Bryum calobryoides

J. R. Spence

Bryologist 89: 215, figs. 1–8. 1987.

Endemic
Treatment appears in FNA Volume 28. Treatment on page 127. Mentioned on page 125, 129.

Plants gregarious or in dense mats or cushions, brown proximally, bright green distally. Stems 0.5–1.5 (–2) cm, strongly rounded julaceous. Leaves erect when moist, ovate to suborbicular, concave, 0.2–1 (–1.2) mm; base green; margins weakly recurved proximally, plane distally; apex broadly rounded to acute, cucullate, not hyaline; costa not reaching apex to rarely percurrent, apiculus typically present in proximal leaves, absent in distal leaves, of more than 2 cells, sometimes hyaline; proximal laminal cells predominantly quadrate, 12–18 µm wide, 1–2: 1; distal cells irregularly rhomboidal, (25–) 30–75 × (8–) 12–25 µm, 1–4: 1, walls thin or somewhat thickened, not distinctly incrassate. Specialized asexual reproduction absent. Sporophytes unknown.


Habitat: Calcareous damp soil, rock
Elevation: moderate to high elevations (1000-3000 m)

Distribution

V28 197-distribution-map.gif

Alta., B.C., Que., Calif., Colo., Idaho, Mont., Oreg., Wash.

Discussion

Bryum calobryoides is easily distinguished by the small strongly julaceous stems, strongly concave leaves, and distal leaves broadly rounded and cucullate. An undescribed species from Colorado occurs in similar habitats but has a short-excurrent costa, acute leaf apices, and unusual, small, irregularly pyriform rhizoidal tubers with bulging cell walls. Collections previously identified as B. gerwigii (Müller Hal.) Limpricht from Alberta are B. calobryoides. Bryum gerwigii is a local waterfall form of Gemmabryum gemmiparum from central Europe.

Selected References

None.

Lower Taxa

None.

"narrower" is not a number."narrow" is not a number.

... more about "Bryum calobryoides"
not hyaline +
John R. Spence +
J. R. Spence +
reduced +
curved +  and straight +
not decurrent +
cucullate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
inclined +  and pendent +
long-exserted +
clavate +  and pyriform +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
quadrate +  and long-rectangular +
differentiated +
appendiculate +
subpercurrent +
Alta. +, B.C. +, Que. +, Calif. +, Colo. +, Idaho +, Mont. +, Oreg. +  and Wash. +
moderate to high elevations (1000-3000 m) +
hyaline;pale-yellow +
tan +  and pale-yellow +
Calcareous damp soil, rock +
not +  and differentiated +
polyoicous +, monoicous +, dioicous +  and sexual +
imbricate;variously contorted +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
concave +, ovate +  and suborbicular +
larger +  and vegetative +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
differentiated +
1 (?) +, 3 (?) +  and 6 (?) +
rarely +, short-rhomboidal +  and elongate-hexagonal +
short-rectangular +  and quadrate +
not rostrate +, short-conic +  and convex +
lateral +  and terminal +
lateral +  and terminal +
diplolepidous-alternate +
differentiated +
smooth;papillose +
differentiated +
elongate +
yellow-tan +  and pale tan +
germinating +
rounded +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Bryum calobryoides +
species +
lanceolate +
slender +
distinct +
straight +
specialized +
sinuate +
incrassate +
bright green +  and brown +
plant +, in dense mats or cushions +  and gregarious +