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Polytrichastrum formosum
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Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum

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Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum
Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum

Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum
Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum

Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum
Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum

Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum
Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum

Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum
Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum

Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum
Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum

Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum
Polytrichastrum formosum
© Copyright Malcolm Storey 2011-2118 · 3
Polytrichastrum formosum
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Following modified from Taiwan Biodiversity National Information Network
   Top | See original

 
Kingdom Plantae  
 Phylum Bryophyta  
 Class Bryopsida  
 Order Polytrichales  
 Family Polytrichaceae  
 Genus Polytrichastrum  
  Polytrichastrum formosum  
  (Hedw.) Sm.  var.  densifolium  (Mitt.) Iwats. & Nog., 1973 
Provider: Chiang, Tzen-Yuh 
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Synonyms: Polytrichum densifolium Polytrichum formosum densifolium   details
Citation: Flora of North America Editorial Committee, 2007. Bryophytes: Mosses. Fl. N. Amer. 27(1): i–xxi, 1-711. Iwatsuki, Z. 1991. Cat. Mosses Japan 182 pp. Redfearn, P. L., Jr. & P.-c. Wu 1986. Catalog of the mosses of China. Ann. Missouri Bot. Gard. 73: 177–208. 高謙, 賴明洲 2003, 中國苔蘚植物圖鑑
Name Code: 201073
  
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Following modified from Flora of North America
   Top | See original

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FNA Vol. 27 Page 125, 130 , 131, 132 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 27 | Polytrichaceae | Polytrichastrum

5. Polytrichastrum formosum (Hedwig) G. L. Smith, Mem. New York Bot. Gard. 21(3): 37. 1971.

Polytrichum formosum Hedwig, Sp. Musc. Frond., 92, plate 19, fig. 1a. 1801; P. attenuatum Menzies

Plants medium and slender to large and robust, green to dark olive green to blackish, in loose tufts. Stems (2-)3-8(-20) cm, mostly unbranched. Leaves 6-8(-12) mm, erect to erect-spreading when dry, spreading to subsquarrose and broadly recurved when moist; sheath ovate to elliptic, yellowish, hyaline-margined, gradually tapering or abruptly contracted to the blade, the cells at the shoulders forming a differentiated hinge; blade lanceolate to linear; costa prominent abaxially and toothed near the tip; excurrent as a short, toothed point; marginal lamina erect, (2-)3-5(-10) cells wide, plane or erect, sharply toothed from apex nearly to the sheath; lamellae (3-)4-5(-7) cells high, margins ± entire to finely serrulate in profile, the marginal cells in section rounded to narrowly elliptic and somewhat taller than the cells beneath, the cell walls not or moderately thickened; median cells of sheath 8-12 µm wide, narrowly rectangular, 5-7(-10):1; cells of marginal lamina subquadrate, 10-15 µm. Sexual condition dioicous or polygamous; perichaetial leaves similar to the foliage leaves, or somewhat longer, with a longer sheath. Seta 3-6 cm, yellowish to reddish brown. Capsule 4-7 mm, rather slender or short-rectangular, acutely 4(-6)-angled, inclined to almost horizontal, pale yellowish brown to brownish; hypophysis cylindric, indistinctly delimited or set off by a shallow groove; exothecium smooth or the cells weakly convex, quadrate to hexagonal, without a central thin spot; peristome 600 µm, divided to 0.6, the teeth 64 and highly regular in form or fewer and somewhat irregular, pale to brownish; epiphragm absent marginal teeth. Spores 12-16 µm.

Varieties 3 (2 in the flora): widespread, temperate to cool temperate latitudes in the Northern Hemisphere.

European treatments often assert a similarity between Polytrichastrum formosum and Polytrichum commune, which cannot be said of the North American expression of the species. The habitat and ecology of the European plants are also distinct: A. J. E. Smith (2004) described P. formosum in Britain as a common and weedy species of heaths, moorland, woods, outcrops, and old walls.

Updated: 2020-02-19 06:32:05 gmt
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