Flora of North America species comparison

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Rhytidium rugosum

crumpled-leaf moss, rhytidium moss
Habit Plants to 10 cm, yellowish green to golden brown.
Stem(s)

leaves 2.8–4.5 × 0.8–1.5 mm;

alar cells many, 8–20 × 8–12 µm, region broad, triangular, along margin;

medial laminal cells 25–55 × 4–6 µm. Branch leaves 1.2–2.3 × 0.4–0.8 mm.
Seta

2–2.5 cm.
Capsule

2–2.5 mm.

Rhytidium rugosum
Phenology Capsules mature summer.
Habitat Rock, thin layer of soil or humus overlying rock, calcareous or mafic, exposed rock ledges, rocky slopes, bluffs, semi-open dry forests, in tundra, much less common on moist sites
Elevation low to high elevations (100-3900 m) (low to high elevations (300-12800 ft))
Distribution
from FNA
AK; AZ; CO; CT; IA; IL; IN; KY; MA; MD; ME; MI; MN; MO; MT; NC; NH; NJ; NM; NY; OH; OR; PA; SD; TN; TX; VA; VT; WI; WV; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; QC; SK; YT; Mexico; Eurasia; Greenland; South America (Bolivia); Central America (Guatemala); Africa (Kenya, Morocco, Uganda)
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Discussion

Though widespread, Rhytidium rugosum is infrequent, presumably because of a preference for exposed calcareous or mafic bedrock in a cool habitat. The plants are rarely found with sporophytes; perhaps almost total reliance on asexual reproduction explains the strong morphological uniformity seen among specimens of R. rugosum collected from across its broad range.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 28, p. 339.
Parent taxa Rhytidiaceae > Rhytidium
Synonyms Hypnum rugosum
Name authority (Hedwig) Kindberg: Bih. Kongl. Svenska Vetensk.-Akad. Handl. 7(9): 15. (1883)
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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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