View source for Ditrichum ambiguum

{{Treatment/ID
|accepted_name=Ditrichum ambiguum
|accepted_authority=Best
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=20: 117. 1893,
}}
|basionyms=
|synonyms=
|hierarchy=Ditrichaceae;Ditrichum;Ditrichum ambiguum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Ditrichaceae]]</div><div class="higher-taxon"><small>genus</small>[[Ditrichum]]</div><div class="higher-taxon"><small>species</small>[[Ditrichum ambiguum]]</div></div>
|volume=Volume 27
|mention_page=page 456, 458
|treatment_page=page 451
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in loose to dense tufts, green to yellowish green, becoming yellowish brown with age, dull. <b>Stems</b> 0.7–2 cm, with a few reddish rhizoids at the base. <b>Leaves</b> erect-spreading, somewhat crisped when dry, 1.5–4.5 mm, lanceolate to linear-lanceolate, channelled, lamina with a few scattered 2-stratose cells midway between margins and costa in median to distal part of leaf; margins broadly recurved from the base to near mid lamina, weakly to strongly serrulate from mid lamina to apex, entire or serrulate at the somewhat blunt apex, 2-stratose distally and sometimes extending inward for several cells; costa distinct, percurrent, occupying 1/6–1/3 the width of the leaf base; lamina cells thick-walled, distal cells quadrate, irregularly subquadrate to short-rectangular, 8–24 × 4–8 µm, becoming broader and longer near the base. <b>Specialized</b> asexual reproduction unknown. <b>Sexual</b> condition dioicous. <b>Seta</b> red, 1–2 cm, erect. <b>Capsule</b> erect, usually straight and symmetric or sometimes slightly curved, dark brown or reddish, cylindric, 1.5–3(–3.2) mm, occasionally slightly enlarged at base; operculum rostrate, 0.4–0.8 mm; peristome red, 200–500(–800) µm, twisted when dry, teeth divided to near base into two equal filaments, strongly papillose to spiculose. <b>Spores</b> round, 6–13 µm, appearing smooth to minutely papillose.</span><!--

-->{{Treatment/Body
|phenology=Capsules mature spring and summer (Apr–Jul).
|habitat=Moist, sandy or sometimes clay banks, soil on upturned stumps, crevices of sandstone cliffs, often in clearings along roads
|elevation=low to moderate elevations (100-500 m)
|distribution=B.C. (including Queen Charlotte Island);Alaska;Calif.;Oreg.;Wash.;Central America (Guatemala;Panama).
|discussion=<p><i>Ditrichum ambiguum</i>, a western species, is very close to an eastern species, <i>D. tortuloides</i>, but differs in the following morphological characters: stems often branched and taller, 7–20 mm compared to the shorter, 2–5 mm, usually simple stems of <i>D. tortuloides</i>; leaf margins broadly recurved, entire or serrulate at a somewhat blunt apex, compared to the narrowly recurved, serrate to strongly serrate margins from mid-leaf to an acute apex in <i>D. tortuloides</i>; leaf laminae with 2-stratose margins and occasional 2-stratose regions between the margins and the costa in the middle to distal half of the leaf, compared to the 2-stratose regions only on the margins in <i>D. tortuloides</i>; capsules dark brown to reddish, 1.5–3.2 × 0.2–0.5 mm, straight and symmetric to rarely slightly arcuate with an occasionally slightly swollen base, compared to the yellow or light brown, 1–2.5 × 0.2–0.3 mm, curved and asymmetric capsules often with a swollen base in <i>D. tortuloides</i>. The geographic ranges of the two taxa are quite disparate. The species has been reported outside North America by B. H. Allen (1994), from Guatemala and Panama.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Ditrichum ambiguum
|authority=Best
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Ditrichaceae
|phenology=Capsules mature spring and summer (Apr–Jul).
|habitat=Moist, sandy or sometimes clay banks, soil on upturned stumps, crevices of sandstone cliffs, often in clearings along roads
|elevation=low to moderate elevations (100-500 m)
|distribution=B.C. (including Queen Charlotte Island);Alaska;Calif.;Oreg.;Wash.;Central America (Guatemala;Panama).
|reference=None
|publication title=Bull. Torrey Bot. Club
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V27/V27_651.xml
|genus=Ditrichum
|species=Ditrichum ambiguum
}}<!--

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