Ptychostomum subneodamense

(Kindberg) J. R. Spence

Phytoneuron 2013-3: 1. 2013.

Illustrated
Basionym: Bryum subneodamense Kindberg Rev. Bryol. 32: 34. 1905
Synonyms: B. neodamense var. subneodamense (Kindberg) Podp ě ra
Treatment appears in FNA Volume 28. Treatment on page 165. Mentioned on page 156, 162, 171, 173.

Plants in dense or open turfs, olive green, red-green, or yellow-green. Stems 4–8 (–12) cm, tufted, comose, innovations elongate and evenly foliate; weakly radiculose. Leaves yellow-green to green, proximal leaves distinctly black-gray with age, distant, strongly twisted to contorted when dry, ovate, concave, (1–) 2–3 mm, not much enlarged toward stem apex; base narrow, weakly decurrent; margins revolute to mid leaf or beyond, limbidium strong, in 2 or 3 rows; apex broadly acute to obtuse; costa not reaching apex to percurrent, awn absent; proximal laminal cells 3: 1, same width or wider than more distal cells; medial and distal cells rhomboidal, 15–20 µm wide, 2–3: 1, walls thin. Specialized asexual reproduction absent. Sexual condition dioicous. Sporophytes unknown.


Habitat: Wet soil, bogs, wetlands
Elevation: low to moderate elevations (0-800 m)

Distribution

V28 264-distribution-map.gif

Greenland, Alta., N.W.T., Ont., Yukon, n Eurasia

Discussion

Ptychostomum subneodamense is a distinctive species that can only be confused with P. cyclophyllum and P. neodamense. Diagnostic characters include very distant, strongly shrunken leaves when dry, a rather narrow reddish leaf base, and 1-stratose border. When leaves are stripped off the stem, a long strip of the stem often remains attached to the leaf base. Ptychostomum cyclophyllum has broadly ovate to orbicular green leaves with very long proximal laminal cells, base not red, and 2-stratose margins; whereas P. neodamense has much more crowded leaves with a fairly broad attachment to the stem, but is otherwise similar.

Selected References

None.

Lower Taxa

None.

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

John R. Spence +
(Kindberg) J. R. Spence +
denticulate +
reduced +
curved +  and straight +
decurrent +
Bryum subneodamense +
cucullate +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
nutant +, inclined +  and suberect +
long-exserted +
obovate +, ovate +  and pyriform +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
inflated +
not differentiated +
appendiculate +
subpercurrent +
rhomboidal;hexagonal +
Greenland +, Alta. +, N.W.T. +, Ont. +, Yukon +  and n Eurasia +
low to moderate elevations (0-800 m) +
hyaline;pale-yellow +
hyaline +, brown +, orange +  and yellow +
Wet soil, bogs, wetlands +
not +  and differentiated +
narrowly ovatelanceolate;triangular +
polyoicous +, monoicous +, dioicous +  and sexual +
imbricate;variously contorted +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
yellow-green +  and green +
ovatelanceolate +  and ovate +
shrunken +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
2-stratose +  and 1-stratose +
revolute entire +  and denticulate +
1 (?) +, 2 (?) +  and 3 (?) +
short-rectangular +  and quadrate +
conic +  and low-convex rounded +
lateral +  and terminal +
lateral +  and terminal +
diplolepidous-alternate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Phytoneuron +
differentiated +
smooth;papillose +
not absent +
straight +  and flexuose +
elongate +
Illustrated +
black +, brown +, green +  and yellow +
germinating +
variable +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
B. neodamense var. subneodamense +
Ptychostomum subneodamense +
Ptychostomum subg. Cladodium +
species +
lanceolate +
distinct +
not +  and porose +
straight +
specialized +
dioicous +, sexual +  and asexual +
sinuate +
incrassate +
yellow-green +, red-green +  and olive green +
large;small to very +