Sphagnum angustifolium |
Sphagnum inundatum |
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fine bogmoss, poor-fen peat-moss, sphagnum |
lesser cow-horn bog-moss, lesser cow-horn peat moss, water sphagnum |
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Habit | 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. | Plants moderate-sized, green in the shade to variegated yellow or orange or both in open habitats; capitulum typically rounded. |
Stem(s) | leaves equilateral to isosceles-triangular, small, less than 0.8 mm, mostly appressed to stem, apex acute to obtuse, hyaline cells efibrillose and nonseptate. |
leaves lingulate to triangular-lingulate, 0.9–1.2 mm, apex rounded, usually 1/3–1/2 of leaf fibrillose; hyaline cells usually fibrillose in distal 1/3–1/2 of leaf, on convex surface near apex with 1–3 pores per cell, on concave surface near apex 1–4 pores per cell. |
Branches | straight to slightly curved, usually 5-ranked; leaves not much longer at distal end than proximal end. |
arched but rarely curved and contorted. |
Branch leaves | narrowly ovate-lanceolate, 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. |
ovate, 1–1.5 mm, straight to slightly subsecund; hyaline cells of convex surface with numerous ringed pores along the commissures (12–22 per cell), 0–3 pores per cell on the concave surface. |
Sexual condition | dioicous. |
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Capsule | with few pseudostomata. |
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Spores | 21–25 µm; coarsely papillose on proximal and distal surfaces; proximal laesura more than 0.5 spore radius. |
30–37 µm; finely papillose on both surfaces, indistinct raised Y-shaped sculpture on distal surface; proximal laesura 0.5 spore radius or less. |
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. |
fascicles with 2–3 spreading and 2–3 pendent branches. |
Sphagnum angustifolium |
Sphagnum inundatum |
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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 | Weakly minerotrophic habitats such as the margins of ponds, marshes, and mires, in addition to seeps and dripping cliff faces |
Elevation | low to high elevations | low to moderate elevations |
Distribution |
AK; CA; CO; ID; IL; IN; MA; MD; ME; MI; MN; MO; MT; NC; ND; NH; NJ; NY; OH; OR; PA; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; NT; ON; QC; SK; YT; Greenland; Eurasia
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AK; CT; DE; KY; MA; ME; NC; NH; NJ; NY; OH; PA; RI; SC; VA; VT; WV; BC; NB; NF; NS; QC; 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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The sporophytes of Sphagnum inundatum are uncommon. The ovate, concave branch leaves that are occasionally subsecund give this species an appearance similar to that of S. subsecundum, from which it can usually be distinguished by its larger size. Sphagnum lescurii typically has distinctly larger stem leaves and capitulum branches that can be quite turgid and curved in open-grown forms. The names Sphagnum bavaricum Warnstorf and S. bushii Warnstorf & Cardot have been applied to this taxon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 64. | FNA vol. 27, p. 81. |
Parent taxa | Sphagnaceae > Sphagnum > sect. Cuspidata | Sphagnaceae > Sphagnum > sect. Subsecunda |
Sibling taxa | ||
Synonyms | S. recurvum var. angustifolium, S. amblyphyllum var. parvifolium, S. flexuosum var. tenue, S. parvifolium, S. recurvum var. parvifolium, S. recurvum var. tenue | S. auriculatum var. inundatum, S. novo-foundlandicum, S. subsecundum var. inundatum |
Name authority | (Warnstorf) C. E. O. Jensen: Bih. Svenska Vetensk.-Akad. Handl. 16(9): 46. (1891) | Russow: Arch. Naturk. Liv- Ehst- Kurlands, Ser. 2, Biol. Naturk. 10: 390. (1894) |
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