Flora of North America species comparison

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Platygyrium fuscoluteum

platygyrium moss
Habit Plants relatively large, yellowish brown.
Stems

with branches elongate, creeping, loosely foliate, never julaceous, straight.
Leaves

homomallous, somewhat plicate, 1.3–1.6 mm;

margins conspicuously recurved proximally;

apex abruptly slenderly acuminate;

medial laminal cells 50–65 × 5–6 µm.
Seta

1–1.3 cm.
Capsule

cylindric, nearly symmetric to distinctly asymmetric, 2–2.5 mm;

operculum slenderly long-rostrate.
Calyptra

2–2.5 mm.
Spores

18 µm.
Specialized

asexual reproduction rare, by brood branchlets, inconspicuous on branch apices.

Platygyrium fuscoluteum
Phenology Capsules mature Feb.
Habitat Montane forests, old logs, stumps, tree trunks, damp boulders, rock faces, shaded banks
Elevation moderate to high elevations (1300-2800 m) (moderate to high elevations (4300-9200 ft))
Distribution
from FNA
AZ; NM; TX; Mexico
[WildflowerSearch map]
Discussion

Platygyrium fuscoluteum is distinguished by its glossy yellowish brown creeping plants bearing usually homomallous leaves with long slender apices on elongate branches. Microscopically, the often somewhat plicate leaves with recurved margins and quadrate alar cells make the species easy to recognize. Platygyrium fuscoluteum is not sympatric with P. repens. Brood branchlets are much less conspicuous and much less common than in P. repens, but can often be found by careful search; they are rather effectively concealed in leaf axils at the branch apices. Homomallium mexicanum often co-occurs with P. fuscoluteum and could be mistaken for it. However, the capsule of Homomallium mexicanum is curved and constricted below the mouth, and the leaves are imbricate (not homomallous), have erect margins, and are not plicate.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 28, p. 558.
Parent taxa Hypnaceae > Platygyrium
Sibling taxa
P. repens
Synonyms Regmatodon fuscoluteus
Name authority Cardot: Rev. Bryol. 37: 49. (1910)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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