Leucodon brachypus

Bridel

Bryol. Univ. 2: 210. 1827.

Endemic
Synonyms: Fissidens sciuroides var. vaginans Michaux
Treatment appears in FNA Volume 28. Treatment on page 594. Mentioned on page 595.
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Plants medium-sized to large, dull. Stems elongate, loosely curved to straight and rigidly spreading, not julaceous, fragile branchlets absent from distal leaf-axils. Branch leaves erect-appressed to secund, plicate, 1.5–2.2 mm; apex acute to acuminate; apical laminal cells smooth abaxially; terminal cell isodiametric to elongate, concolorous to hyaline. Perigonia common. Perichaetia common. Capsule immersed to barely exserted, ovoid to pyriform, sometimes slightly asymmetric, to 2 mm. Spores 44–52 µm.


Phenology: Capsules mature Sep, Nov–Jul.
Habitat: Tree bark, logs, stumps, rock, upland and montane forests
Elevation: low to high elevations (0-2000 m)

Distribution

V28 932-distribution-map.gif

N.B., N.S., Ala., Ariz., Ark., Ga., Maine, N.H., N.Y., N.C., Ohio, Pa., S.C., Tenn., Tex., Vt., Va., W.Va., Wis.

Discussion

Leucodon brachypus is easily distinguished from L. julaceus by its longer, plicate leaves and usually immersed or emergent capsules. The species is less common and less widespread than L. julaceus and has a more northern range. The species is distinguished from L. andrewsianus by its terminal laminal cells 22–19 µm rather than 35–60 µm. The commonly present gametangia and sporophytes, absence of fragile axillary branchlets, and relatively short terminal cell on the leaf apices distinguish L. brachypus from the similar L. andrewsianus. In L. brachypus, gametangia, sporophytes, or both are commonly present. The ranges of L. brachypus and L. andrewsianus overlap, and the two species rarely grow intermixed. Leucodon brachypus occurs at sea level in the northern part of its range, but above 300–400 m only in the mountains to the south.

Selected References

None.

Lower Taxa

None.
... more about "Leucodon brachypus"
specialized +
acute +  and acuminate +
William D. Reese† +
Bridel +
slender +  and small +
dioicous +  and sexual +
not decurrent;rounded;not cordate +
in whorls +  and curved +
ascending +  and spreading +
concave +  and ovatelanceolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
cucullate +
ovoid +  and pyriform +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
quadrate +
differentiated +
N.B. +, N.S. +, Ala. +, Ariz. +, Ark. +, Ga. +, Maine +, N.H. +, N.Y. +, N.C. +, Ohio +, Pa. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +  and Wis. +
low to high elevations (0-2000 m) +
Tree bark, logs, stumps, rock, upland and montane forests +
papillose +  and smooth +
imbricate +  and crowded +
elongate +
differentiated +
serrulate +  and entire +
oblong-rhomboidal;linear +
oblique-rostrate +  and conic +
Capsules mature Sep, Nov–Jul. +
Bryol. Univ. +
papillose +
short;elongate +
ovate;ovatelanceolate +
simple +  and branched +
loosely curved +  and straight +
elongate +
Fissidens sciuroides var. vaginans +
Leucodon brachypus +
Leucodon +
species +
concolorous +  and hyaline +
medium-sized;large +