Difference between revisions of "Sphagnum sect. Polyclada"
J. Bot. 38: 119. 1900,.
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|name=Polyclada | |name=Polyclada | ||
|authority=C. E. O. Jensen | |authority=C. E. O. Jensen | ||
| + | |rank=unranked | ||
|publication_title=in Botaniske Forening København, Festskrift, | |publication_title=in Botaniske Forening København, Festskrift, | ||
|publication_place=82. 1890 | |publication_place=82. 1890 | ||
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|name=Pycnoclada | |name=Pycnoclada | ||
|authority=(Russow) H. Klinggräff | |authority=(Russow) H. Klinggräff | ||
| + | |rank=unranked | ||
}} | }} | ||
|hierarchy=Sphagnaceae;Sphagnum;Sphagnum sect. Polyclada | |hierarchy=Sphagnaceae;Sphagnum;Sphagnum sect. Polyclada | ||
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name=Sphagnum sect. Polyclada | name=Sphagnum sect. Polyclada | ||
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|authority=(C. E. O. Jensen) Horrell | |authority=(C. E. O. Jensen) Horrell | ||
|rank=section | |rank=section | ||
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|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V27/V27_79.xml |
|genus=Sphagnum | |genus=Sphagnum | ||
|section=Sphagnum sect. Polyclada | |section=Sphagnum sect. Polyclada | ||
Latest revision as of 21:28, 5 November 2020
Plants small to moderate-sized, with distinct capitulum; green, brown or variegated brown and red. Stems green to red-brown, superficial cortex of 2–4 layers of efibrillose, non-ornamented, enlarged, short-rectangular cells. Stem leaves smaller than branch leaves, triangular-lingulate, with rounded apex, border entire; hyaline cells efibrillose, non-ornamented, rhomboid, septate; resorbed on convex surface; concave surface intact except near apex. Branches dimorphic, spreading branches stiff; pendent branches slender and delicate. Branch fascicles with 3(–8) spreading and 3(–8) pendent branches. Branch stems with distinct solitary retort cells, necks not or slightly rostrate. Branch leaves ovate-lanceolate, apex involute, border entire; hyaline cells fibrillose and non-ornamented, convex surface with 4–6 small ringed ovate pores (approximately 1/4 the diameter of the cell), concave surface with 0–4 unringed pores per cell; chlorophyllous cells elliptic to truncate-elliptic in transverse section, qually exposed on both surfaces. Sexual condition monoicous or dioicous. Capsule with few pseudostomata. Spores 15–24 µm; finely papillose on both surfaces; proximal laesura less than 0.5 the length of the spore.
Distribution
North America, Eurasia.
Discussion
Species 1.
Selected References
None.