Sphagnum angustifolium

(Warnstorf) C. E. O. Jensen

Bih. Svenska Vetensk.-Akad. Handl. 16(9): 46. 1891,.

Basionym: Sphagnum recurvum var. angustifolium Warnstorf Nyt. Mag. Naturvidensk. 31: 213. 1888
Synonyms: Sphagnum amblyphyllum var. parvifolium (Sendtner) Warnstorf Sphagnum flexuosum var. tenue (H. Klinggraff) Pilous Sphagnum parvifolium Sphagnum recurvum var. parvifolium Warnstorf Sphagnum recurvum var. tenue H. Klinggraff
Treatment appears in FNA Volume 27. Treatment on page 64. Mentioned on page 19, 63, 65, 66, 68, 84, 89, 92, 94, 96.

Plants small and often slender and soft, lax to compact, moderately stiff-stemmed; green to pale-yellow to golden brown to brown; capitulum strongly convex in drier grown forms to strongly 5-radiate and flat in wetter growing forms. Stems pale green to pale-brown, often with pinkish red patches, cortex undifferentiated. Stem-leaves equilateral to isosceles-triangular, small, less than 0.8 mm, mostly appressed to stem, apex acute to obtuse, hyaline cells efibrillose and nonseptate. Branches straight to slightly curved, usually 5-ranked; leaves not much longer at distal end than proximal end. Branch fascicles with 2 spreading and 2–3 pendent branches. Branch stems with cortex enlarged with conspicuous retort cells, often pinkish red at proximal end. Branch leaves narrowly ovatelanceolate, 0.8–1 mm, straight, moderately undulate and recurved in larger and/or wetter grown forms, not undulate and slightly recurved in compact forms from drier sites; margins entire; hyaline cells on convex surface with 1 (2–3) pore per cell at apical end of cell, on concave surface with round wall-thinnings in cell ends and angles; chlorophyllous cells triangular in transverse-section and just enclosed on concave surface. Sexual condition dioicous. Spores 21–25 µm; coarsely papillose on proximal and distal surfaces; proximal laesura more than 0.5 spore radius.


Habitat: Wide range of habitats, from ombrotrophic to rich fens, open mires, sedge fens and muskeg, as carpets, floating mats, low hummocks and hummock sides
Elevation: low to high elevations

Distribution

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., Que., Sask., Yukon, Alaska, Calif., Colo., Idaho, Ill., Ind., Maine, Md., Mass., Mich., Minn., Mo., Mont., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Oreg., Pa., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Eurasia

Discussion

The sporophytes of Sphagnum angustifolium are somewhat common. This species is distinguished from similar ones in sect. Cuspidata by the small, triangular, obtuse and appressed stem leaves. It also often has a pink stem, as opposed to the reddish branch bases seen in some other species of the section. Sphagnum balticum has stem leaves that are more lingulate-triangular as well as spreading from the stem. Sphagnum angustifolium belongs to a subgroup within sect. Cuspidata usually referred to as S. recurvum, in the broad sense, a group of mostly carpet-forming species that differ from other members of the section in having pairs of pendent branch buds visible between the capitulum rays. The group also includes S. brevifolium, S. fallax, S. flexuosum, S. pacificum, S. recurvum, S. rubroflexuosum, and S. splendens.

Selected References

None.

Lower Taxa

None.
... more about "Sphagnum angustifolium"
acute;obtuse +
Cyrus B. McQueen† +  and Richard E. Andrus +
(Warnstorf) C. E. O. Jensen +
Sphagnum recurvum var. angustifolium +
differentiated +
broad +  and narrow +
fascicles +  and 5-ranked +
straight;slightly curved +
more slender and delicate +
ratio +, length +  and width +
recurved;recurved +
not undulate +, undulate +  and ovatelanceolate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
pendent +  and spreading +
2 +  and 3 +
slender +
differentiated +
chlorophyllous +  and efibrillose +
alternating +
strengthened +
nonornamented +
dioicous +  and sexual +
triangular +
enlarged +
fibrillose +
spherical +
0 cm0 mm <br />0 m <br /> (?) +  and 0.2 cm2 mm <br />0.002 m <br /> (?) +
monoicous +, dioicous +  and sexual +
undifferentiated +
enlarged +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Ill. +, Ind. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +  and Eurasia +
low to high elevations +
monoicous +, dioicous +  and sexual +
conspicuous +
isophyllous +, hemiisophyllous +  and anisophyllous +
compact +  and 5-radiate +
Wide range of habitats, from ombrotrophic to rich fens, open mires, sedge fens and muskeg, as carpets, floating mats, low hummocks and hummock sides +
0 cm0 mm <br />0 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
equilateral;isosceles-triangular +
inconspicuous +  and conspicuous +
pinkish red +
Bih. Svenska Vetensk.-Akad. Handl. +
tetrahedral +
septate +, porose +  and efibrillose +
triangular;lingulate +
usually smaller +
pale green;pale-brown +
differentiated +
with a few to numerous pores or pseudopores +  and porose +
concave +  and convex +
Sphagnum amblyphyllum var. parvifolium +, Sphagnum flexuosum var. tenue +, Sphagnum parvifolium +, Sphagnum recurvum var. parvifolium +  and Sphagnum recurvum var. tenue +
Sphagnum angustifolium +
Sphagnum sect. Cuspidata +
species +
swollen +
green +  and pale-yellow +
slender +  and small +