Difference between revisions of "Polytrichastrum papillatum"
J. Hattori Bot. Lab. 38: 633, figs. 12–24. 1974,.
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| − | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>slender, with the aspect of P. alpinum var. septentrionale. <b>Stems</b> to 2 cm, leafless below, leafy above. <b>Leaves</b> channeled and incurved when dry, spreading when moist, narrowly triangular, from a broadly elliptic, hyaline-margined sheathing base; marginal lamina serrate to almost entire; lamellae 5–6 cells high, crenate in profile, with each cell crowned by a papillose knob, the marginal cells in section pyriform. [Seta to 1.5 cm, curved. <b>Capsule</b> subspherical; exothecial cells with a distinct thin spot; peristome teeth ca. 40, hyaline, now and then compound.]</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>slender, with the aspect of <i>P. alpinum </i>var.<i> septentrionale</i>. <b>Stems</b> to 2 cm, leafless below, leafy above. <b>Leaves</b> channeled and incurved when dry, spreading when moist, narrowly triangular, from a broadly elliptic, hyaline-margined sheathing base; marginal lamina serrate to almost entire; lamellae 5–6 cells high, crenate in profile, with each cell crowned by a papillose knob, the marginal cells in section pyriform. [Seta to 1.5 cm, curved. <b>Capsule</b> subspherical; exothecial cells with a distinct thin spot; peristome teeth ca. 40, hyaline, now and then compound.]</span><!-- |
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|habitat=Substrate and elevation undetermined | |habitat=Substrate and elevation undetermined | ||
|distribution=Alaska;Asia (Kashmir;e Nepal). | |distribution=Alaska;Asia (Kashmir;e Nepal). | ||
| − | |discussion=<p>Polytrichastrum papillatum is known in North America from a single, sterile collection from southern Alaska (Valdez), collected by F. J. Hermann, but is possibly more widespread and overlooked. The marginal cells of the lamellae are coarsely papillose, and resemble those of P. alpinum in section. In profile, however, the lamellae are crenate, the marginal cells crowned by a papillose knob. The exothecial cells with a pale but distinct thin spot in the outer wall further distinguish this species from P. alpinum.</p> | + | |discussion=<p><i>Polytrichastrum papillatum</i> is known in North America from a single, sterile collection from southern Alaska (Valdez), collected by F. J. Hermann, but is possibly more widespread and overlooked. The marginal cells of the lamellae are coarsely papillose, and resemble those of <i>P. alpinum</i> in section. In profile, however, the lamellae are crenate, the marginal cells crowned by a papillose knob. The exothecial cells with a pale but distinct thin spot in the outer wall further distinguish this species from <i>P. alpinum</i>.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V27/V27_152.xml |
|genus=Polytrichastrum | |genus=Polytrichastrum | ||
|species=Polytrichastrum papillatum | |species=Polytrichastrum papillatum | ||
Revision as of 16:53, 18 September 2019
Plants slender, with the aspect of P. alpinum var. septentrionale. Stems to 2 cm, leafless below, leafy above. Leaves channeled and incurved when dry, spreading when moist, narrowly triangular, from a broadly elliptic, hyaline-margined sheathing base; marginal lamina serrate to almost entire; lamellae 5–6 cells high, crenate in profile, with each cell crowned by a papillose knob, the marginal cells in section pyriform. [Seta to 1.5 cm, curved. Capsule subspherical; exothecial cells with a distinct thin spot; peristome teeth ca. 40, hyaline, now and then compound.]
Habitat: Substrate and elevation undetermined
Distribution
Alaska, Asia (Kashmir, e Nepal).
Discussion
Polytrichastrum papillatum is known in North America from a single, sterile collection from southern Alaska (Valdez), collected by F. J. Hermann, but is possibly more widespread and overlooked. The marginal cells of the lamellae are coarsely papillose, and resemble those of P. alpinum in section. In profile, however, the lamellae are crenate, the marginal cells crowned by a papillose knob. The exothecial cells with a pale but distinct thin spot in the outer wall further distinguish this species from P. alpinum.
Selected References
None.