Difference between revisions of "Platydictya minutissima"
Bryologist 72: 244. 1969.
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|name=Hypnum minutissimum | |name=Hypnum minutissimum | ||
|authority=Sullivant & Lesquereux | |authority=Sullivant & Lesquereux | ||
| + | |rank=species | ||
|publication_title=in A. Gray, Manual ed. | |publication_title=in A. Gray, Manual ed. | ||
|publication_place=2, 678. 1856 | |publication_place=2, 678. 1856 | ||
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|name=Amblystegiella minutissima | |name=Amblystegiella minutissima | ||
|authority=(Sullivant) Nichols | |authority=(Sullivant) Nichols | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Platydictya jungermannioides var. minutissima | |name=Platydictya jungermannioides var. minutissima | ||
|authority=(Sullivant) H. A. Crum | |authority=(Sullivant) H. A. Crum | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Amblystegiaceae;Platydictya;Platydictya minutissima | |hierarchy=Amblystegiaceae;Platydictya;Platydictya minutissima | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Platydictya minutissima | name=Platydictya minutissima | ||
| − | |||
|authority=(Sullivant & Lesquereux) H. A. Crum | |authority=(Sullivant & Lesquereux) H. A. Crum | ||
|rank=species | |rank=species | ||
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|publication year=1969 | |publication year=1969 | ||
|special status=Endemic | |special status=Endemic | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V28/V28_443.xml |
|genus=Platydictya | |genus=Platydictya | ||
|species=Platydictya minutissima | |species=Platydictya minutissima | ||
Latest revision as of 21:35, 5 November 2020
Plants thin, ± silky, green to brownish. Stems with branching angle wide, branches firmly attached; pseudoparaphyllia apparently absent; rhizoids below or at abaxial leaf insertion, red-brown, smooth. Leaves loosely spreading, 0.1–0.3 mm; base not narrowed to insertion; margins entire at insertion, serrulate elsewhere; alar cells scarcely differentiated; distal laminal cells elongate-rhomboidal, 3–6:1. Specialized asexual reproduction absent. Sexual condition autoicous; perichaetial leaf margins coarsely dentate distally. Seta 0.4–0.9 cm. Capsule inclined, horizontal, or sometimes suberect, broadly oblong-ovoid, asymmetric, 0.4–0.5 mm, not contracted below mouth when dry, neck absent; stomata absent; annulus 1-seriate; operculum convex-conic, stoutly apiculate; exostome teeth yellowish; endostome cilia 1 or 2, well developed. Spores 8–13 µm.
Habitat: Moist, shaded rock (limestone, sandstone)
Elevation: low to moderate elevations
Distribution
Que., Ark., Ind., Mass., N.J., N.Y., Ohio, Pa., Wis.
Discussion
Platydictya minutissima is rare and occurs in thin, rather silky mats. The leaves are somewhat remote, loosely spreading when dry, and serrulate except near the insertion; the laminal cells are elongate, and those in the alar regions are scarcely differentiated.
Selected References
None.