View source for Hilpertia

{{Treatment/ID
|accepted_name=Hilpertia
|accepted_authority=R. H. Zander
|publications={{Treatment/Publication
|title=Phytologia
|place=65: 427. 1989 ,
}}
|basionyms=
|synonyms=
|hierarchy=Pottiaceae;Pottiaceae subfam. Pottioideae;Hilpertia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pottiaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Pottiaceae subfam. Pottioideae]]</div><div class="higher-taxon"><small>genus</small>[[Hilpertia]]</div></div>
|etymology=For Friedrich Hilpert, b. 1907, German bryologist
|volume=Volume 27
|mention_page=page 265, 480, 608, 632
|treatment_page=page 631
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>in loose cushions, greenish brown distally, light brown proximally. <b>Stems</b> to 1 cm, hyalodermis absent, sclerodermis not or weakly differentiated, central strand distinct; axillary hairs to 8 cells long, all hyaline or the proximal one yellow-brown. <b>Stem</b> leaves crowded, larger distally, appressed and tightly spiraled when dry, weakly spreading when moist, 1–1.4 (plus 0.3–0.6 of awn) mm; ovate to circular, adaxial surface flat to quite concave, base not differentiated; distal margins strongly revolute (to 2 ×), entire or broadly dentate above, cells of revolute margin enlarged, strongly chlorophyllose; apex broadly acute, hyaline in an apical triangle; costa narrow but broader above, excurrent as a hyaline awn, lamina inserted laterally, adaxial outgrowths none, superficial adaxial cells long-rectangular, in 2–4 rows; transverse section rounded, adaxial epidermis present, adaxial stereid band absent, guide cells 2 in 1 layer, hydroid strand present, abaxial stereid band present, rounded in cross-sectional shape, abaxial epidermis absent; basal cells weakly differentiated, rectangular, thin-walled; distal medial cells hexagonal to short-rectangular or rhomboid, rather large, (14–)20–25 µm wide, 1–4:1; papillae absent medially, hollow-papillose on revolute margins, cell walls thin to thickened and porose, superficial abaxial cell walls thick, weakly convex superficially on both sides, cells of leaf apex rhomboid to fusiform, smooth. <b>Specialized</b> asexual reproduction by brood bodies borne on proximal rhizoids, brown, spheric to elliptic. <b>Sexual</b> condition polyoicous: synoicous, paroicous, autoicous or perigonia terminal on separate plants. <b>Perichaetia</b> terminal, interior leaves sheathing, usually differentiated, long-oval, margins usually somewhat differentiated, medial laminal cells rectangular, very thin-walled. <b>Seta</b> 0.35–0.4 cm. <b>Capsule</b> stegocarpous, theca elliptic, occasionally weakly ventricose, 1.2–1.5 mm, annulus of 3 rows of smaller, quadrate, highly vesiculose cells; operculum broadly short-conic to long-conic, peristome teeth 32, long, linear, twisted counterclockwise about 1/2 turn. <b>Calyptra</b> cucullate. <b>Spores</b> 13–16 µm. KOH laminal color reaction red.</span><!--

-->{{Treatment/Body
|distribution=Canada;Europe;Asia.
|discussion=<p>Species 1.</p><!--
--><p><i>Hilpertia</i> is unique among the Pottioideae in the elaboration of a photosynthetic organ consisting of laminal marginal cells rolled in a spiral tube, thin-walled and hollow-papillose. The species is characteristic of cold steppe habitats.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Hilpertia
|author=Richard H. Zander
|authority=R. H. Zander
|rank=genus
|parent rank=subfamily
|synonyms=
|basionyms=
|family=Pottiaceae
|distribution=Canada;Europe;Asia.
|reference=None
|publication title=Phytologia
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V27/V27_930.xml
|subfamily=Pottiaceae subfam. Pottioideae
|genus=Hilpertia
}}<!--

-->[[Category:Treatment]][[Category:Pottiaceae subfam. Pottioideae]]