Pohlia brevinervis

Lindberg & Arnell

Kongl. Svenska Vetensk. Akad. Handl., n. s. 23(10): 51. 1890.

Treatment appears in FNA Volume 28. Treatment on page 209. Mentioned on page 196.

Plants very small to small, whitish, somewhat glossy. Stems 0.3–1.5 cm. Leaves erect-spreading, lanceolate, 0.6–1.4 mm; base not or scarcely decurrent; margins serrulate in distal 1/3; costa subpercurrent; distal medial laminal cells linear-rhomboidal, 60–110 × 6–9 µm, walls thin. Specialized asexual reproduction absent. Sexual condition dioicous; perigonial leaves to 3 mm; perichaetial leaves weakly differentiated, lanceolate. Seta orangebrown. Capsule inclined ± 180°, brown to stramineous, short-pyriform to urceolate, neck less than 1/3 urn length; exothecial cells isodiametric, walls sinuate; stomata superficial or slightly immersed; annulus absent; operculum short to long-conic; exostome teeth dark to light-brown or redbrown, triangular-acute; endostome light yellow, basal membrane 1/2 exostome length or slightly longer, segments tapered apically, distinctly keeled, broadly perforate, cilia long, nodulose. Spores 16–21 µm, finely roughened.


Phenology: Capsules mature spring (Apr–Jun).
Habitat: Clay soil along streams, ditches, glacial outwash
Elevation: low to high elevations

Distribution

V28 336-distribution-map.gif

Alta., Yukon, Alaska, Asia (e Siberia)

Discussion

Pohlia brevinervis is a rare and poorly known species that seems to combine characters of P. vexans (erect, glossy leaves on sterile plants) and P. atropurpurea (dark, reddish brown exostome teeth and somewhat immersed stomata). The leaves are distinctly more whitish than those of P. vexans. The exothecial cell walls of capsules of this species are somewhat collenchymatous.

Selected References

None.

Lower Taxa

None.

"narrow" is not a number.

... more about "Pohlia brevinervis"
erect;widespreading +
A. Jonathan Shaw +
Lindberg & Arnell +
reduced +
brown;reddish +
decurrent +
cucullate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
brown;stramineous +
long-exserted +
short-pyriform;urceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
nodulose +
short-excurrent +  and percurrent +
subpercurrent +
linear-rhomboidal +, rhombic +  and elongate-hexagonal +
Alta. +, Yukon +, Alaska +  and Asia (e Siberia) +
low to high elevations +
dark reddish-brown +, pale-yellow +  and brown +
dark;light-brown or redbrown +
triangular-acute +
Clay soil along streams, ditches, glacial outwash +
erect-spreading +
lanceolate +
vegetative +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
not differentiated +
slightly narrower and longer +
undifferentiated +
autoicous +, paroicous +, dioicous +  and sexual +
short-rectangular +  and quadrate +
1+ times urn length +
0 +  and 1/3 +
differentiated +
long-conic +
lateral +  and terminal +
lateral +  and terminal +
diplolepidous-alternate +
Capsules mature spring (Apr–Jun). +
Kongl. Svenska Vetensk. Akad. Handl., n. s. +
smooth;papillose +
spheric;ovoid +
keeled +  and tapered +
orangebrown +
straight +
darker +, hyaline +, tan +  and pale-yellow +
not complanate-foliate +
short to long +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
superficial +
Pohlia brevinervis +
species +
not +  and trabeculate +
papillose +  and pitted +
triangular;lanceolate +
reduced +
multicellular +
spheric;ovoid +
extensive +
collenchymatous +
straight +
specialized +
dioicous +, sexual +  and asexual +
sinuate +