Rosulabryum capillare

(Hedwig) J. R. Spence

Bryologist 99: 223. 1996.

Basionym: Bryum capillare Hedwig Sp. Musc. Frond., 182. 1801
Treatment appears in FNA Volume 28. Treatment on page 181. Mentioned on page 178, 179, 182, 183, 185.

Plants small, bright green. Stems 0.5–1.5 cm, distinctly singly rosulate, innovations short, rosulate. Leaves of main rosette and innovations similar, regularly spirally twisted around stem, erect-spreading when moist, obovate, weakly concave, 0.5–2.5 mm; base not decurrent; margins recurved to mid leaf, distinctly serrulate distally, limbidium present, of 1–3 rows of cells; apex acute; costa long-excurrent, awn sometimes hyaline, slender, irregularly twisted when dry; proximal laminal cells long-rectangular in rosette leaves; medial and distal cells short-rhomboidal, 12–25 µm wide, 3–4: 1, walls thin, not porose. Specialized asexual reproduction by rhizoidal tubers, usually on long rhizoids away from stem base, redbrown, same color as rhizoids, 200–300 µm, smooth or almost so. Sexual condition dioicous. Capsule inclined, redbrown, cylindric to elongate-pyriform, 3–5 mm.


Phenology: Capsules mature May–Jul.
Habitat: Moist shaded soil, soil banks, rotting wood
Elevation: low to high elevations (0-2500 m)

Distribution

V28 289-distribution-map.gif

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Sask., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., Idaho, Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.Dak., Ohio, Oreg., Pa., R.I., S.C., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Mexico, West Indies, Central America, South America, Eurasia, Africa, Atlantic Islands (including Macaronesia), Pacific Islands (New Zealand), Australia

Discussion

Traits diagnostic for the protean Rosulabryum capillare are leaves spirally twisted around the stem, long awn, distinct border, and serrulate margins, small size, rosulate innovations, and rhizoidal tubers the same color as the rhizoids. Rosulabryum gemmascens has irregularly contorted leaves with a much weaker border and nearly entire margins, and elongate somewhat imbricate innovations of small red-brown ovate leaves. Rosulabryum laevifilum has a much more variable costa that sometimes does not reach the apex, green leaves, and filiform gemmae. Rosulabryum torquescens has irregularly contorted leaves with strongly serrate margins and red to crimson tubers, brighter than the rhizoids, and is usually synoicous.

Selected References

None.

Lower Taxa

None.

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

... more about "Rosulabryum capillare"
entire to distinctly +
John R. Spence +
(Hedwig) J. R. Spence +
slender +
reduced +
curved +  and straight +
not decurrent +
Bryum capillare +
cucullate +
long-exserted +
cylindric +  and elongate-pyriform +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
quadrate +  and long-rectangular +
not differentiated +
appendiculate +
long-excurrent +
subpercurrent +
hexagonal;rhomboidal +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, Idaho +, Ind. +, Iowa +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.C. +, Tenn. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Mexico +, West Indies +, Central America +, South America +, Eurasia +, Africa +, Atlantic Islands (including Macaronesia) +, Pacific Islands (New Zealand) +  and Australia +
low to high elevations (0-2500 m) +
hyaline;pale-yellow +
not adherent +
Moist shaded soil, soil banks, rotting wood +
not differentiated +
polyoicous +, monoicous +, dioicous +  and sexual +
imbricate;variously contorted +
erect-spreading +
concave +  and obovate +
vegetative +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1 (?) +, 3 (?) +  and 4 (?) +
short-rectangular +  and quadrate +
short-conic +  and umbonate +
lateral +  and terminal +
lateral +  and terminal +
diplolepidous-alternate +
Capsules mature May–Jul. +
differentiated +
200um +  and 300um +
smooth;papillose +
straight +
elongate +
dark yellow +
germinating +
subjulaceous +  and foliate +
erect +  and erect-spreading +
concave +, flat +, spathulate +, obovate +  and ovate +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Bryum sect. Trichophora +
Rosulabryum capillare +
Rosulabryum +
species +
lanceolate;narrowly lanceolate +
distinct +
straight +
specialized +
dioicous +  and sexual +
sinuate +