Imbribryum gemmiparum

(De Notaris) J. R. Spence

Phytologia 89: 112. 2007.

Basionym: Bryum gemmiparum De Notaris Comment. Soc. Crittog. Ital. 2: 211. 1865
Treatment appears in FNA Volume 28. Treatment on page 144. Mentioned on page 143.

Plants medium-sized, bright green to yellow-green near tips, stramineous with age. Stems 1–2 (–3) cm, weakly julaceous, with or without metallic sheen, older stem sometimes densely brown radiculose. Leaves soft, loosely set, somewhat distant proximally, green, younger leaves sometimes yellowish, ovate, strongly concave, 1–3 mm; base weakly decurrent; margins plane throughout, rarely revolute proximally, entire, limbidium absent; apex rounded to acute, not cucullate; costa brown to yellowbrown, not reaching apex or percurrent, awn absent; basal row of pigmented cells absent; proximal laminal cells abruptly short-rectangular, occasionally with scattered quadrate cells, 2–3: 1; medial and distal cells hexagonal, (30–) 40–60 × (14–) 16–26 µm, 3 (–4):1, walls thin, parallel to costa. Specialized asexual reproduction rare, by rhizoidal tubers [leaf-axil bulbils], on rhizoids arising from leaf-axils, pink to orange, 100–200 µm. Seta ± straight, brown. Capsule inclined to nutant, brown, pyriform, 2–3 mm, neck short. Spores 12–18 µm, smooth to papillose, yellowish.


Phenology: Capsules mature spring–summer.
Habitat: Damp to wet calcareous soil, soil over rock, associated with springs
Elevation: low to high elevations (0-1800 m)

Distribution

V28 230-distribution-map.gif

Alta., B.C., Ont., Alaska, Ariz., Calif., Colo., Idaho, Maine, Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.J., N.Mex., N.Y., Okla., Oreg., Pa., S.Dak., Utah, Vt., Wash., Wyo., s Europe, Asia (Turkey), n Africa

Discussion

European plants of Imbribryum gemmiparum are reported to produce small, leafy bulbils in the leaf axils, but there is some controversy as these are also sometimes described as short innovations with stalks. Molecular studies show that at least some European material appears to be related to the Gemmabryum dichotomum complex. However, North American material is much larger in size and otherwise morphologically closest to other Imbribryum species. In eastern United States material, a short leaf apiculus is often present. Future studies may indicate that there are two species present, one in North America and the other in Europe and the Mediterranean. The plants are typically found in strongly calcareous springs; capsules are rare.

Selected References

None.

Lower Taxa

None.

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

... more about "Imbribryum gemmiparum"
not cucullate;rounded;acute +
John R. Spence +
(De Notaris) J. R. Spence +
reduced +
curved +  and straight +
decurrent +
Bryum gemmiparum +
cucullate +
inclined +  and nutant +
long-exserted +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
2 +  and 3 +
quadrate +
not differentiated +
appendiculate +
brown +  and yellowbrown +
subpercurrent +
hexagonal;rhomboidal +
Alta. +, B.C. +, Ont. +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.J. +, N.Mex. +, N.Y. +, Okla. +, Oreg. +, Pa. +, S.Dak. +, Utah +, Vt. +, Wash. +, Wyo. +, s Europe +, Asia (Turkey) +  and n Africa +
low to high elevations (0-1800 m) +
hyaline;pale-yellow +
not adherent +
Damp to wet calcareous soil, soil over rock, associated with springs +
not inflated +
not +  and differentiated +
polyoicous +, monoicous +, dioicous +  and sexual +
yellowish +  and green +
concave +  and ovate +
vegetative +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
multistratose +, 2-stratose +  and 1-stratose +
short-rectangular +  and quadrate +
lateral +  and terminal +
lateral +  and terminal +
diplolepidous-alternate +
Capsules mature spring–summer. +
differentiated +
smooth;papillose +
straight +
elongate +
germinating +
branching +  and foliate +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Imbribryum gemmiparum +
Imbribryum +
species +
lanceolate +
distinct +
straight +
specialized +
dioicous +  and sexual +
sinuate +
incrassate +
stramineous +, bright green +  and yellow-green +