Grimmia teretinervis

Limpricht

Jahresber. Schles. Ges. Vaterl. Cult. 61: 216. 1884,.

Synonyms: Schistidium teretinerve (Limpricht) Limpricht
Treatment appears in FNA Volume 27. Treatment on page 239. Mentioned on page 229, 238.

Plants in loose tufts, green-brown to reddish-brown, shiny. Stems 2–3 cm, central strand strong. Leaves ovate-cordate to lanceolate, 0.6–1.2 × 0.2–0.5 mm, keeled, not plicate, margins plane, awn to 0.3 mm, often just hyaline-tipped, commonly long-decurrent, costal transverse-section prominent, circular distally; basal juxtacostal laminal cells quadrate to short-rectangular, straight, thin to thick-walled; basal marginal laminal cells oblate to quadrate, straight, thick-walled, not hyaline; medial laminal cells roundedquadrate, thick-walled; distal laminal cells 2-stratose, bulging, marginal cells 2-stratose, bulging. Sexual condition dioicous, perichaetial leaves unknown. Seta unknown. Capsule unknown.


Habitat: Moist calcareous sandstone, limestone and dolomite outcrops
Elevation: moderate to high elevations (200-1700 m)

Distribution

V27 326-distribution-map.gif

Alta., B.C., N.W.T., Ont., Que., Sask., Yukon, Alaska, Ark., Colo., Minn., Mo., Mont., Nev., Okla., Wis., Europe

Discussion

As reported by R. R. Ireland (1982b), Grimmia teretinervis is widely scattered across North America, but nowhere is it common. R. I. Hastings (2002) added several more Western collection locations to those reported by Ireland. Based on field observations and by correlating collecting localities with bedrock geology, Hastings proposed that the distribution of G. teretinervis in North America is largely correlated with the boundaries of ancient epicontinental seaways. These deposits have subsequently undergone faulting or were subjected to glacial-fluvial erosion. The ancient oceans provided the calcareous sediments, and the faulting and erosion created the steep exposures preferred by G. teretinervis. Sporophytes have never been observed for this species and, until reported by Ireland, antheridial plants also were unknown. Despite the lack of sporophytes, this species is readily identified by its unique costal structure, which is circular in transverse section. It commonly has thick-walled, bulging laminal cells and very short awns that are none-the-less often long-decurrent. These features give the plants a blackish brown, shiny thread-like appearance.

Selected References

None.

Lower Taxa

None.
... more about "Grimmia teretinervis"
deciduous +  and persistent +
well-defined +
differentiated +
Roxanne I. Hastings +  and Henk C. Greven +
Limpricht +
hyaline-tipped +
only rarely longer +
not papillose +
long-decurrent +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
sinuous +  and straight to sometimes +
sinuose-nodulose;quadrate;elongate +
oblate;elongate +
divided +
Undefined subg. Guembelia +
undifferentiated +
plicate +  and smooth +
less +  and 1/2 +
not papillose +
mitrate +  and cucullate +
small;medium +
sulcate +  and smooth +
pendent +  and erect +
striate +  and smooth +
rarely ventricose ovoid;obloid rarely globose or cylindric +
thin +  and thick +
thick-walled +  and thin-walled +
quadrate +  and rectangular +
excurrent;percurrent;excurrent +
subpercurrent +
reniform +, elliptical +  and terete +
usually not markedly larger +
with at-least several marginal rows +  and 2-stratose +
Alta. +, B.C. +, N.W.T. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Ark. +, Colo. +, Minn. +, Mo. +, Mont. +, Nev. +, Okla. +, Wis. +  and Europe +
moderate to high elevations (200-1700 m) +
reproduction +  and asexual +
dioicous +, autoicous +  and sexual +
Moist calcareous sandstone, limestone and dolomite outcrops +
papillose +, mammillose +  and smooth +
specialized +
dioicous +, autoicous +  and sexual +
0.6mm;1.2mm +
keeled +, ovate-cordate +  and lanceolate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
1;multistratose +
incurved +  and recurved +
thick-walled +  and sinuose +
thick-walled +  and sinuose +
rostrate;conic;rostrate;conic;mammillate +
not +  and enlarged +
not +  and differentiated +
lanceolate;linear +
Jahresber. Schles. Ges. Vaterl. Cult. +
straight +
sigmoid +  and arcuate +
papillose +  and smooth +
short to long +
ornamented +  and smooth +
globose +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
muticous;long-awned +
Schistidium teretinerve +
Grimmia teretinervis +
Grimmia subg. Guembelia +
species +
green-brown;reddish-brown +