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Published In: Phytologia 41: 21. 1978. (Phytologia) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 1/27/2013)
Acceptance : Accepted
Project Data     (Last Modified On 10/6/2017)
Plant Category: Mosses
country distribution: Venezuela, Colombia, Ecuador, Peru, Bolivia, NW Argentina
EcoRegions: Páramo, Puna, Open montane, Dry Inter-Andean Valleys
elevation: 500-1000, 1000-1500, 1500-2000, 2000-2500, 2500-3000, 3000-3500, 3500-4000, 4000-4500, 4500-5000
substrate: soil, rocks
frequency: common

Notes     (Last Modified On 10/6/2017)
Ecology: Open montane to páramo and puna; on soil and soil covered rocks. Elevation: 500-4855 m (Venezuela: 1650-4150 m, Colombia: 2770-3700 m, Ecuador: 3300-4300 m, Peru: 500-4855 m, Bolivia: 2250-4905 m). Distribution: North, Central and South America, Europe, South Africa and Australasia.
Didymodon australasiae is characterized by the absence of a stem hyalodermis (rarely present in patches), generally lanceolate to oblong-lanceolate leaves to 2.5 mm, bistratose marginal cells, quadrate upper adaxial costal (epidermal) cells, pluripapillose upper lamina cells (papillae simple to bifurcate), quadrate to short rectangular basal cells, and undifferentiated marginal basal cells (similar to basal cells), ± isodiametric. Synonyms include Barbula decolorans Hampe, B. ecuadoriensis Broth., B. linguaecuspis Broth., Didymodon subtophaceus R.S. Williams.
Both D. australasiae and D. umbrosa (the latter as a variety of the former in some treatments) have been treated as Trichostomopsis. These two taxa can be separated by the following key (Jiménez et al., 2005):
1. Stem hyalodermis absent or occasionally present in patches; leaves oblong-lanceolate to lanceolate, ovate or triangular; basal cells at margin not or weakly differentiated, quadrate to short rectangular … Didymodon australasiae
1. Stem hyalodermis present; leaves long-lanceolate; basal cells at margin distinctly differentiated, long rectangular … Didymodon umbrosa
Didymodon australasiae se caracteriza por la ausencia de hialodermis en el tallo (rara vez presente en parches), hojas generalmente lanceoladas a oblongo-lanceoladas hasta 2.5 mm, células marginales biestratificadas, células adaxiales superiores de la costa cuadradas (epidérmicas), células superiores de la lámina pluripapilosas (papilas simples a bifurcadas), células basales cuadradas a corto rectangulares, y células basal marginales indiferenciadas (similares a las células basales), ± isodiamétricas.
Tanto D. australasiae como D. umbrosa (la última es una variedad de la primera según algunos tratamientos) han sido consideradas como Trichostomopsis. Ambos taxa pueden ser separados mediante la siguiente clave (Jiménez et al., 2005):
1. Tallos sin hialodermis u ocasionalmente presente en parches; hojas oblongo-lanceoladas a lanceoladas, ovadas o triangulares; células basales en el margen no o débilmente diferenciadas, cuadradas a corto rectangulares … Didymodon australasiae
1. Tallos con hialodermis; hojas largo-lanceoladas; células basales en el margen conspicuamente diferenciadas, largo rectangulares … Didymodon umbrosa



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