Flora of North America species comparison

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Ptychomitrium gardneri

Gardner's ptychomitrium moss
Habit Plants robust, tufted, glossy, green to dark green.
Stems

erect or repent, to 5 cm.
Leaves

crispate-contorted when dry, narrowly acuminate, 4–6 mm;

margins coarsely serrate distally, recurved on one or both sides proximally;

apex plane or with erect margins but not cucullate.
Seta

1–2(–3) per perichaetium, 4–10 mm.
Capsule

cylindric, 2.5 mm, smooth to weakly striate-ribbed when dry;

peristome teeth divided into filiform segments, densely papillose.
Calyptra

lobes 1/2 or more length of calyptra.
Specialized

asexual reproduction absent.

Ptychomitrium gardneri
Phenology Capsules mature Mar–Sep.
Habitat Limestone, basalt, and other rocks, and concrete, rarely soil, logs, and charred wood, open sites, especially along rivers
Elevation low to moderate elevations (0-1400 m) (low to moderate elevations (0-4600 ft))
Distribution
from FNA
CA; ID; MT; OR; WA; BC; Asia
[WildflowerSearch map]
Discussion

Ptychomitrium gardneri are robust glossy plants easy to recognize by their green to dark green color, serrate, acuminate leaves, and narrow lobes of the deeply divided calyptra. The lobes of dry mature calyptrae often spread outward like the spokes of a wheel. The leaves are much longer and more narrowly acuminate than those of the somewhat similar P. serratum; the ranges of the latter and of P. gardneri do not overlap.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 27, p. 308.
Parent taxa Ptychomitriaceae > Ptychomitrium
Sibling taxa
P. drummondii, P. incurvum, P. serratum, P. sinense
Name authority Lesquereux: Mem. Calif. Acad. Sci. 1: 16. (1868)
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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