Polytrichastrum formosum

PLANTAE / CRYPTOGAMAE / BRYOPHYTA / POLYTRICHOPSIDA / POLYTRICHALES / POLYTRICHACEAE / POLYTRICHASTRUM / FORMOSUM

Polytrichastrum formosum (Hedw.) G.L.Sm.

Indigenous

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Morphological description

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. From: Merrill, GL. 2007. 8. Polytrichaceae Schwägrichen. Fl. N. Amer. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=10721 [Permission to reproduce this work was granted to SANBI by the New York Botanical Garden Press] [All rights reserved]

Diagnostic description

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. From: Merrill, GL. 2007. 8. Polytrichaceae Schwägrichen. Fl. N. Amer. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=10721 [Permission to reproduce this work was granted to SANBI by the New York Botanical Garden Press] [All rights reserved]

Distribution

Widespread, temperate to cool temperate latitudes in the Northern Hemisphere. From: Merrill, GL. 2007. 8. Polytrichaceae Schwägrichen. Fl. N. Amer. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=10721 [Permission to reproduce this work was granted to SANBI by the New York Botanical Garden Press] [All rights reserved]

Occurrence records map

This map contains point-based occurrences at different locations

iNaturalist: BODATSA: Data partners records:

Residence status

Occurrence in the Flora of Southern Africa (FSA) countries and South African provinces. Residence status indicates if a taxon is indigenous, endemic, naturalised or invasive in a specific region. This data is based on specimen records and literature

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