Sphagnum subsecundum |
Sphagnum junghuhnianum |
|
---|---|---|
cow-horn peat-moss, sphagnum |
junghuhn's sphagnum |
|
Habit | Plants small, slender, often wiry; green, yellow-brown or golden brown; capitulum small with terminal bud absent. | Plants moderate-sized, soft, loosely tufted, slender, capitulum flat-topped to rounded; pale, dirty green, yellowish to brownish; without metallic lustre when dry. |
Stem(s) | leaves triangular-lingulate, 0.8 mm or less; apex entire or weakly denticulate, hyaline cells sometimes septate, efibrillose and aporose except near apex. |
leaves triangular-lingulate, 1.2–1.6 mm, broadly apex acute to narrowly truncate and toothed, border narrow or indistinct at base (less than 0.25 the width); hyaline cells rhomboid, mostly 0–1-septate; convex surface with membrane pleats, concave surface with 1–3 rounded membrane gaps occupying most of cell. |
Branches | often short and blunt. |
somewhat 5-ranked. |
Branch leaves | ovate-lanceolate, 1.3–2 mm, strongly concave, apex strongly involute; margins entire to somewhat toothed near apex, hyaline cells on convex surface with numerous ringed elliptic pores (6–10) along commissures, concave surface mostly aporose except near margins; Sexual condition dioicous or monoicous. |
|
Sexual condition | dioicous. |
|
Capsule | exserted, with few pseudostomata. |
|
Spores | 30–35 µm; finely papillose on both surfaces, distinct bifurcated Y-mark sculpture on distal surface; proximal laesurae more than 0.5 spore radius. |
21–23 µm; minutely papillose. |
Branch | fascicles with 2–3 spreading and 2–3 pendent branches Branch leaves broadly ovate, subsecund, hyaline cells on convex surface with very numerous small pores (18–40 per cell) in a continuous row along the commissures, concave surface usually aporose. |
fascicles with 2 spreading and 1–2 pendent branches. |
Sphagnum subsecundum |
Sphagnum junghuhnianum |
|
Habitat | Minerotrophic, near the edges of open, poor fens, less commonly found in open medium fens | Shady, seepy cliffs |
Elevation | low to high elevations | low elevations |
Distribution |
AK; CA; CO; CT; ID; IL; IN; MA; ME; MI; MN; MT; NH; NJ; NY; OH; OR; PA; RI; VT; WA; WI; WY; AB; BC; MB; NB; NF; NS; NT; ON; QC; YT; Greenland; Eurasia
|
BC; e Asia |
Discussion | Sporophytes are rare in Sphagnum subsecundum. This species is often associated with S. angustifolium, S. centrale, S. fimbriatum, S. flexuosum, S. palustre, and S. teres. The most widespread and common species of sect. Subsecunda, it exhibits considerable phenotypic plasticity in size. However, the stem leaves are always quite small in comparison to those of similar species. See also discussions under 52. S. contortum and 55. S. inexspectatum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sphagnum junghuhnianum in the flora area is known only from the Queen Charlotte Islands. Sporophytes of Sphagnum junghuhnianum were not seen. Three other large, brown species of sect. Acutifolia have stem leaves without fimbriate to lacerate apices, S. subnitens (forms without red color), S. subfulvum, and S. flavicomans. Sphagnum flavicomans has a more pointed stem leaf and a darker brown color as well as a strongly different ecology and range. Both S. subnitens and S. subfulvum have a glossy sheen when dry that is lacking in S. junghuhnianum. Sexual condition and spore characters were taken from H. A. Crum (1984). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 84. | FNA vol. 27, p. 95. |
Parent taxa | Sphagnaceae > Sphagnum > sect. Subsecunda | Sphagnaceae > Sphagnum > sect. Acutifolia |
Sibling taxa | ||
Synonyms | S. crispum | S. junghuhnianum subsp. pseudomolle, S. pseudomolle |
Name authority | Nees: in J. Sturm et al., Deutschl. Fl. 2(17): species 3. (1819) | Dozy & Molkenboer: Verh. Kon. Akad. Wetensch., Afd. Natuurk. 2: 8. (1854) |
Web links |