FNA: Sphagnum austinii

	Sphagnum austinii
	Austin's peat-moss, Austin's sphagnum
Habit	Plants moderate-sized to large, usually quite compact; reddish brown and often yellow flecked with red-brown; in dense stands forming large and tall hummocks.
Stem(s)	leaves 1.2–1.6 × 1 mm; rarely hemiisophyllous; hyaline cells nonseptate or more typically mostly septate, comb-lamellae present on interior wall.
Branches	clavate, tapering to short point, tightly imbricate at proximal end to somewhat spreading at distal end in less compact forms.
Branch leaves	ovate-elliptical to elliptical, 1.5–2.1 × 0.8–1.4 mm; hyaline cells on convex surface with numerous moderate-sized round pores along the commissures, comb-lamellae present throughout most of leaf; chlorophyllous cells broadly triangular in transverse section and well-enclosed on the convex surface, end wall not thickened.
Sexual condition	dioicous.
Capsule	with scattered pseudostomata.
Spores	23–28 µm; coarsely granulate on both surfaces; proximal laesura more than 0.50 spore radius.
Branch	fascicles with 2 spreading and 1 pendent branch.; branch stems with cortical cell comb-lamellae visible on interior wall, conspicuous funnel-like projection on interior end walls extending to next cell less than one half its length, pores in superficial wall restricted to leaf bases.

	Sphagnum austinii
Phenology	Capsules common, mature mid summer.
Habitat	Ombrotrophic mires and large hummocks in blanket mires
Elevation	low to moderate elevations
Distribution	AK; MA; ME; NJ; VT; WA; BC; NB; NF; NS; Europe
Discussion	Sphagnum austinii is usually easily recognized in the field by its strongly imbricate and clavate branches. It forms very dense and often tall hummocks with a distinct deep golden brown color. In contrast to the view stated by H. A. Crum (1997), this species has an ecology and distribution quite distinct from those of S. affine. Sphagnum affine is a minerotrophic species that does not even occur in the Pacific coast region, where S. austinii is quite prominent. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 27, p. 50.
Parent taxa	Sphagnaceae > Sphagnum > sect. Sphagnum
Sibling taxa	S. affine, S. alaskense, S. andersonianum, S. angermanicum, S. angustifolium, S. annulatum, S. aongstroemii, S. arcticum, S. atlanticum, S. balticum, S. bartlettianum, S. beothuk, S. bergianum, S. brevifolium, S. capillifolium, S. carolinianum, S. centrale, S. compactum, S. contortum, S. cribrosum, S. cuspidatum, S. cyclophyllum, S. fallax, S. fimbriatum, S. fitzgeraldii, S. flavicomans, S. flexuosum, S. fuscum, S. girgensohnii, S. henryense, S. imbricatum, S. inexspectatum, S. inundatum, S. isoviitae, S. jensenii, S. junghuhnianum, S. kenaiense, S. lenense, S. lescurii, S. lindbergii, S. macrophyllum, S. magellanicum, S. majus, S. mcqueenii, S. mendocinum, S. microcarpum, S. mirum, S. mississippiense, S. molle, S. obtusum, S. oregonense, S. orientale, S. pacificum, S. palustre, S. papillosum, S. perfoliatum, S. perichaetiale, S. platyphyllum, S. portoricense, S. pulchrum, S. pylaesii, S. quinquefarium, S. recurvum, S. riparium, S. rubellum, S. rubiginosum, S. rubroflexuosum, S. russowii, S. sitchense, S. splendens, S. squarrosum, S. steerei, S. strictum, S. subfulvum, S. subnitens, S. subsecundum, S. subtile, S. talbotianum, S. tenellum, S. tenerum, S. teres, S. torreyanum, S. trinitense, S. tundrae, S. viride, S. warnstorfii, S. wilfii, S. wulfianum
Synonyms	S. cymbifolium subsp. austinii, S. cymbifolium var. austinii, S. imbricatum subsp. austinii
Name authority	Sullivant: in C. F. Austin, Musci Appalach., 2. 1870 (as austini),
Web links	Local floras: BC Local Web sites: PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Sphagnum austinii

Austin's peat-moss, Austin's sphagnum

Habit

Plants moderate-sized to large, usually quite compact; reddish brown and often yellow flecked with red-brown; in dense stands forming large and tall hummocks.

