Trichostomum brachydontium Bruch

Variable crisp-moss (en)

Species

Bryophytes > Pottiales > Pottiaceae > Trichostomum

Characteristics

Plants medium-sized, caespitose, dark green to yellow-green; terricolous or saxicolous. Stems 4-26 mm tall; in section round, central strand present, frequently large, cortical cells ± incrassate, smaller toward margin, occasionally stereids; axillary hairs 8-12 cells long, hyaline throughout. Leaves incurved, appressed to crisped dry, widely spreading wet; narrowly spathulate to elliptical or oblong, 2.5-3.5 mm long; apex broadly acute to obtuse, cuspidate; margins plane, entire. Costa short-excurrent, ventral superficial cells quadrate, papillose, dorsal superficial cells rectangular, smooth; in section semicircular to subround, guide cells 4, ventral stereid band strong, 2-3 cells thick, ventral surface cells similar to laminal cells, dorsal stereid band strong, 3-4 cells thick, dorsal surface cells substereids or differentiated only at insertion of lamina. Upper laminal cells quadrate to subquadrate, incrassate, papillae numerous, low, blunt, scattered over lumen; marginal cells generally papillose; basal cells rectangular, hyaline, smooth, thin-walled, junction with laminal cells ± straight across leaf. Dioicous. Perichaetia terminal, leaves undifferentiated. Seta 5-0 mm long, yellowish; capsule short-cylindrical, 1.5 mm long; peristome absent or rudimentary; operculum rostrate, 1 mm long; calyptra cucullate; spores round, 15-17 µm, papillose.
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Stem rounded-pentagonal in section. Leaves flattened, ovate to elliptical, distal margins plane or weakly erect, entire, not bordered; apex rounded or rounded-acute, plane to weakly concave, keeled or cucullate; basal cells evenly differentiated across leaf base or as a U, only weakly running up margins if at all, not distinctly enlarged submarginally; distal laminal cells pluripapillose with low papillae; mucro short-conic to stout and narrowly tapering, of 3-6(-10 or more) cells. Sexual condition dioicous. Peristome teeth absent, rudimentary or short-lanceolate.
Plants caespitose. Stems 4-26 mm long, central strand present. Leaves incurved, crisped when dry, widely spreading when wet, narrowly spathulate to elliptical or oblong, 2.5-3.5 mm long; apex acute to obtuse, cuspidate; margins plane; costa short-excurrent, with stereid bands. Upper laminal cells subquadrate, incrassate, papillose, basal cells rectangular, hyaline, smooth. Capsule short-cylindrical, peristome absent or rudimentary.
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Foliage retention deciduous
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Mature height (meter) 0.0 - 0.03
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Environment

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Soil humidity 1-6
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Hardiness (USDA) 9-12

Usage

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Cultivation

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Distribution

Trichostomum brachydontium world distribution map, present in Brazil and South Africa

Identifiers

LSID 35125621
WFO ID wfo-0001160667
COL ID 58KX9
BDTFX ID -
INPN ID 5353
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Barbula sparsifolia Trichostomum ayresianum Trichostomum leikipiae Pottia afrophaea Pottia compacta Pottia gymnostomoides Trichostomum oblongifolium Trichostomum trirete Tortella spathulata Barbula nana Barbula planifolia Trichostomum brachydontium Trichostomum flavescens Weissia perviridis Pottia zeyheri Hyophila lombokensis Hyophila mexicana Hyophila usambarica Trichostomum novogranatense Trichostomum mutabile

Lower taxons

Trichostomum brachydontium subsp. cuspidatum Trichostomum brachydontium subsp. mutabile Trichostomum brachydontium var. cophocarpum Trichostomum brachydontium var. cylindricum Trichostomum brachydontium var. devonicum Trichostomum brachydontium var. longifolium Trichostomum brachydontium var. nigroviride Trichostomum brachydontium var. sibiricum Trichostomum brachydontium var. unguiculatum Trichostomum brachydontium var. robustum