Didymodon leskeoides

K. Saito

J. Hattori Bot. Lab. 39: 508, plate 51, figs. 1–12. 1975,.

Treatment appears in FNA Volume 27. Treatment on page 558. Mentioned on page 541, 545.

Plants green to redbrown. Stems to 2 (–6) cm, central strand present. Stem-leaves spreading-twisted and weakly catenulate when dry, spreading and keeled when moist, monomorphic, longlanceolate and often with a whiplike acumen, adaxially grooved along costa, 1–2.5 mm, base ovate and usually flaring at the insertion as small wings, margins broadly recurved to mid leaf, entire, apex narrowly acute to long-acuminate, not fragile; costa short-excurrent in a conic mucro, tapering, pad of cells absent, adaxial costal cells elongate, 2–4 cells wide at mid leaf, guide cells in 1 layer; basal laminal cells differentiated medially, rectangular, walls thin to thickened; distal laminal cells 7–10 µm wide, 1: 1, papillae usually absent, lumens angular or subquadrate, walls irregularly thickened, convex on both sides, 1-stratose. Specialized asexual reproduction absent: possibly through axillary buds. Sexual condition sterile in range of flora. Sporophytes unknown. Distal laminal KOH reaction red.


Habitat: Spray zone of falls, alpine tundra, damp cliff shelf
Elevation: moderate elevations

Distribution

V27 802-distribution-map.gif

B.C., N.W.T., Alaska, Asia (China), Asia (India), Asia (Japan)

Discussion

Didymodon leskeoides differs from D. rigidulus var. ditrichoides by the short and broadly decurrent leaf margins (the former has long and narrowly decurrent margins). It is easily distinguished from Hymenostylium recurvirostrum, with which it commonly occurs, by its usually olive or orange-brown tinge, as opposed to the green to yellow color of the latter. One collection (Northwest Territories: Scotter 22277, BUF) has unusually long stems, to 6 cm.

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 leskeoides"
whip-like +
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 +
not fragile +
Richard H. Zander +
K. Saito +
weak +  and strong +
ovate +  and crescent--shaped +
papillose +  and smooth +
usually slightly wider +
differentiated +
Pottiaceae tribe Barbuleae +
obovoid +
axillary +
cucullate +
stegocarpous +
monoicous +, dioicous +  and sexual +
flat to bulging +
thin;thick +
1 (?) +  and 10 (?) +
hexagonal +
tomentose +  and bare +
short-excurrent +
tapering +
quadrate +  and rectangular +
occasionally weakly dentate or crenulate +  and entire +
subquadrate;hexagonal or rounded-angular occasionally shortly rectangular or rhomboid +
B.C. +, N.W.T. +, Alaska +, Asia (China) +, Asia (India) +  and Asia (Japan) +
moderate elevations +
differentiated +
multicellular +
occasional +
Spray zone of falls, alpine tundra, damp cliff shelf +
yellow +  and orange-red or red +
grooved +, monomorphic +  and spreading-twisted +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
ovate +, keeled +  and curled +
reduced +
specialized +
dioicous +  and sexual +
subquadrate +  and angular +
short-conic;long-conic +
photosynthetic +
solid +  and simple +
lateral +  and terminal +
lateral +  and terminal +
twisted +, cleft +  and perforated +
red +, orange +  and yellow +
oblong +  and linear or long-triangular +
1 (?) +  and 2 (?) +
J. Hattori Bot. Lab. +
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 /> (2 cm20 mm <br />0.02 m <br />) +
Barbula sect. Acutae +, Barbula subsect. Acutiformes +, Barbula sect. Asteriscium +, Barbula sect. Fallaces +, Barbula subsect. Fallaciformes +, Barbula sect. Graciles +, Barbula sect. Rubiginosae +, Barbula sect. Vineales +, Barbula subsect. Vinealiformes +, Dactylhymenium +, Didymodon sect. Asteriscium +, Didymodon sect. Fallaces +, Didymodon sect. Graciles +, Didymodon sect. Vineales +, Geheebia +, Husnotiella +  and Trichostomopsis +
Didymodon leskeoides +
Didymodon +
species +
elliptic;cylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
rudimentary +
red +  and yellow +
thin +  and thickened +
stemless +  and perigoniate +