Sphagnum balticum |
Sphagnum sitchense |
|
---|---|---|
Baltic peat-moss, Baltic sphagnum |
|
|
Habit | Plants small to moderate-sized, soft and ± weak-stemmed; brownish green, yellow-green, yellowish to golden brown, capitulum typically flat and 5-radiate. | Plants moderate-sized; capitulum flat-topped and dense; pale yellow and pink, lacking sheen. |
Stem(s) | leaves 0.8–1.1 mm, triangular-lingulate to lingulate, concave, spreading, apex broadly obtuse, hyaline cells fibrillose in apical region. |
pink, superficial cortical cells aporose.; stem leaves narrowly triangular to lingulate- triangular, 1.2–1.6 × 0.6–0.8 mm, length: width ratio ca. 2:1, apex apiculate, border strong and moderately broadened basally; hyaline cells narrowly rhomboid and 1 to occasionally 2 septate, often fibrillose apically. |
Branches | slender and tapering, often 5-ranked and decurved, leaves somewhat elongated at distal end. |
not 5-ranked. |
Branch leaves | ovate-lanceolate, 1–1.7 mm, straight, slightly undulate and spreading; margin entire, hyaline cells on convex surface with 1–5 pores in cell ends and free near apex, on concave surface with round wall thinnings in cell ends and angles; chlorophyllous cells triangular in transverse section and well-enclosed on concave surface. |
1.3–1.5 × 0.5–0.55 mm, ovate-lanceolate, concave, straight, apex involute; hyaline cells on convex surface with numerous round to elliptic pores along the commissures, grading from large elliptical pores at the base to moderate-sized round pores at the apex, concave surface with a few large round pores scattered throughout. |
Sexual condition | dioicous. |
unknown. |
Spores | 25–33 µm; smooth to finely papillose on both surfaces; proximal laesura approximately 0.5 spore radius. |
|
Branch | fascicles with 2 spreading and mostly 1 pendent branch.; branch stem green, cortex enlarged with conspicuous retort cells. |
fascicles with 2 spreading and 1 pendent branch. |
Sphagnum balticum |
Sphagnum sitchense |
|
Habitat | Abundant in hollows and floating mats in raised bogs and poor fens | Known only from type locality where it was forming low dense hummocks in alpine tundra |
Elevation | low to high elevations | moderate elevations |
Distribution |
AK; CO; AB; BC; MB; NT; NU; ON; QC; YT; Greenland; Eurasia |
AK |
Discussion | Unlike Sphagnum angustifolium and S. annulatum, S. balticum has stem leaves exerted at right angles to the stem. It also has fewer and weaker hanging branches than does S. angustifolium, which make the stem itself often visible and the stem leaves easier to see. Sphagnum balticum also lacks the paired pendent branch buds between the capitulum rays as seen in S. angustifolium. In Sphagnum kenaiense there are sometimes spreading stem leaves but this species has 2 hanging branches per fascicle. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 27, p. 65. | FNA vol. 27, p. 98. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. recurvum subsp. balticum | |
Name authority | (Russow) C. E. O. Jensen: in Botaniske Forening København, Festskrift, 100. (1890) | R. E. Andrus: Sida 22: 969, figs. 27–34. (2006) |
Web links |