions, 75–100(–115) µm wide basally, 40–50 µm wide distally, 3(–5)-stratose basally with (3–)4–5 enlarged adaxial cells, 2(–3)-stratose distally, with 2–3(–4) enlarged adaxial cells; laminal cells 1-stratose throughout, smooth; basal laminal cells elongate, 25–55 × 9–11 µm, with incrassate, sinuose-nodulose lateral walls; alar cells not or slightly differentiated, sometimes slightly yellowish; supra-alar cells hardly differentiated, not forming a distinct basal marginal border; medial and distal cells rectangular, 12–35 × 5–7 µm. <b>Inner</b> perichaetial leaves (2–3) broadly ovate, convolute, yellowish haline, shortly obtusely pointed or pilose, with thick-walled, chlorophyllose distal cells. <b>Seta</b> 4.5–7.5 mm, straight, brown, twisted clockwise. <b>Capsule</b> obloid to short-cylindric, (1.2–)1.5–2.5 × 0.6–0.8 mm; operculum rostrate, straight, 1–1.5 mm; peristome teeth 250–480 µm, brown, deeply cleft into to branches, strongly papillose, erect. <b>Spores</b> 12–17 µm, granulose.</span><!--

-->{{Treatment/Body
|habitat=Humid or wet, mostly shaded acidic rocks, boulders, cliffs and rock outcrops near streams and waterfalls
|elevation=low to moderate elevations (0-800 m)
|distribution=B.C.;Alaska;Wash.
|discussion=<p><i>Bucklandiella lawtoniae</i> occurs along the coastal region from Kodiak Island and southern Alaska southwards to the Cascade Range in central Washington, with a highly isolated site on Attu Island in the Aleutians. The largest species of the genus, it can be recognized by its characteristic, long and not flexuose, erect-recurved to squarrose, hyaline awns that are distinctly decurrent. Some elongate and pilose plants of <i>B. affinis</i> may imitate <i>B. lawtoniae</i> but that species, apart from a number of differences in structural characters including the hyaline innermost perichaetial leaves, has erect-flexuose awns and leaf margins recurved on both sides towards the apex. The same differences exist between <i>B. lawtoniae</i> and <i>B. heterosticha</i>, in which, additionally, the costa is usually broad, 2-stratose, and canaliculate in the middle and distal parts of the leaf. Additional diagnostic characters of <i>B. lawtoniae</i> are undifferentiated alar cells and the absence of both a basal marginal border and a basal membrane in the peristome. The species appears to be strongly isolated in the genus and on account of its peculiar innermost perichaetial leaves it is positioned in a separate section.</p>
|tables=
|references={{Treatment/Reference
|id=ireland1976a
|text=Ireland, R. R. 1976. Alar cells of Rhacomitrium lawtonae. Bryologist 79: 238–241.
}}
}}<!--

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-->{{#Taxon:
name=Bucklandiella lawtoniae
|authority=(Ireland) Bednarek-Ochyra & Ochyra in R. Ochyra et al.
|rank=species
|parent rank=section
|synonyms=
|basionyms=Racomitrium lawtoniae
|family=Grimmiaceae
|habitat=Humid or wet, mostly shaded acidic rocks, boulders, cliffs and rock outcrops near streams and waterfalls
|elevation=low to moderate elevations (0-800 m)
|distribution=B.C.;Alaska;Wash.
|reference=ireland1976a
|publication title=in R. Ochyra et al., Cens. Cat. Polish Mosses,
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V27/V27_383.xml
|subfamily=Grimmiaceae subfam. Racomitrioideae
|genus=Bucklandiella
|section=Bucklandiella sect. Lawtonia
|species=Bucklandiella lawtoniae
}}<!--

-->[[Category:Treatment]][[Category:Bucklandiella sect. Lawtonia]]