Gemmabryum tenuisetum

(Limpricht) J. R. Spence & H. P. Ramsay

Phytologia 87: 68. 2005.

Basionym: Bryum tenuisetum Limpricht Jahresber. Schles. Ges. Vaterl. Cult. 74(2): 4. 1897
Treatment appears in FNA Volume 28. Treatment on page 139. Mentioned on page 137.

Plants small, green or yellow-green, often with reddish tinge. Stems 0.4–1.5 (–2) cm; rhizoids yellow. Leaves imbricate to loosely set, ovatelanceolate to narrowly ovate, weakly concave, 0.4–1.5 (–2) mm; base not decurrent; margins revolute proximally, serrulate distally, limbidium absent; apex acute to acuminate; costa excurrent to long-excurrent, awn stout; alar cells similar to adjacent juxtacostal cells; proximal laminal cells gradually quadrate to short-rectangular, 1–2: 1; medial and distal cells 50–60 (–70) × 12–14 (–16) µm, 3–4: 1. Specialized asexual reproduction by rhizoidal tubers, on long rhizoids in soil, yellow or rarely orange, ± spheric, (100–) 120–180 (–200) µm, cells 25–40 µm, smooth. Sexual condition dioicous or rarely synoicous. Capsule inclined or nutant, 2–3 (–4) mm.


Phenology: Capsules mature Apr–Jun (spring–summer).
Habitat: Damp to drying acidic soil
Elevation: low to moderate elevations (0-600 m)

Distribution

V28 222-distribution-map.gif

B.C., N.B., N.S., Que., Calif., Maine, Mass., Nev., N.Y., Wash., Eurasia, Atlantic Islands (Tenerife), Australia

Discussion

Gemmabryum tenuisetum is characterized by relatively large, yellow tubers with red cell walls and yellow rhizoids. In the flora area, this species is possibly introduced.

Selected References

None.

Lower Taxa

None.

"narrower" is not a number."narrow" is not a number.

... more about "Gemmabryum tenuisetum"
acute;acuminate +
John R. Spence +
(Limpricht) J. R. Spence & H. P. Ramsay +
reduced +
curved +  and straight +
not decurrent +
Bryum tenuisetum +
cucullate +
not zygomorphic +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
nutant +  and inclined +
long-exserted +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
synoicous +, dioicous +  and sexual +
quadrate +
appendiculate +
excurrent +  and long-excurrent +
subpercurrent +
inflated +
hexagonal;rhomboidal +
B.C. +, N.B. +, N.S. +, Que. +, Calif. +, Maine +, Mass. +, Nev. +, N.Y. +, Wash. +, Eurasia +, Atlantic Islands (Tenerife) +  and Australia +
low to moderate elevations (0-600 m) +
hyaline;pale-yellow +
not adherent +
yellow +  and brown +
Damp to drying acidic soil +
inflated +  and tapered +
not +  and differentiated +
polyoicous +, monoicous +, dioicous +  and sexual +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
concave +, ovatelanceolate +  and narrowly ovate +
vegetative +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
multistratose +, 2-stratose +  and 1-stratose +
plane +  and strongly revolute +
1 (?) +, 3 (?) +  and 4 (?) +
rhomboidal +  and elongate-hexagonal +
synoicous +, dioicous +  and sexual +
short-rectangular +  and quadrate +
rostrate +, apiculate +, short-conic +  and long-convex +
lateral +  and terminal +
lateral +  and terminal +
diplolepidous-alternate +
Capsules mature Apr–Jun (spring–summer). +
gradually quadrate +  and short-rectangular +
differentiated +
smooth;papillose +
synoicous +, dioicous +  and sexual +
synoicous +, dioicous +  and sexual +
flexuose +  and straight +
not geniculate +
spheric +
light-brown +
germinating +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
gemmiform +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Gemmabryum tenuisetum +
Gemmabryum sect. Tuberibryum +
species +
acuminate;lanceolate +
distinct +
several +  and common +
straight +
specialized +
sinuate +
incrassate +
yellow-green +  and green +