Difference between revisions of "Syntrichia fragilis"
Fragm. Florist. Geobot. 37: 212. 1992,.
FNA>Volume Importer |
imported>Volume Importer |
||
| (6 intermediate revisions by 2 users not shown) | |||
| Line 6: | Line 6: | ||
|place=37: 212. 1992, | |place=37: 212. 1992, | ||
}} | }} | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Tortula fragilis | |name=Tortula fragilis | ||
|authority=Taylor | |authority=Taylor | ||
| + | |rank=species | ||
| + | |publication_title=London J. Bot. | ||
| + | |publication_place=6: 333. 1847 | ||
}} | }} | ||
|synonyms= | |synonyms= | ||
| Line 24: | Line 27: | ||
|elevation=low to high elevations | |elevation=low to high elevations | ||
|distribution=Ariz.;N.Mex.;N.C.;Okla.;Tenn.;Tex.;Va.;W.Va.;Mexico;Central America;South America;Europe;Asia (China;Iran);Pacific Islands (Hawaii). | |distribution=Ariz.;N.Mex.;N.C.;Okla.;Tenn.;Tex.;Va.;W.Va.;Mexico;Central America;South America;Europe;Asia (China;Iran);Pacific Islands (Hawaii). | ||
| − | |discussion=<p>Syntrichia fragilis shows considerable variability in size and leaf shape (apparently correlated with habitat conditions). In some small, corticolous plants, extreme fragmentation is evident, with an abnormal development of the lamina beyond the usual outline of the leaf. In such plants, several regions of each leaf seem to remain meristematic and produce scalloped or ruffled extensions that eventually break off. Fragility of leaves should not be considered an infallibly diagnostic character, however, since some plants of S. fragilis have quite firm leaves, and the leaves of some other species, particularly when old, may become broken.</p> | + | |discussion=<p><i>Syntrichia fragilis</i> shows considerable variability in size and leaf shape (apparently correlated with habitat conditions). In some small, corticolous plants, extreme fragmentation is evident, with an abnormal development of the lamina beyond the usual outline of the leaf. In such plants, several regions of each leaf seem to remain meristematic and produce scalloped or ruffled extensions that eventually break off. Fragility of leaves should not be considered an infallibly diagnostic character, however, since some plants of <i>S. fragilis</i> have quite firm leaves, and the leaves of some other species, particularly when old, may become broken.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 33: | Line 36: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Syntrichia fragilis | name=Syntrichia fragilis | ||
| − | |||
|authority=(Taylor) Ochyra | |authority=(Taylor) Ochyra | ||
|rank=species | |rank=species | ||
| Line 47: | Line 49: | ||
|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_910.xml |
|subfamily=Pottiaceae subfam. Pottioideae | |subfamily=Pottiaceae subfam. Pottioideae | ||
|genus=Syntrichia | |genus=Syntrichia | ||
Latest revision as of 21:29, 5 November 2020
Stems (5–)10–25 mm. Leaves crowded, longitudinally folded and spirally twisted around the stem (but little crisped) when dry, wide-spreading when moist, oblong-lingulate to spatulate, 2–3.5 × 0.75–1 mm, fragile, with sheets of cells breaking off, sometimes along lines of weakness; margins revolute before to as much as 1/2 the leaf length, to plane, entire or crenulate; apices truncate to acute; costa percurrent or slightly excurrent as a mucro 1–3(–5) cells long, yellow or red, finely to strongly papillose abaxially, abruptly tapered; basal cells abruptly differentiated, becoming rather abruptly short-rectangular near the margins; distal cells quadrate-hexagonal, 9–15 µm, bulging, with 3–8 papillae per cell, with moderately thick walls, not particularly collenchymatous; distal marginal cells not or weakly to strongly differentiated as a border of brownish, thicker-walled cells in about 2–3 rows. Specialized asexual reproduction absent. Sexual condition dioicous. Seta red, 10–15 mm. Capsule red, (1.5–)2–4 mm, slightly curved, rather gradually tapered to the seta or with a distinct neck; operculum 1–1.5 mm, red; peristome 1–1.5 mm, teeth twisted about 1/2 turn, the distal divisions yellow, the basal membrane pale, about 1/4 the total length. Spores 13–20 µm, densely papillose.
Habitat: Bark of trees, rock (usually calcareous), occasionally soil
Elevation: low to high elevations
Distribution
Ariz., N.Mex., N.C., Okla., Tenn., Tex., Va., W.Va., Mexico, Central America, South America, Europe, Asia (China, Iran), Pacific Islands (Hawaii).
Discussion
Syntrichia fragilis shows considerable variability in size and leaf shape (apparently correlated with habitat conditions). In some small, corticolous plants, extreme fragmentation is evident, with an abnormal development of the lamina beyond the usual outline of the leaf. In such plants, several regions of each leaf seem to remain meristematic and produce scalloped or ruffled extensions that eventually break off. Fragility of leaves should not be considered an infallibly diagnostic character, however, since some plants of S. fragilis have quite firm leaves, and the leaves of some other species, particularly when old, may become broken.
Selected References
None.