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Didymodon perobtusus Broth.
Life   Plantae   Bryophyta   Pottiaceae   Didymodon

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Didymodon perobtusus Broth.
didymodon moss

General Information
Symbol: DIPE8
Group: Moss
Family: Pottiaceae
Growth Habit : Nonvascular
Native Status : NA   N
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green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   




Symbol Scientific Name
BAPE7 Barbula perobtusa (Broth.) Chen


Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Division Bryophyta – Mosses
Subdivision Musci
Class Bryopsida – True mosses
Subclass Bryidae
Order Pottiales
Family Pottiaceae
Genus Didymodon Hedw. – didymodon moss
Species Didymodon perobtusus Broth. – didymodon moss

Subordinate Taxa

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Wetland Status

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Integrated Taxonomic Information System (DIPE8)



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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Following modified from Flora of North America
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FNA Vol. 27 Page 541, 542, 548, 549 , 550 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 27 | Pottiaceae | Didymodon

9. Didymodon perobtusus Brotherus, Rev. Bryol. 56: 1. 1928.

Barbula perobtusa (Brotherus) P. C. Chen

Plants usually green-, red- or dark brown. Stems to 0.6 cm, central strand present. Stem leaves appressed-incurved when dry, weakly spreading and not keeled when moist, monomorphic, ovate-lanceolate, broadly concave adaxially across leaf, usually 0.7-1.2 mm, base weakly differentiated in shape, ovate, margins weakly recurved at mid leaf, minutely crenulate, apex rounded-acute, often weakly cucullate; costa ending (2-)4-6 cells below the apex, not strongly spurred, little tapering, without an adaxial pad of cells, adaxial costal cells quadrate or short- to long-rectangular, 2 cells wide at mid leaf often grading to 4 proximally, guide cells in 1 layer; basal laminal cells differentiated medially, walls thin or thick, quadrate to rectangular, not perforated; distal laminal cells 9-11 wide, 1:1, papillae absent visible or low, simple, 1 over each lumen, lumens sub-quadrate to irregular, walls evenly thickened, weakly convex on both sides of lamina, 1-stratose. Specialized asexual reproduction by mostly unicellular gemmae in leaf axils. Sexual condition only perichaetial plants seen. Sporophytes unknown. Distal laminal KOH reaction red.

Calcareous rock or soil, bluffs, often near waterfalls; low to high elevations (100-3000 m); N.W.T., Yukon; e Asia.

Didymodon perobtusus is an extremely rare species known in the flora area from only two stations: Northwest Territories, Mackenzie District, Nahanni National Park, Virginia Falls, Scotter 22433 (NY); and Yukon, Firth River basin, near mouth of Mancha Creek, 68°40'N, 141°W, Sharp MC-58152a pro parte, 1958 (NY). It has several characters in common with D. revolutus of the southwestern United States and Mexico, including leaf and laminal papillae shape and unicellular gemmae borne in dense axillary clusters; however, D. revolutus differs by the strongly recurved to revolute margins, leaf cells with thin, light yellow walls, and gemmiferous plants uncommon, the propagula all unicellular. Both North American collections seen were from stations at which D. subandreaeoides is also present, growing in separate or occasionally confluent cushions. The taxonomic position of D. perobtusus is not clear. It is here placed near D. subandreaeoides because of dark, reddish color and similarity of areolation and laminal papillae. It may, however, turn out to be related to D. tophaceus , with which it has a certain resemblance.

Updated: 2019-01-17 09:35:41 gmt
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