Bryum pseudotriquetrum (Hedw.) G. Gaertn., B. Mey. & Scherb.

Bryum pseudotriquetrum (Hedw.) G. Gaertn., B. Mey. & Scherb. View in CoL [ Bryaceae ]

Description and iconography

Ochyra et al. (2008).

Distribution and habitat

This species is a bipolar moss with intermediate occurrences at high elevations. In Antarctica, it is considered to be frequent and widely distributed. Bryum pseudotriquetrum grows in a great diversity of both exposed and protected habitats. It is a common species in places with thaw runoff, growing between rocky mounds ( Ochyra et al. 2008). This species was found growing on soil protected by rocks, exposed soil and soil associated with waterfowl nests. Gametophytes of the species were found on the plateau, the slope and the coast. In relative terms, this species, together with A. brevirostris , was found more frequently and formed larger patches, reaching 20 m 2. It was observed growing alone or with other bryophytes.

Comments

This species is characterized by broad, long decurrent leaves, short excurrent costa, small distal lamina cells and red basal leaves. In the climatic conditions of Antarctica, the species presents great phenotypic variations; thus, the specimens of this species were often confused with other species ( Ochyra et al. 2008).

Bryum pseudotriquetrum (Hedw.) G. Gaertn., B. Mey. & Scherb. View in CoL [ Bryaceae ]

Examined material: Antarctica, Marambio Island, going down to the east from the Emergency House (64°14 ′ 23.92 ′′ S; 56°37 ′ 11.55 ′′ W; 184 m. a.s.l.), on soil protected by rocks, 12.1.2022, A. C. Cottet and L. P. Dopchiz ( BCRU 5660 About BCRU ) GoogleMaps ; ibid., descending from the plateau towards Caleta Larsen (64°13 ′ 53.8 ′′ S; 56° 36 ′ 27.97 ′′ W; 84 m. a.s.l.), on unprotected ground, 15.1.2022, A. C. Cottet and L. P. Dopchiz ( BCRU 5671 About BCRU ) GoogleMaps ; ibid., descending from the plateau towards the west coast from Las Cruces (64°13 ′ 50.70 ′′ S; 56°36 ′ 21.17 ′′ W; 180 m. a.s.l.), on soil protected by rocks, 16.1.2022, A. C. Cottet and L. P. Dopchiz ( BCRU 5678 About BCRU ) GoogleMaps ; ibid., descending from the plateau towards the west coast from the Very-High-Frequency Omnidirectional Range towards Streamlet La Tradición (64°14 ′ 03.28 ′′ S; 56°37 ′ 14.70 ′′ W; 181 m. a.s.l.), on soil protected by rocks, 17.1.2022, A. C. Cottet ( BCRU 5682 About BCRU ) GoogleMaps ; ibid., Streamlet La Tradición (64°13 ′ 49.51 ′′ S; 56°37 ′ 55.67 ′′ W; 26 m. a.s.l.), on unprotected soil, 17.1.2022, A. C. Cottet ( BCRU 5685 About BCRU ) GoogleMaps ; ibid., descending from the plateau towards the west coast by stream from the end of the track (64°14 ′ 18.82 ′′ S; 56° 38 ′ 58.06 ′′ W; 120 m. a.s.l.), on unprotected ground, 19.1.2022, A. C. Cottet ( BCRU 5692 About BCRU ) GoogleMaps ; ibid., Streamlet La Tradición (64°13 ′ 46.85 ′′ S; 56°39 ′ 19.76 ′′ W; 4 m. a.s.l..), on soil protected by rocks, 19.1.2022, A. C. Cottet ( BCRU 5701 About BCRU ) GoogleMaps ; ibid., East coast, stream prior to La Pingüinera area (64°17 ′ 35.52 ′′ S; 56° 41 ′ 41.24 ′′ W; 14 m. a.s.l.), on unprotected soil, 21.1.2022, A. C. Cottet ( BCRU 5712 About BCRU ) GoogleMaps ; ibid., west coast, near Casa de Botes , streamlet area to the north (64° 15 ′ 39.60 ′′ S; 56°43 ′ 57.97 ′′ W; 15 m. a.s.l.), on unprotected soil, 29.1.2022, A. C. Cottet and L. P. Dopchiz ( BCRU 5731 About BCRU ) GoogleMaps ; ibid., streamlet mouth zone (64° 15 ′ 23.35 ′′ S; 56°44 ′ 45.90 ′′ W; 2 m. a.s.l.), on unprotected soil, 30.1.2022, A. C. Cottet and L. P. Dopchiz ( BCRU 5742 About BCRU ) GoogleMaps .