Schistidium subjulaceum

H. H. Blom

Bryophyt. Biblioth. 49: 161, fig. 61. 1996,.

Treatment appears in FNA Volume 27. Treatment on page 223. Mentioned on page 209, 210, 211, 222.

Plants in open to somewhat compact tufts, olivaceous, brownish, or nearly black. Stems 1.3–2 (–3) cm, central strand distinct. Leaves erect or curved, sometimes curved towards stem, imbricate, sometimes weakly spreading when dry, ovate-triangular to ovatelanceolate, keeled distally, 1.2–1.8 (–2.2) mm, 1-stratose, rarely with 2-stratose striae or patches distally; margins usually recurved to near apex, smooth or rarely weakly denticulate distally, 2-stratose, occasionally 3-stratose, often in more than one row; apices acute or somewhat rounded; costa subpercurrent, percurrent, or excurrent as a short, denticulate, slightly decurrent awn, abaxial surface occasionally weakly papillose; basal marginal cells quadrate or short-rectangular; distal laminal cells mostly isodiametric or ovate, occasionally short-rectangular, 9–13 µm wide, smooth, weakly sinuose, walls usually pale orange or yellowish. Sexual condition autoicous. Capsule light (yellow) brown, occasionally redbrown, short-cylindric or ovoid, usually narrowed towards the mouth, 0.8–1.4 (–1.7) mm; exothecial cells mostly irregularly angular, short-elongate or isodiametric, rarely oblate, walls thin or moderately and unevenly thickened, often somewhat curved, trigonous; stomata present; peristome patent to squarrose-recurved, often twisted, 300–450 µm, dull dark red or brown, densely papillose, usually entire, sometimes weakly perforated. Spores 11–18 µm, granulose or verruculose.


Phenology: Capsules mature late spring to early summer.
Habitat: Wet to dry rocks in or along water courses or in periodically wet sites such as in crevices or on ledges, rarely on rocks well away from wet areas
Elevation: moderate to high elevations (1000-1600 m)

Distribution

V27 307-distribution-map.gif

Alta., B.C., Man., Yukon, Eurasia

Discussion

Schistidium subjulaceum appears closely related to S. rivulare. Its smaller, more compact stature, and the consistently larger, often lighter colored capsules that are usually slightly narrowed towards the mouth separate it from S. rivulare.

Selected References

None.

Lower Taxa

None.

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

... more about "Schistidium subjulaceum"
deciduous +  and persistent +
rounded +  and acute +
multistratose +
Terry T. McIntosh +
H. H. Blom +
not papillose +
decurrent +  and denticulate +
sinuous +  and straight to sometimes +
rectangular +
short-rectangular +  and quadrate +
divided +
undifferentiated +
plicate +  and smooth +
not papillose +
mitrate +  and cucullate +
small;large +
sulcate +  and smooth +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
redbrown +  and light brown +
long-exserted +
striate +  and smooth +
narrowed;ovoid;short-cylindric +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
thin +  and thick +
excurrent;percurrent;excurrent;percurrent +
subpercurrent +
reniform +, elliptical +  and terete +
usually not markedly larger +
2-stratose +  and 1-stratose +
Alta. +, B.C. +, Man. +, Yukon +  and Eurasia +
moderate to high elevations (1000-1600 m) +
oblate +, isodiametric +, short-elongate +  and angular +
reproduction +  and asexual +
dioicous +, autoicous +  and sexual +
Wet to dry rocks in or along water courses or in periodically wet sites such as in crevices or on ledges, rarely on rocks well away from wet areas +
papillose +, mammillose +  and smooth +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
specialized +
dioicous +, autoicous +  and sexual +
spreading +  and erect +
keeled +, ovate-triangular +  and ovatelanceolate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
3-stratose;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 +  and twisted +
brown +, dark red +  and dull +
patent +  and squarrose-recurved +
lanceolate;linear +
Capsules mature late spring to early summer. +
Bryophyt. Biblioth. +
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 />) +
1.3 cm13 mm <br />0.013 m <br /> (2 cm20 mm <br />0.02 m <br />) +
muticous;long-awned +
Schistidium subjulaceum +
Schistidium +
species +
open to somewhat +
yellowish +  and pale orange +
autoicous +  and sexual +
trigonous +
moderately +  and thin +
4 cm40 mm <br />0.04 m <br /> (18 cm180 mm <br />0.18 m <br />) +
black;brownish;black;brownish;olivaceous +