Rosulabryum gemmascens

(Kindberg) J. R. Spence

Novon 19: 399. 2009.

EndemicIllustrated
Basionym: Bryum gemmascens Kindberg Eur. N. Amer. Bryin. 2: 360. 1898
Synonyms: B. sanguilentum Renauld & Cardot B. trichophorum Kindberg
Treatment appears in FNA Volume 28. Treatment on page 183. Mentioned on page 179, 182.

Plants small, green, brown, or red-green. Stems 0.5–2 cm, distinctly singly rosulate, innovations elongate, evenly foliate. Leaves of fertile rosettes and innovations differentiated; rosette leaves irregularly twisted to contorted when dry, erect-spreading when moist, broadly ovate to obovate, flat, 1–2.5 mm; base not decurrent; margins recurved to mid leaf, entire or weakly serrulate distally, limbidium absent or weak, of 1 row of cells; apex acute; costa not reaching apex to excurrent, awn pigmented or hyaline, slender, irregularly twisted when dry; proximal laminal cells long-rectangular; medial and distal cells long-rhomboidal, 12–20 µm wide, 3–5: 1, walls thin, porose; innovation leaves redbrown, somewhat twisted to weakly imbricate when dry, broadly lanceolate to ovate, concave, 0.5–1.5 mm, awn present, short, pigmented to sometimes hyaline. Specialized asexual reproduction rarely by gemmae in distal leaf-axils, brown, finely papillose, and rhizoidal tubers, usually on long rhizoids away from stem base, orange-red to red, brighter than rhizoids, (60–) 100–200 µm, smooth or almost so. Sexual condition dioicous. Capsule inclined to nutant, brown to redbrown, cylindric, 2–5 mm.


Phenology: Capsules mature Apr–Jun.
Habitat: Exposed to shaded soil, soil over rock, rotting wood
Elevation: low to moderate elevations (0-1000 m)

Distribution

V28 293-distribution-map.gif

B.C., Calif., Oreg., Wash.

Discussion

Rosulabryum gemmascens is closely related to R. capillare, but differs in the unusual evenly foliate red-brown innovations, leaves not spirally twisted around the stem, very weak or absent limbidium, and almost entire distal margins. The species is endemic to coastal areas, and is especially common in Mediterranean climate areas of California.

Selected References

None.

Lower Taxa

None.

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... more about "Rosulabryum gemmascens"
entire to distinctly +
John R. Spence +
(Kindberg) J. R. Spence +
hyaline +, pigmented to sometimes +  and pigmented +
specialized +
dioicous +  and sexual +
slender +
reduced +
curved +  and straight +
not decurrent +
Bryum gemmascens +
cucullate +
brown +  and redbrown +
inclined +  and nutant +
long-exserted +
cylindric +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
quadrate +  and long-rectangular +
not differentiated +
appendiculate +
subpercurrent +
hexagonal;rhomboidal +
B.C. +, Calif. +, Oreg. +  and Wash. +
low to moderate elevations (0-1000 m) +
hyaline;pale-yellow +
not adherent +
Exposed to shaded soil, soil over rock, rotting wood +
not differentiated +
concave +, broadly lanceolate +  and ovate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
polyoicous +, monoicous +, dioicous +  and sexual +
imbricate;variously contorted +
erect;erect-spreading +
spathulate +, obovate +, ovatelanceolate +, ovate +  and lanceolate +
vegetative +
differentiated +
serrulate +  and entire +
short-rectangular +  and quadrate +
short-conic +  and umbonate +
lateral +  and terminal +
lateral +  and terminal +
diplolepidous-alternate +
Capsules mature Apr–Jun. +
differentiated +
smooth;papillose +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
straight +
elongate +
Endemic +  and Illustrated +
dark yellow +
germinating +
subjulaceous +  and foliate +
orange-red +  and red +
erect +  and erect-spreading +
concave +, flat +, spathulate +, obovate +  and ovate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
B. sanguilentum +  and B. trichophorum +
Rosulabryum gemmascens +
Rosulabryum +
species +
lanceolate;narrowly lanceolate +
distinct +
straight +
specialized +
autoicous +, polyoicous +, synoicous +, dioicous +  and sexual +
sinuate +
red-green +, brown +  and green +