Schistidium strictum

(Turner) Loeske ex Mårtensson

Kungl. Svenska Vetenskapsakad. Avh. Naturskyddsärenden 14: 110. 1956,.

Basionym: Grimmia stricta Turner Muscol. Hibern. Spic., 20, plate 2, fig. 1. 1804
Treatment appears in FNA Volume 27. Treatment on page 223. Mentioned on page 208, 213.

Plants in open tufts or mats, usually rusty-redbrown, rarely black or olivaceous. Stems 1–5 (–11) cm, central strand absent or indistinct. Leaves erect or curved, usually imbricate below stem apex when dry, narrowly ovatelanceolate to ovatelanceolate, sharply keeled distally, 1.4–2.8 mm, 1-stratose, sometimes with 2-stratose patches distally; margins usually recurved to just before the apex, usually denticulate distally, 2-stratose or multistratose, sometimes 1-stratose; apices acute; costa percurrent or excurrent as a denticulate, occasionally decurrent, usually short awn, abaxial surface papillose; basal marginal cells quadrate or short-rectangular; distal laminal cells ovate or short-rectangular, 8–10 µm wide, papillose, sinuose. Sexual condition autoicous. Capsule dark redbrown, usually cupulate, 0.7–1.2 mm; exothecial cells mostly isodiametric, quadrate or irregularly angular, thin-walled or unevenly thick-walled; stomata present; peristome squarrose to revolute, twisted, red, 330–550 µm, papillose, entire or weakly perforated. Spores 10–15 µm, granulose or verruculose.


Phenology: Capsules mature late spring to early summer.
Habitat: Rock in open to shaded habitats
Elevation: low to moderate elevations (0-400 m)

Distribution

V27 306-distribution-map.gif

B.C., Alaska, Wash., Europe

Discussion

Although this species has been reported widely across North America, it appears to be restricted to the northwestern portions of the continent. See comments under 5. Schistidium boreale regarding differences among S. strictum and other North American species of the genus with papillose laminal cells.

Selected References

None.

Lower Taxa

None.

"um" is not declared as a valid unit of measurement for this property.

... more about "Schistidium strictum"
deciduous +  and persistent +
multistratose +
Terry T. McIntosh +
(Turner) Loeske ex Mårtensson +
not papillose +
decurrent +  and denticulate +
sinuous +  and straight to sometimes +
rectangular +
short-rectangular +  and quadrate +
divided +
Grimmia stricta +
undifferentiated +
plicate +  and smooth +
not papillose +
mitrate +  and cucullate +
small;large +
sulcate +  and smooth +
dark redbrown +
long-exserted +
striate +  and smooth +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
thin +  and thick +
excurrent;percurrent +
subpercurrent +
reniform +, elliptical +  and terete +
usually not markedly larger +
2-stratose +  and 1-stratose +
autoicous +  and sexual +
short-rectangular +  and ovate +
B.C. +, Alaska +, Wash. +  and Europe +
low to moderate elevations (0-400 m) +
thick-walled +  and thin-walled +
angular +, quadrate +  and isodiametric +
reproduction +  and asexual +
dioicous +, autoicous +  and sexual +
Rock in open to shaded habitats +
papillose +, mammillose +  and smooth +
specialized +
dioicous +, autoicous +  and sexual +
flat +, keeled +, , +, concave +, less commonly lanceolate +  and linear-lanceolate or elliptical +
1-stratose;multistratose;2-stratose +
denticulate +
thick-walled +  and sinuose +
papillose +  and smooth +
subtriangular +, ovate +, rectangular +  and quadrate +
thick-walled +  and sinuose +
papillose +  and smooth +
not +  and differentiated +
perforated +, entire +  and twisted +
lanceolate;linear +
Capsules mature late spring to early summer. +
Kungl. Svenska Vetenskapsakad. Avh. Naturskyddsärenden +
straight +
sigmoid +  and arcuate +
papillose +  and smooth +
short to long +
ornamented +  and smooth +
globose +
keeled;narrowly ovatelanceolate;ovatelanceolate +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
5 cm50 mm <br />0.05 m <br /> (11 cm110 mm <br />0.11 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
muticous;long-awned +
Schistidium strictum +
Schistidium +
species +
4 cm40 mm <br />0.04 m <br /> (18 cm180 mm <br />0.18 m <br />) +
olivaceous;black;rusty-redbrown +