Didymodon vinealis

(Bridel) R. H. Zander

Phytologia 41: 25. 1978,.

Basionym: Barbula vinealis Bridel Bryol. Univ. 1: 830. 1827
Treatment appears in FNA Volume 27. Treatment on page 551. Mentioned on page 495, 526, 538, 542, 543, 544, 547, 552, 553, 554, 555, 557, 566, 568.

Plants green to dark green, usually with a reddish cast. Stems to 2 cm, central strand present. Stem-leaves often twisted, appressed to weakly spreading or spreading-flexuose when dry, spreading to spreading-recurved and not keeled when moist, monomorphic, lanceolate, grooved adaxially along the costa, especially near leaf apex, 0.8–2.5 (–4) mm, base scarcely differentiated to oblong in shape, margins recurved below mid leaf or to above mid leaf, entire, apex acute, not fragile, commonly ending in a conical cell; costa percurrent or more commonly short-excurrent, not strongly spurred, not much widened or tapering, lacking an adaxial pad of cells, adaxial costal cells quadrate to shortrectangular, ca. 4 cells wide at mid leaf, guide cells in 1 (–2) layers; basal laminal cells differentiated medially or across the leaf, walls thin to weakly thickened, rectangular or seldom quadrate, not perforated; distal laminal cells 7–10 µm wide, 1: 1, nearly smooth or papillae simple or 2-fid, 2–3 per lumen, lumens irregular or oval to roundedquadrate, walls thin or evenly thickened, convex on both sides of lamina, 1-stratose or occasionally 2-stratose in patches. Specialized asexual reproduction very rare, by multicellular gemmae in clusters in leaf-axils. Seta 0.8–1 cm. Capsule 1.5–2.5 mm; peristome teeth 32, linear, twisted 1/2 to once, to 1300 µm, occasionally rudimentary or absent. Spores 9–12 µm. Distal laminal KOH reaction light to dark redbrown, occasionally deep red-orange.

Distribution

V27 790-distribution-map.gif

North America, Mexico, Central America, South America, Eurasia, n Africa, Atlantic Islands (Iceland), Pacific Islands

Discussion

Varieties 2 (2 in the flora).

Didymodon vinealis is often difficult to distinguish from sterile forms of D. rigidulus, but the elongate cells commonly found on the adaxial surface of the costa near the boat-shaped leaf apex, the often strongly papillose laminal cells, and the usual presence of a distinct groove down the adaxial surface of the leaf along the costa are characteristic features. Some but not all specimens may be quickly assigned to this taxon by a unique deep slit floored by elongate cells on the adaxial surface of the costal apex (the adaxial epidermis being absent), visible as a clear window abaxially. Bryoerythrophyllum recurvirostrum is immediately distinguished by the clear, enlarged proximal cells. Like Bellibarbula recurva, small forms of D. vinealis may have quadrate or very short-rectangular proximal cells and sinuose costa, but the former has thick-walled proximal cells and the costa twists laterally, not vertically in the concave distal portion of the leaf of D. vinealis, and the adaxial cells of the costa of commonly elongate, 2:1 or more.

Selected References

None.

Key

1 Peristome present, well developed, cells of operculum twisted Didymodon vinealis var. vinealis
1 Peristome absent, cells of operculum straight or nearly so Didymodon vinealis var. rubiginosus

"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 vinealis"
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 +
(Bridel) R. H. Zander +
weak +  and strong +
ovate +  and crescent--shaped +
papillose +  and smooth +
across the leaf +  and differentiated +
usually slightly wider +
differentiated +
Barbula vinealis +
obovoid +
cucullate +
stegocarpous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
monoicous +, dioicous +  and sexual +
flat to bulging +
thin;thick +
1 (?) +  and 10 (?) +
conical +
tomentose +  and bare +
short-excurrent +  and percurrent +
tapering +
widened +
quadrate +  and rectangular +
occasionally weakly dentate or crenulate +  and entire +
subquadrate;hexagonal or rounded-angular occasionally shortly rectangular or rhomboid +
North America +, Mexico +, Central America +, South America +, Eurasia +, n Africa +, Atlantic Islands (Iceland) +  and Pacific Islands +
differentiated +
multicellular +
yellow +  and orange-red or red +
grooved +, monomorphic +  and twisted +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
spreading-flexuose +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
spreading +  and spreading-recurved +
lanceolate;keeled +
ovate +, keeled +  and curled +
reduced +
oval to roundedquadrate +  and irregular +
specialized +
dioicous +  and sexual +
occasionally trigonous +  and weakly strongly convex +
short-conic;long-conic +
photosynthetic +
2 +  and 3 +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
oblong +  and linear or long-triangular +
1 (?) +  and 2 (?) +
straight +
yellowish;reddish-brown +
elongate +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2 +  and 1 +
red-orange +, light +  and dark redbrown +
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 vinealis +
Didymodon +
species +
elliptic;cylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
rudimentary +
2-stratose +, 1-stratose +  and not perforated +
red +  and yellow +
specialized +
convex +, quadrate +  and rectangular +
thickened +, thin +  and weakly thickened +
stemless +  and perigoniate +