Andreaea mutabilis Hook.f. & Wilson

* Andreaea mutabilis Hook.f. & Wilson View in CoL

( Fig. 4 View FIG )

SPECIMEN EXAMINED. — Türkiye • Artvin province, Borçka district, Balcıköy Plateau , power plant surroundings on rock; 2095-2150 m alt.; 41°56’36.2”N, 41°20’35.7”E; 22.VI.2022 GoogleMaps • Borçka district, Beyazsu Plateau , on rock; 2356 m alt.; 41°57’36.1”N, 41°21’18.4”E; 23.VI.2022; leg. N. Batan, H. Erata, det N. Batan, H. Erata, KTUB [ KTUB1628 ]; duplicate in Erata 1217 (Herb. Erata) GoogleMaps .

ECOLOGY. — Andreaea mutabilis typically grows on dry to wet, exposed acidic rocks, It is also found on periodically wet acid boulders crags or rubble, rarely on thin soil over rocks ( Dierssen 2001; Smith 2004; Frey et al. 2006).

DISTRIBUTION. — Andreaea mutabilis is distributed across various regions, including Europe (Fareo Islands, Great Britain, Andorra, France, Spain); Asia ( Taiwan, China, and Malaysia); the Americas (North and South America); Oceania (New Guinea, Australia, Tasmania, and New Zealand). ( Chiang 1998; Gao & Crosby 1999; Smith 2004; Hodgetts & Lockhart 2020).

DESCRIPTION

Plants small, 1.0- 1.2 cm high, reddish to black cushions. Shoots 0.4-1 cm high. Leaves 0.4-0.7 mm long, erect-spreading and straight, lanceolate, widest above the base, acuminate to acute apex. Costa absent. Leaf margins entire, incurved. Basal laminal cells rectangular, basal marginal cells isodiametric, median laminal cells rounded-quadrate or rhomboid. Perichaetial leaves oblong-lingulate, acuminate ( Murray 1988; Smith 2004; Frey et al. 2006).

Andreaea mutabilis closely resembles Andreaea sinuosa B.M. Murray but can be distinguished by its quadrate basal laminal cells and non-sinuose basal cells. Additionally, A. mutabilis differs from Andreaea rupestris Hedw. by having isodiametric basal marginal cells, less pitted basal cell walls, and quadrate basal laminal cells, whereas A. rupestris has rectangular basal laminal cells and laminal papillae. Andreaea mutabilis also bears similarity to Andreaea alpestris , but differs in its minimally sheathing leaf bases, often displaying a patch of yellow cells at the base, with basal cells that are scarcely pitted. Its basal laminal cells are rectangular, and marginal cells are quadrate, measuring 0.8-1 mm in length and 0.3-0.4 mm in width ( Chiang 1998; Murray 1988; Smith 2004; Frey et al. 2006; Zander 2007).

REMARKS

Andreaea mutabilis was last assessed for The IUCN Red List of Threatened Species in 2016, where it is classified as Least Concern (LC) ( Hodgetts et al. 2019; The IUCN Red List of Threatened Species 2019: e.T83659827A87792052 accessed on 11 July 2024).