Sphagnum capillifolium |
Sphagnum steerei |
|
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common red peat-moss, small red peat moss, sphagnum |
steere's sphagnum |
|
Habit | Plants small to moderate-sized, compact to fairly slender, normally stiff and erect; capitulum typically hemispherical; in exposed sites red, mottled red and green, in shaded sites green forms are common; without metallic lustre when dry. | Plants moderate-sized to large, compact and stiff-stemmed with upswept branches; dark green and brown, dark chesnut brown, brown to blackish brown, often with bluish tinge when dry; forming dense low to moderately tall hummocks. |
Stem(s) | green to red; superficial cortical cells aporose Stem leaves lingulate-triangular, 1.2–1.6(–1.8) mm, apex ± involute; border entire and broadened to about 0.25 the width of the base; hyaline cells S-shaped, 0–1-septate, usually fibrillose in distal portion of leaf. |
leaves to 1.2 × 0.8 mm; rarely hemiisophyllous; hyaline cells mostly nonseptate, comb-lamellae usually absent, but sometimes weak. |
Branches | not 5-ranked, terete. |
short and blunt-tipped, leaves spreading. |
Branch leaves | ovate-lanceolate, 1–1.4 mm, imbricate to moderately spreading, concave, straight, strongly involute near apex; hyaline cells on convex surface with elliptic pores along commissures, concave surface with large round pores away from commissures in proximal portions of leaf. |
ovate to ovate-elliptical, 1.6–2.2 × 1 mm; hyaline cells on proximal half of convex surface with round to elliptic pores along the commissures; comb-lamellae on hyaline cell wall where overlying chlorophyllous cells; chlorophyllous cells broadly triangular in transverse section and well-enclosed on convex surface, end wall not thickened. |
Sexual condition | dioicous. |
dioicous. |
Capsule | unknown. |
|
Spores | 20–28 µm; finely papillose on both surfaces, with distinct raised Y-shaped sculpture on distal surface; proximal laesura 0.5 spore radius or more. |
unknown. |
Branch | fascicles with 2 spreading and 1–2 pendent branches. |
fascicles with 2 spreading and 1 pendent branch.; branch stems with hyaline cells non-ornamented, no or weak funnel-like projections on the end walls of cortical cells, cortical cell walls usually with large round pores. |
Sphagnum capillifolium |
Sphagnum steerei |
|
Phenology | Capsules mature mid summer. | |
Habitat | Ombrotrophic, broad range of acidic environments, also forming dense mats and carpets over wet, acidic rocks and peat, especially at higher elevations, less frequent in forested fen vegetation | Commonly in firm-bottomed poor to medium fen vegetation, subarctic to arctic regions |
Elevation | low to high elevations | low to moderate elevations |
Distribution |
AK; CA; CT; ID; IL; IN; KY; MA; ME; MI; MN; MT; OH; OR; PA; RI; SD; TN; VA; VT; WA; WV; WY; AB; BC; MB; NB; NF; NS; NT; NU; ON; PE; QC; SK; YT; Greenland; Europe
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AK; MB; NT; NU; QC; YT; e Asia |
Discussion | Sporophytes are fairly common in Sphagnum capillifolium. This species is most common and abundant in ombrotrophic heath vegetation associated with S. angustifolium, S. fallax, S. fuscum, S. magellanicum, S. rubellum, Polytrichum commune, and P. juniperinum. It can be distinguished from most other red species of sect. Acutifolia with which it co-occurs by its lack of 5-ranking in the branches. Sphagnum subtile is a forest and non-hummock forming species that has a distinctly shorter and more triangular-lingulate stem leaf. The stem leaf border on S. subtile is also more strongly bordered. Sphagnum tenerum, which geographically overlaps S. capillifolium only very minimally, has much more turgid branches and a generally more robust look. The stem leaf of S. tenerum is triangular-lingulate as compared to the lingulate- triangular stem leaf of S. capillifolium. See also discussion under 84. S. subnitens and 87. S. tenerum. The names Sphagnum acutifolium Schrader and S. nemoreum Scopoli (doubtful name) have also been used for this taxon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sphagnum steerei is usually easily recognized in the field by its dense growth habit and dark brown color. Its ecology is somewhat unclear due to taxonomic confusion with S. imbricatum in the strict sense and S. austinii (R. E. Andrus 1987). The latter is the only species in the imbricatum complex that occurs where S. steerei does. Contrary to the view of H. A. Crum (1997), S. steerei is quite distinct from S. affine and S. austinii. There is no range overlap with either of those species and the macroscopic appearance is also quite different. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 91. | FNA vol. 27, p. 54. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. palustre var. capillifolium, S. capillaceum, S. capillifolium var. viride, S. margaritae | S. imbricatum var. arcticum |
Name authority | (Ehrhart) Hedwig: Fund. Hist. Nat. Musc. Frond. 2: 86. (1782) | R. E. Andrus: Bryologist 90: 218. (1987) |
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