View source for Andreaea

{{Treatment/ID
|accepted_name=Andreaea
|accepted_authority=Hedwig
|publications={{Treatment/Publication
|title=Sp. Musc. Frond.,
|place=47. 1801 ,
}}
|basionyms=
|synonyms=
|hierarchy=Andreaeaceae;Andreaea
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Andreaeaceae]]</div><div class="higher-taxon"><small>genus</small>[[Andreaea]]</div></div>
|etymology=For J. G. R. Andreae, 1724–1793, apothecary of Hanover, Germany
|volume=Volume 27
|mention_page=page 3, 10, 11, 43, 103, 108, 109
|treatment_page=page 102
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>commonly cemented to substrate. <b>Stems</b> with stalked mucilage hairs in leaf axils, stalks usually brown. <b>Leaves</b> spiraling around stem in several rows, usually brittle, commonly ending in a distinct apiculus of a single cell; costa sometimes poorly differentiated, sometimes not reaching the leaf insertion; laminal cells with thick longitudinal walls and often pitted or sinuose, transverse walls thin. <b>Capsule</b> 0.5–2 mm.</span><!--

-->{{Treatment/Body
|distribution=Cosmopolitan.
|discussion=<p>Species about 45 (11 in the flora).</p><!--
--><p><i>Andreaea</i> is easily recognized in the field by the dark green to blackish dense turf strongly adherent to a rock habitat, the brittle leaves, and capsule opening by four longitudinal lateral slits. These species are largely temperate montane to arctic-alpine in distribution, not uncommon on exposed acid rock surfaces. The present treatment follows B. M. Murray’s (1987, 1988, 1988b) detailed and thorough study closely except that <i>Andreaea</i> alpestris is treated as a synonym of <i>A. rupestris</i> and A. crassinervia as a synonym of <i>A. rothii</i>, following M. F. V. Corley et al. (1981), while infraspecific taxa are not recognized. The costa may be interpreted as strongly excurrent when it fills the leaf subula.</p>
|tables=
|references={{Treatment/Reference
|id=motel1970a
|text=Schultze-Motel, W. 1970. Monographie der Laubmoosgattung Andreaea. 1. Die costaten Arten. Willdenowia 6: 25–110.
}}{{Treatment/Reference
|id=murray1988a
|text=Murray, B. M. 1988b. The genus Andreaea in Britain and Ireland. J. Bryol. 15: 17–82.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Costa absent, leaves mostly lanceolate to ovate or panduriform
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Costa present, leaves mostly subulate
|[[#key-0-6| > 6]]
|-id=key-0-2
|2
|Proximal laminal margins denticulate; Greenland.
|[[Andreaea alpina|Andreaea alpina]]
|-id=key-0-2
|2
|Proximal laminal margins entire (occasionally crenulate)
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Cells of basal laminal margins quadrate.
|[[Andreaea mutabilis|Andreaea mutabilis]]
|-id=key-0-3
|3
|Cells of basal laminal margins mostly rectangular
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Leaves narrowly lanceolate, medial cell walls pitted and sinuose.
|[[Andreaea sinuosa|Andreaea sinuosa]]
|-id=key-0-4
|4
|Leaves short-lanceolate to panduriform, medial cell walls variously pitted, straight
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Leaves generally curving or secund, short-lanceolate, widest proximally, apices oblique or symmetric
|[[Andreaea rupestris|Andreaea rupestris]]
|-id=key-0-5
|5
|Leaves mostly straight, panduriform, widest in distal half, apices usually symmetric
|[[Andreaea obovata|Andreaea obovata]]
|-id=key-0-6
|6
|Leaf margins crenulate to strongly denticulate, laminal papillae present, strong; perichaetial leaves little differentiated.
|[[Andreaea nivalis|Andreaea nivalis]]
|-id=key-0-6
|6
|Leaf margins entire or occasionally weakly crenulate, laminal papillae absent; perichaetial leaves differentiated, convolute-sheathing
|[[#key-0-7| > 7]]
|-id=key-0-7
|7
|Spores ca. 10-20 µm; basal laminal cells mostly rectangular, cell walls smooth and straight
|[[Andreaea blyttii|Andreaea blyttii]]
|-id=key-0-7
|7
|Spores 20-60 µm; basal laminal cells mostly rounded or quadrate to short-rectangular, walls commonly pitted and sinuose
|[[#key-0-8| > 8]]
|-id=key-0-8
|8
|Costa weak, flattened distally, commonly not reaching the leaf insertion.
|[[Andreaea heinemannii|Andreaea heinemannii]]
|-id=key-0-8
|8
|Costa moderately differentiated to strong, terete, reaching the leaf insertion
|[[#key-0-9| > 9]]
|-id=key-0-9
|9
|Spores usually 50-90 µm.
|[[Andreaea megistospora|Andreaea megistospora]]
|-id=key-0-9
|9
|Spores usually 35-60 µm
|[[#key-0-10| > 10]]
|-id=key-0-10
|10
|Spores usually 35-60 µm.
|[[Andreaea rothii|Andreaea rothii]]
|-id=key-0-10
|10
|Spores usually 20-30 µm.
|[[Andreaea schofieldiana|Andreaea schofieldiana]]
|}
</div></div><!--

-->{{#Taxon:
name=Andreaea
|author=
|authority=Hedwig
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Andreaeaceae
|distribution=Cosmopolitan.
|reference=motel1970a;murray1988a
|publication title=Sp. Musc. Frond.,
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V27/V27_110.xml
|genus=Andreaea
}}<!--

-->[[Category:Treatment]][[Category:Andreaeaceae]]