Rhytidiopsis robusta

(Hooker) Brotherus in H. G. A. Engler and K. Prantl

in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam. 232/233[I,3]: 1057. 1908.

EndemicIllustrated
Basionym: Hypnum robustum Hooker Musci Exot. 2: plate 108. 1819 (as Hypnunum on plate)
Treatment appears in FNA Volume 28. Treatment on page 336.

Plants to 12 cm. Stems hooked at apices. Stem-leaves 1.2–2.2 mm wide; alar cells shorter, wider than basal-cells, 18–38 × 12–25 µm; medial laminal cells 40–90 × 5–9 µm. Branch leaves 2.2–4 × 0.9–1.3 mm. Seta 1.7–3 cm. Capsule arcuate when dry, ellipsoid when moist, 2–3.4 mm.


Habitat: Soil, litter, and rock in montane coniferous forests of Pacific Northwest, occasionally extending into alpine tundra
Elevation: moderate to high elevations (300-2500 m)

Distribution

V28 523-distribution-map.gif

Alta., B.C., Alaska, Colo., Idaho, Mont., Oreg., Wash.

Discussion

Plants of Rhytidiopsis robusta in subalpine forest and alpine tundra are generally smaller, with leaves 2.5–3.5 mm and leafy stems 3–4 mm wide.

Selected References

None.

Lower Taxa

None.

"nearly" is not a number. "single" is not a number."broad" is not a number.

... more about "Rhytidiopsis robusta"
acuminate +
Joseph R. Rohrer +
(Hooker) Brotherus in H. G. A. Engler and K. Prantl +
2-seriate +  and 1-seriate +
not decurrent +
Hypnum robustum +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.9mm +  and 1.3mm +
attenuate +
cucullate +
ellipsoid +
0.2 cm2 mm <br />0.002 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
elongate +
differentiated +
12um +  and 25um +
dioicous +  and sexual +
Alta. +, B.C. +, Alaska +, Colo. +, Idaho +, Mont. +, Oreg. +  and Wash. +
moderate to high elevations (300-2500 m) +
Soil, litter, and rock in montane coniferous forests of Pacific Northwest, occasionally extending into alpine tundra +
ascending-arching +
crowded +  and falcate-secund +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
0.36 cm3.6 mm <br />0.0036 m <br /> (0.53 cm5.3 mm <br />0.0053 m <br />) +
erect;spreading +
ovate +  and lanceolate +
otherwise minutely toothed +  and entire +
in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam. +
elongate +
1.7 cm17 mm <br />0.017 m <br /> (3 cm30 mm <br />0.03 m <br />) +
extensive +
Endemic +  and Illustrated +
spheric +
very broadly ovate;lanceolate +
1.2mm;2.2mm +
leafy;branched;monopodial +
creeping;ascending +
5mm;8mm +
Rhytidiopsis robusta +
Rhytidiopsis +
species +