Sphagnum oregonense
Sphagnum fuscum
Oregon sphagnum
common brown peat-moss, rusty bogmoss, rusty peat moss, sphagnum
leaves lingulate, 1–1.2 mm, apex entire to somewhat erose;
hyaline cells non-septate;
fibrillose and porose in apical region.
leaves lingulate, 0.8–1.3 mm;
apex broadly rounded and entire to lacerate, sometimes slightly mucronate or slightly denticulate;
hyaline cells rhombic, 0–1(–2)-septate, usually efibrillose.
slender with small spreading leaves.
long and slender to short and compact, unranked to 5-ranked.
ovate-lanceolate, 1.4–1.6 mm, straight to slightly subsecund, weakly undulate, often recurved in capitulum branches;
hyaline cells on convex surface with up to 5 small round faint pores per cell in the basal portion of the cell and free from the cell margins, concave surface aporose.
ovate-lanceolate, 1.1–1.3 mm, straight, concave, apex strongly involute;
margins entire, hyaline cells on convex surface with round to elliptic pores along the commissures, grading from small pores near the leaf apex to large pores near the base, concave surface with large round pores in proximal marginal regions of leaf.
unknown.
dioicous.
not seen.
not seen.
17–30 µm, finely papillose on proximal surface and pusticulate on distal surface;
proximal laesura less than 0.5 spore radius.
fascicles with 2 spreading and 2 pendent branches.
fascicles with 2 spreading and 1–2 pendent branches.
Sphagnum oregonense
Sphagnum fuscum
Sphagnum oregonense is currently known only from the type locality. Sporophytes of it are unknown. It is associated with other minerotrophic bryophytes such as Meesia triquetra, Calliergon cordifolium, and Campylium polygamum. This is a curious species that has an obvious close relationship with sect. Cuspidata. When wet it is similar in appearance to S. subsecundum but upon drying the sightly undulate and recurved branch leaves give it the charactereistic appearance of this section. The branch leave porosity is also more similar to that of species in sect. Cuspidata than that found in sect. Subsecunda.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Sphagnum fuscum is common in ombrotrophic mires and alpine mountain summits where it may form small to large hummocks to 1 m in height, more infrequently in weakly minerotrophic mires and richer fens.
Sporophytes are common in Sphagnum fuscum, which is associated with S. angustifolium, S. fallax, S. magellanicum, S. papillosum, and more infrequently with S. teres, and S. warnstorfii in richer sites. Very widespread but generally easily recognized, it is the only small brown hummock-forming species of sect. Acutifolia over most of its range. There are some significant variations in this species. The stem leaves can vary from having a rounded, entire apex to having a somewhat flat and lacerate apex. The branches also vary from being unranked and slender to 5-ranked and blunt. The color also can vary from a light to a dark brown. There does not seem, however, to be any consistent pattern to these variations and thus no taxonomic recognition has been given to them. See also discussion under 73. S. flavicomans.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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