Schistidium cryptocarpum

Mogensen & H. H. Blom

Lindbergia 15: 75, figs. 1, 2. 1990,.

Treatment appears in FNA Volume 27. Treatment on page 215. Mentioned on page 209, 216.

Plants in cushions or low, sometimes extensive tufts, olivaceous or yellowish-brown. Stems 0.8–2.5 cm, central strand distinct. Leaves erect or curved, rarely falcate, imbricate when dry, lanceolate to ovatelanceolate, strongly keeled distally, (0.9–) 1.4–2 (–2.3) mm, 1-stratose; margins usually recurved to just before the apex, proximally often more broadly recurved on one side of leaf, distal 1/3 often plane, smooth, 1-stratose with 2-stratose sections; apices acute or subobtuse; costa excurrent as a denticulate, flexuose, usually strongly decurrent awn, often embracing part of the lamina, smooth; basal marginal cells short-rectangular, occasionally with transverse walls thicker than longitudinal walls; distal cells mainly short-rectangular or quadrate, 7–10 (–11.5) µm wide, smooth, usually strongly sinuose. Sexual condition autoicous. Capsule orangebrown or reddish-brown, campanulate, 0.5–0.6 mm; exothecial cells short-elongate or isodiametric, often more or less quadrate, thin-walled or slightly thickened, small trigones usually present; stomata present; operculum rostrate; peristome rudimentary, consisting of basal segments, or absent, yellowish, papillose. Spores 8–12 µm, verruculose.


Phenology: Capsules mature late spring to early summer.
Habitat: Shallow crevices and cavities on basalt cliffs
Elevation: low to moderate elevations (60-1200 m)

Distribution

V27 290-distribution-map.gif

Greenland, N.W.T., Que., Alaska.

Discussion

The long, usually strongly decurrent awns and the campanulate capsules absent a distinct peristome separate Schistidium cryptocarpum from other arctic species of the geunus. Mogensen and Blom provided further details on this species. It should be confused only with S. flaccidum, a more southern species, which differs in having a mamillate rostrum and a cupulate capsule.

Selected References

None.

Lower Taxa

None.
... more about "Schistidium cryptocarpum"
deciduous +  and persistent +
subobtuse +  and acute +
multistratose +
Terry T. McIntosh +
Mogensen & H. H. Blom +
flexuose +
not papillose +
decurrent +  and denticulate +
sinuous +  and straight to sometimes +
rectangular +
short-rectangular +
divided +
undifferentiated +
plicate +  and smooth +
not papillose +
mitrate +  and cucullate +
small;large +
sulcate +  and smooth +
reddish-brown +  and orangebrown +
long-exserted +
striate +  and smooth +
campanulate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
thin +  and thick +
excurrent;percurrent;excurrent +
subpercurrent +
reniform +, elliptical +  and terete +
usually not markedly larger +
autoicous +  and sexual +
quadrate +  and short-rectangular +
2-stratose +  and 1-stratose +
Greenland +, N.W.T. +, Que. +  and Alaska. +
low to moderate elevations (60-1200 m) +
quadrate +, isodiametric +  and short-elongate +
reproduction +  and asexual +
dioicous +, autoicous +  and sexual +
Shallow crevices and cavities on basalt cliffs +
papillose +, mammillose +  and smooth +
0.2 cm2 mm <br />0.002 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
specialized +
dioicous +, autoicous +  and sexual +
keeled +, lanceolate +  and ovatelanceolate +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
thick-walled +  and sinuose +
papillose +  and smooth +
subtriangular +, ovate +, rectangular +  and quadrate +
thick-walled +  and sinuose +
papillose +  and smooth +
not +  and differentiated +
lanceolate;linear +
Capsules mature late spring to early summer. +
straight +
sigmoid +  and arcuate +
papillose +  and smooth +
short to long +
ornamented +  and smooth +
globose +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
muticous;long-awned +
Schistidium cryptocarpum +
Schistidium +
species +
extensive +
longitudinal +  and transverse +
thicker +
4 cm40 mm <br />0.04 m <br /> (18 cm180 mm <br />0.18 m <br />) +
yellowish-brown;olivaceous +