Barbula amplexifolia

(Mitten) A. Jaeger

Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1871–1872: 424. 1873,

Basionyms: Tortula amplexifolia Mitten J. Proc. Linn. Soc., Bot., suppl. 1: 29. 1859
Synonyms: Barbula coreensis (Cardot) K. Saito Barbula haringae H. A. Crum
Treatment appears in FNA Volume 27. Treatment on page 533. Mentioned on page 529, 534.
Stems to 1 cm. Leaves firm when wet, short-lanceolate to lanceolate, 1.1–1.5 mm, base long-oblong to elliptic and sheathing, margins plane or rarely recurved at mid leaf, apex acute, strongly mucronate; costa short-excurrent, abaxial costal surface smooth or occasionally doubly prorate, rarely simply papillose near apex, hydroids absent; distal laminal cells firm-walled, quadrate, 7–10 µm wide, 1:1, papillose. Specialized asexual reproduction by clusters of red-brown ovoid gemmae borne on stalks in leaf axils, 40–100(–150) µm long. Sporophytes absent in range of the flora.

Habitat: Rock, often limestone, occasionally sandstone, usually in moist areas, mountain slopes, cliffs, tundra, mist zone of waterfalls
Elevation: moderate to high elevations (700-1800 m)


V27 768-distribution-map.gif

Greenland, Alta., B.C., N.W.T., Alaska, Ariz., Calif., Asia (India, Japan, Korea).


Barbula amplexifolia belongs in sect. Convolutae by the convolute-sheathing perichaetial leaves, lack of hydroid cells in costa, and occasional prorulae on abaxial surface of costa. It is distinguished from B. convoluta most immediately by the stiff and sharply pointed leaves with a smooth, short mucro. On further study, the distinctions between B. coreensis (Cardot) K. Saito and this species made by M. S. Ignatov and R. H. Zander (1993) do not hold; e.g., the type of B. haringae has short, 65–75 µm, propagula and rough costal abaxial surface; a specimen from the Northwest Territories (Steere 76-605, NY) has rough costae and propagula variably 90–150 µm; the type of B. amplexifolia has a smooth costa and intermediate-sized propagula, ca. 90 µm. Barbula convoluta var. eustegia (as in the type of B. whitehouseae) may have a similarly stout costa, but the percurrent costa is apiculate only by a single, usually papillose cell and has narrower, nonsheathing leaves.

Selected References


Lower Taxa


Facts about "Barbula amplexifolia"
AuthorRichard H. Zander +
Authority(Mitten) A. Jaeger +
BasionymsTortula amplexifolia +
DistributionGreenland +, Alta. +, B.C. +, N.W.T. +, Alaska +, Ariz. +, Calif. +, Asia (India +, Japan + and Korea). +
Elevationmoderate to high elevations (700-1800 m) +
HabitatRock, often limestone, occasionally sandstone, usually in moist areas, mountain slopes, cliffs, tundra, mist zone of waterfalls +
Illustration copyrightFlora of North America Association +
IllustratorPatricia M. Eckel +
Publication titleBer. Thätigk. St. Gallischen Naturwiss. Ges. +
ReferenceNone +
Source xml grained fna xml/V27/V27 768.xml +
SynonymsBarbula coreensis + and Barbula haringae +
Taxon familyPottiaceae +
Taxon nameBarbula amplexifolia +
Taxon parentBarbula +
Taxon rankspecies +
VolumeVolume 27 +