Rhytidiadelphus squarrosus

(Hedwig) Warnstorf

Krypt.-Fl. Brandenburg 2: 918. 1906.

Illustrated
Basionym: Hypnum squarrosum Hedwig Sp. Musc. Frond., 281. 1801
Treatment appears in FNA Volume 28. Treatment on page 334. Mentioned on page 34, 331.

Plants to 15 cm, soft. Stems 2–4 mm wide across leafy stem, remotely branched to irregularly pinnate, branches to 1.2 cm. Stem-leaves strongly squarrose-recurved, crowded (stem concealed by leaves), ovate, not plicate or rugose, 2.4–4.2 × 1.1–1.9 mm; base subsheathing, rounded to insertion; apex narrowed, acumen long, channeled; costa to 1/3 leaf length; alar cells distinct, shorter, wider than basal-cells, walls thin, not porose; medial laminal cells 45–80 × 5–7 µm, smooth. Branch leaves ovate to lanceolate, 1.2–2.3 × 0.4–0.9 mm. Capsule ovoid, 1.2–2.2 mm.


Habitat: Usually near coast on sand, open to partially shaded sites, soil, rock, grassy areas behind beach, salt marsh, sea shelf, headlands, open thickets, forests, grassy disturbed areas, lawns, pastures, golf courses
Elevation: low to moderate elevations (0-300 m)

Distribution

V28 519-distribution-map.gif

Greenland, B.C., Nfld. and Labr. (Nfld.), Alaska, Oreg., Wash., Eurasia, Atlantic Islands, Pacific Islands (New Zealand), Australia (Tasmania)

Discussion

Selected References

None.

Lower Taxa

None.

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

channeled +
narrowed +
Joseph R. Rohrer +
(Hedwig) Warnstorf +
decurrent +
Hypnum squarrosum +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
ovate;lanceolate +
0.4mm +  and 0.9mm +
attenuate +
0 cm0 mm <br />0 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
cucullate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
distinct +
elongate +
not differentiated +
dioicous +  and sexual +
Greenland +, B.C. +, Nfld. and Labr. (Nfld.) +, Alaska +, Oreg. +, Wash. +, Eurasia +, Atlantic Islands +, Pacific Islands (New Zealand) +  and Australia (Tasmania) +
low to moderate elevations (0-300 m) +
Usually near coast on sand, open to partially shaded sites, soil, rock, grassy areas behind beach, salt marsh, sea shelf, headlands, open thickets, forests, grassy disturbed areas, lawns, pastures, golf courses +
ascending-arching +
not +, crowded +  and falcate-secund +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.49 cm4.9 mm <br />0.0049 m <br />) +
squarrose-recurved;erect-spreading;squarrose +
ovatelanceolate +, ovate-triangular +  and ovate +
serrulate;serrulate;nearly entire +
Krypt.-Fl. Brandenburg +
elongate +
extensive +
Illustrated +
spheric +
2.4mm;4.2mm +
squarrose-recurved +
1.1mm;1.9mm +
leafy;remotely branched;irregularly pinnate +
creeping;ascending or erect +
2mm;4mm +
Hylocomiadelphus +
Rhytidiadelphus squarrosus +
Rhytidiadelphus +
species +