Sphagnum recurvum |
Sphagnum pacificum |
|
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recurved sphagnum |
Pacific sphagnum |
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Habit | Plants moderate-sized to robust, moderately stiff-stemmed, ± lax, but not compact; green to pale yellow to yellowish brown; capitulum typically strongly convex in open grown forms, but flat and ± 5-radiate in shade forms. | Plants moderate-sized and fairly strong-stemmed; green, yellow to yellowish brown; capitulum 5radiate in shade forms to hemispherical in open grown or drier growing forms. |
Stem(s) | pale green to yellowish; superficial cortex of 2 layers of enlarged, thin-walled and well differentiated cells.; stem leaves triangular, triangular-lingulate to lingulate, more than 0.8 mm, appressed, apex obtuse to broadly obtuse, erose to fimbriate; hyaline cells efibrillose and nonseptate. |
leaves triangular to lingulate-triangular, 0.8–1.3 mm; typically appressed; apex acute to apiculate; hyaline cells efibrillose and nonseptate to rarely septate. |
Branches | straight and often tapering, often 5-ranked, leaves not much elongate at distal end of branches. |
straight and somewhat tapered, usually 5-ranked; leaves little elongate at the distal branch end. |
Branch leaves | ovate-lanceolate, 1.4–2 mm, straight; slightly undulate and sharply recurved; margins entire; hyaline cells on convex surface with 1 pore per cell at cell apex, concave surface with round wall thinnings in the cell ends and angles; chlorophyllous cells triangular in transverse section and well-enclosed on concave surface. |
ovate to narrowly ovate-lanceolate; (1.1–)1.4–1.8(–3.1) mm; slightly undulate and sharply recurved when dry, somewhat subsecund; margins entire; hyaline cells on convex surface with usually 1 round pore on apical end, on concave surface with wall thinnings in the cell ends and angles; chlorophyllous cells broadly triangular in transverse section and very deeply enclosed on the concave surface. |
Sexual condition | dioicous. |
dioicous. |
Spores | 22–28 µm; papillose on both surfaces; proximal laesura more than 0.5 spore radius. |
19–25 µm; finely papillose on both surfaces. |
Branch | fascicles with 2 spreading and 2 pendent branches.; branch stems green, cortex enlarged with conspicuous retort cells. |
fascicles with 2 spreading and 2–3 pendent branches.; branch stems green but often reddish at proximal end, with cortex enlarged with conspicuous retort cells. |
Sphagnum recurvum |
Sphagnum pacificum |
|
Phenology | Capsules mature late summer to early fall. | |
Habitat | Forming carpets in a variety of very poor to poor fen habitats, including sedge fens, pocosins, bay swamps | Forested and open poor fen habitats, often as a ruderal species in extensive mats |
Elevation | low to moderate elevations | low to moderate elevations |
Distribution |
AL; AR; CT; DE; FL; GA; IL; IN; KY; LA; MA; MD; ME; MO; MS; NC; NH; NJ; NY; OH; PA; SC; TN; TX; VA; VT; WV; NF; NS; South America
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AK; OR; WA; BC |
Discussion | Sporophytes in Sphagnum recurvum are uncommon. This species is found exclusively in the New World. It has several strong characters that distinguish it from S. flexuosum, and the opinion of H. A. Crum (1997) that the two species are synonymous is rejected. See discussion under 30. S. flexuosum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sporophytes in Sphagnum pacificum are uncommon. See discussion under 26. S. brevifolium. Characters of the spores are taken from Flatberg’s description. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 75. | FNA vol. 27, p. 74. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. pentastichon, S. pulchricoma, S. riparioides | |
Name authority | P. Beauvois: Prodr. Aethéogam., 88. (1805) | Flatberg: Bryologist 92: 116, figs. 1–20. (1989) |
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