Stem(s)

leaves 1.2–1.6 × 1 mm; rarely hemiisophyllous;

hyaline cells nonseptate or more typically mostly septate, comb-lamellae present on interior wall.

Branches

clavate, tapering to short point, tightly imbricate at proximal end to somewhat spreading at distal end in less compact forms.

Branch leaves

ovate-elliptical to elliptical, 1.5–2.1 × 0.8–1.4 mm;

hyaline cells on convex surface with numerous moderate-sized round pores along the commissures, comb-lamellae present throughout most of leaf; chlorophyllous cells broadly triangular in transverse section and well-enclosed on the convex surface, end wall not thickened.

Sexual condition

dioicous.

Capsule

with scattered pseudostomata.

Spores

23–28 µm; coarsely granulate on both surfaces;

proximal laesura more than 0.50 spore radius.

Branch

fascicles with 2 spreading and 1 pendent branch.;

branch stems with cortical cell comb-lamellae visible on interior wall, conspicuous funnel-like projection on interior end walls extending to next cell less than one half its length, pores in superficial wall restricted to leaf bases.

Sphagnum austinii

Phenology

Capsules common, mature mid summer.

Habitat

Ombrotrophic mires and large hummocks in blanket mires

Elevation

low to moderate elevations

Distribution

AK; MA; ME; NJ; VT; WA; BC; NB; NF; NS; Europe

Discussion

Sphagnum austinii is usually easily recognized in the field by its strongly imbricate and clavate branches. It forms very dense and often tall hummocks with a distinct deep golden brown color. In contrast to the view stated by H. A. Crum (1997), this species has an ecology and distribution quite distinct from those of S. affine. Sphagnum affine is a minerotrophic species that does not even occur in the Pacific coast region, where S. austinii is quite prominent.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source

FNA vol. 27, p. 50.

Parent taxa

Sphagnaceae > Sphagnum > sect. Sphagnum

Sibling taxa

S. affine, S. alaskense, S. andersonianum, S. angermanicum, S. angustifolium, S. annulatum, S. aongstroemii, S. arcticum, S. atlanticum, S. balticum, S. bartlettianum, S. beothuk, S. bergianum, S. brevifolium, S. capillifolium, S. carolinianum, S. centrale, S. compactum, S. contortum, S. cribrosum, S. cuspidatum, S. cyclophyllum, S. fallax, S. fimbriatum, S. fitzgeraldii, S. flavicomans, S. flexuosum, S. fuscum, S. girgensohnii, S. henryense, S. imbricatum, S. inexspectatum, S. inundatum, S. isoviitae, S. jensenii, S. junghuhnianum, S. kenaiense, S. lenense, S. lescurii, S. lindbergii, S. macrophyllum, S. magellanicum, S. majus, S. mcqueenii, S. mendocinum, S. microcarpum, S. mirum, S. mississippiense, S. molle, S. obtusum, S. oregonense, S. orientale, S. pacificum, S. palustre, S. papillosum, S. perfoliatum, S. perichaetiale, S. platyphyllum, S. portoricense, S. pulchrum, S. pylaesii, S. quinquefarium, S. recurvum, S. riparium, S. rubellum, S. rubiginosum, S. rubroflexuosum, S. russowii, S. sitchense, S. splendens, S. squarrosum, S. steerei, S. strictum, S. subfulvum, S. subnitens, S. subsecundum, S. subtile, S. talbotianum, S. tenellum, S. tenerum, S. teres, S. torreyanum, S. trinitense, S. tundrae, S. viride, S. warnstorfii, S. wilfii, S. wulfianum

Synonyms

S. cymbifolium subsp. austinii, S. cymbifolium var. austinii, S. imbricatum subsp. austinii

Name authority

Sullivant: in C. F. Austin, Musci Appalach., 2. 1870 (as austini),

Web links

Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).

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Sphagnum austinii

Sphagnum austinii