Didymodon subandreaeoides

(Kindberg) R. H. Zander

Phytologia 41: 23. 1978,.

Basionym: Barbula subandreaeoides Kindberg Rev. Bryol. 32: 36. 1909
Synonyms: Barbula andreaeoides Kindberg
Treatment appears in FNA Volume 27. Treatment on page 550. Mentioned on page 110, 541, 549, 551.

Plants red or black-brown. Stems to 1 cm, central strand present or rarely absent. Leaves dimorphic: leaves on main-stems leaves appressed when dry, weakly spreading and not keeled when moist, ovate-triangular or ovatelanceolate to lanceolate, broadly concave adaxially across leaf, usually (0.3–) 0.5–0.6 (–0.8) mm, base scarcely differentiated in shape, margins plane to weakly recurved at mid leaf, minutely crenulate, apex rounded-obtuse to obtusely acute, seldom narrowly acute; costa ending 3–6 cells below the apex, not strongly spurred, not much widened or tapering, without an adaxial pad of cells, adaxial costal cells quadrate, 2 cells wide at mid leaf, guide cells in 1 layer; basal laminal cells weakly differentiated medially, walls thickened, shortrectangular, not perforated; distal laminal cells 9–12 wide, 1: 1, papillae low, simple or scablike, 1 over each lumen, rarely absent, lumens angular to ovate, walls evenly thickened, weakly convex on both sides of lamina, 1-stratose; leaves of branchlets oval to orbicular, strongly concave, cochleariform, about 0.2 mm, julaceous, distal laminal cells shortrectangular, 7–11 µm wide, 1–2: 1. Specialized asexual reproduction specialized structures absent. Sexual condition only perichaetial plants seen. Sporophytes unknown. Distal laminal KOH reaction red.


Habitat: Limestone outcrops, cliffs, bluffs, soil pockets in granite, tundra, along streams or associated with waterfalls
Elevation: moderate to high elevations (600-3500 m)

Distribution

V27 789-distribution-map.gif

Alta., B.C., N.W.T., Yukon, Alaska, Colo., Europe

Discussion

Recently, J. Kucera and H. Köckinger (2000) demonstrated that the widely distributed (Austria, France, Germany, Romania, Slovakia, Switzerland) Old World species Grimmia andreaeoides Limpricht is a synonym of Didymodon subandreaeoides, which is distributed along inland mountain ranges from the North Slope of Alaska south along the Cordillera into Colorado. It is commonly associated with Molendoa sendtneriana, with which it is often mixed in collections and which apparently has a similar distribution in northwestern North America. The fragile, cochleariform-leaved branchlets may possibly figure in asexual reproduction. Andreaea rothii when without sporophytes may be confused with D. subandreaeoides, but may be distinguished by the former’s autoicous inflorescence, the ecostate, oblong perichaetial leaves, leaves monomorphic, cauline leaves plane, cells with bulging but epapillose bright orange walls, 2-stratose along the distal margins, middle lamellae often evident between proximal cells, and costa not sharply distinguished from lamina beyond mid leaf.

Selected References

None.

Lower Taxa

None.

"um" is not declared as a valid unit of measurement for this property."um" is not declared as a valid unit of measurement for this property.

... more about "Didymodon subandreaeoides"
quadrate +  and elongate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
channeled +, concave +  and long-triangular +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Richard H. Zander +
(Kindberg) R. H. Zander +
weak +  and strong +
ovate +  and crescent--shaped +
papillose +  and smooth +
usually slightly wider +
differentiated +
differentiated +
Barbula subandreaeoides +
obovoid +
cucullate +
stegocarpous +
monoicous +, dioicous +  and sexual +
flat to bulging +
thin;thick +
3 (?) +  and 6 (?) +
hexagonal +
tomentose +  and bare +
tapering +
widened +
quadrate +  and rectangular +
occasionally weakly dentate or crenulate +  and entire +
subquadrate;hexagonal or rounded-angular occasionally shortly rectangular or rhomboid +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Colo. +  and Europe +
moderate to high elevations (600-3500 m) +
differentiated +
multicellular +
occasional +
Limestone outcrops, cliffs, bluffs, soil pockets in granite, tundra, along streams or associated with waterfalls +
yellow +  and orange-red or red +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
concave +, ovatelanceolate +  and lanceolate +
reduced +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
specialized +
dioicous +  and sexual +
angular +  and ovate +
dentate +  and entire +
crenulate +  and plane +
short-conic;long-conic +
photosynthetic +
lateral +  and terminal +
lateral +  and terminal +
twisted +, cleft +  and perforated +
red +, orange +  and yellow +
oblong +  and linear or long-triangular +
1 (?) +  and 2 (?) +
straight +
yellowish;reddish-brown +
elongate +
0.3 cm3 mm <br />0.003 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 +  and 1 +
yellow +, red-orange +, red +  and laminal +
rounded-triangular +  and rounded-pentagonal +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
sexual +, absent +  and asexual +
Barbula andreaeoides +
Didymodon subandreaeoides +
Didymodon +
species +
elliptic;cylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
rudimentary +
1-stratose +  and not perforated +
red +  and yellow +
stemless +  and perigoniate +