Tortula amplexa

(Lesquereux) Steere in A. J. Grout

in A. J. Grout, Moss Fl. N. Amer. 1: 233. 1939,.

Basionyms: Barbula amplexa Lesquereux Trans. Amer. Philos. Soc., n. s. 13: 5. 1865
Synonyms: Syntrichia amplexa (Lesquereux) R. H. Zander
Treatment appears in FNA Volume 27. Treatment on page 602. Mentioned on page 587, 588, 590, 603.

Leaves ovate to elliptic, occasionally lingulate, apex rounded and muticuous, margins weakly recurved in proximal 1/2 of leaf, weakly bordered in distal 2/3 of leaf with 2–6 rows of thicker-walled, smaller cells (sometimes weak or patchy); costa percurrent or ending 2–6 cells before the apex, lacking an adaxial pad of cells, distally narrow, 2 (–3) cells across adaxial surface; distal laminal cells hexagonal, width 13–18 (–25) µm, 1: 1, weakly papillose. Sexual condition dioicous. Sporophytes exerted. Seta 0.5–1 (–1.5) cm. Capsule stegocarpic, not systylius, cylindric, erect and nearly straight, urn 1.5–2 mm; peristome of 32 twisted filaments, basal membrane low; operculum 1–1.5 mm. Spores 9–13 µm, spheric, essentially smooth.


Phenology: Capsules mature late summer.
Habitat: Soil, stones, near springs, dry washes, lowlands
Elevation: low elevations

Distribution

V27 867-distribution-map.gif

B.C., Man., Ariz., Calif., Wash., Europe (United Kingdom)

Discussion

Tortula amplexa is similar to T. inermis but the latter is autoicous and lacks the leaf border. The lax areolation, sheathing perichaetial leaves, and weak development of the laminal papillae distinguish it from the similar T. bolanderi. This species is thought to spread by rhizoidal propagula through inadvertent human agency (A. G. Side and H. L. K. Whitehouse 1974).

Selected References

None.

Lower Taxa

None.

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

... more about "Tortula amplexa"
smooth +  and papillose +
smooth +  and papillose +
2 +  and lacking +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
channeled +, nearly flat +  and concave +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Muticous (?) +  and Rounded (?) +
Richard H. Zander +  and Patricia M. Eckel +
(Lesquereux) Steere in A. J. Grout +
semicircular +  and elliptical +
semicircular +, elliptical +  and rounded +
papillose +  and smooth +
usually slightly wider +
usually ovate;oblong +
differentiated +
Barbula amplexa +
obovoid +
cucullate +
0.25 cm2.5 mm <br />0.0025 m <br /> (?) +  and 0.6 cm6 mm <br />0.006 m <br /> (?) +
not systylius +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
dark-brown +  and yellowish-brown +
cleistocarpous +  and stegocarpous +
cylindric +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
monoicous +, dioicous +  and sexual +
twisted +, vesiculose +  and thicker-walled +
1 (?) +  and 3 (?) +
elongate-rhomboid +  and elongate +
tomentose +  and bare +
ending 2-6 cells +  and percurrent +
subpercurrent +
dioicous +  and sexual +
B.C. +, Man. +, Ariz. +, Calif. +, Wash. +  and Europe (United Kingdom) +
low elevations +
differentiated +
multicellular +
Soil, stones, near springs, dry washes, lowlands +
somewhat larger +
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 +
lingulate +, ovate +  and elliptic +
reduced +
serrulate +  and entire +
smaller +
rostrate;long-conic +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
differentiated +
photosynthetic +
simple +  and hollow +
4 +  and 6 +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
consisting of 16 mostly 2 times cleft spiculose striate or papillose lanceolate teeth , , , , +  and rudimentary +
Capsules mature late summer. +
in A. J. Grout, Moss Fl. N. Amer. +
straight +
not twisted +  and twisted +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
brown;yellowish-brown +
elongate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2 +  and 1 +
orange +, red +, yellow +, laminal +  and light-brown +
spheric +
rounded-pentagonal +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Syntrichia amplexa +
Tortula amplexa +
species +
ovoid;cylindric +
rudimentary +
32 +  and 16 +
triangular +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
yellow distally and red +, orange +, red +  and yellow +
rectangular +
thickened +, thin +  and thicker +
stemless +  and perigoniate +
yellowbrown;dark-brown +
occasionally smaller than the perichaetiate +