Sphagnum beothuk |
Sphagnum recurvum |
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recurved sphagnum |
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Habit | Plants small to moderate-sized; capitulum rounded and dense; dark brown with a purplish sheen. | 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. |
Stem | brown, superficial cortical cells aporose.; stem leaves lingulate, 1.1–1.2 mm, apex slightly apiculate to mostly broad and erose to lacerate, border only slightly broadened at base; hyaline cells rhomboid and 0–1-septate. |
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. |
Branches | more or less 5-ranked. |
straight and often tapering, often 5-ranked, leaves not much elongate at distal end of branches. |
Branch leaves | 0.95–1.3 mm, ovate to ovate-lanceolate, concave, straight to slightly subsecund, apex involute; hyaline cells on convex surface with numerous surface with numerous round to elliptic pores along the commissures, grading from large pores at the base to a mixture of small and tiny (2 µm) at the apex, concave surface with a few large, round pores/cell in lower side regions. |
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. |
Sexual condition | unknown. |
dioicous. |
Spores | 22–28 µm; papillose on both surfaces; proximal laesura more than 0.5 spore radius. |
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Branch | fascicles with 2 spreading and 1 pendent branch. |
fascicles with 2 spreading and 2 pendent branches.; branch stems green, cortex enlarged with conspicuous retort cells. |
Sphagnum beothuk |
Sphagnum recurvum |
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Phenology | Capsules mature late summer to early fall. | |
Habitat | Forming dense hummocks in minerotrophic peatlands | Forming carpets in a variety of very poor to poor fen habitats, including sedge fens, pocosins, bay swamps |
Elevation | moderate elevations | low to moderate elevations |
Distribution |
NF |
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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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.) |
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Source | FNA vol. 27, p. 90. | FNA vol. 27, p. 75. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. pentastichon, S. pulchricoma, S. riparioides | |
Name authority | R. E. Andrus: Sida 22: 966, figs. 21–26. (2006) | P. Beauvois: Prodr. Aethéogam., 88. (1805) |
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