Brachymenium acuminatum Harv.
  • Icon. Pl.


Cite taxon page as 'WFO (2021): Brachymenium acuminatum Harv. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001154690. Accessed on: 13 Jun 2021'

General Information

Brachymenium acuminatum Harv. in Hook., Icon. Pl. 1: 19. 1836.

Protologue: East Indies, Harvey.

Brachymenium filescens Bartr., J. Wash. Acad. Sci. 21: 292. 1931. Protologue: Costa Rica. Province of Alajuela, Cebadilla, alt. 700 m., Nov. 14, 1928, Valerio 209 (FH, US). 

Plants minute, yellow-green, gregarious or in loose tufts. Stems slender, 2–10 mm long, epidermal cells quadrate, sparsely tomentose at base; rhizoids sparse at base, reddish brown, papillose roughened. Leaves 0.5–0.8 mm long, stiffly erect-appressed to imbricate when dry, concave, ovate to ovate-lanceolate; apices shortly acuminate; margins weakly bordered by long, narrow cells, entire, erect above, slightly reflexed below; costa percurrent to shortly excurrent, ventral superficial cells at base quadrate to rectangular; leaf cells lax and thin-walled throughout, upper cells elongate-rhomboidal, 40–90 x 10 μm, alar cells short-rectangular, 20–30 x 16–20 μm. Dioicous. Setae 10–30 mm long, red. Capsules 1.5–2.0 mm long, red, claviform to elongate-pyriform, constricted at neck, erect; opercula 0.3–0.5 mm long, conic; annuli compound, revoluble; exostome teeth reddish brown, thickly papillose, endostome yellowish, basal membrane to ½ the exostome teeth length, segments rudimentary to absent, cilia rudimentary to absent. Spores 10–14 μm, smooth to obscurely roughened. Calyptra not seen.

  • Provided by: [B].Moss Flora of Central America
    •  

      1. Brachymenium acuminatum Harv. in Hook.   尖叶短月藓   jian ye duan yue xian Icon. Pl. Rar. 1: 19. 1836. Gemmabryum acuminatum (Harv. in Hook.) Spence & Ramsay, Phytologia 87: 65. 2005. Type: East Indies, Harvey s.n.   Plants small, to 5 mm high, grayish green to yellowish green, in dense tufts. Stems short, erect or nearly so, with numerous innovated branches and rhizoids at base. Leaves dense, in multiple rows, imbricately appressed, ovate-lanceolate, keeled, ca. 1.0 mm × 0.5 mm; margins plane, entire or serrulate in the upper part; costae strong, excurrent into long awns; leaf cells thin-walled; alar cells distinctly differentiated, quadrate or shortly rectangular, gradually becoming rhomboidal upwards; apical cells vermicular, thick-walled. Dioicous. Perichaetial leaves triangularly lanceolate, larger than the branch leaves. Setae erect, 8–20 mm long; capsules erect or slightly inclined, pyriform or ovoid; neck short; mouth narrowed; opercula conic, shortly apiculate; endostome segments rudimentary, basal membrane ca. 1/2 the height of teeth; cilia rudimentary or absent. Spores 11–17 µm in diameter.

    • Provided by: [E].Moss Flora of China
      • Source: [
      • 1
      • ]. 

      Diagnostic Description

      The glossy, light green, concave leaves, with lax, elongate upper leaf cells and generally strongly differentiated basal cells will separate G. acuminatum from other species of the genus. Although the leaf is generally concave, above the base, when cut in cross-section the entire lamina is broadly recurved. This is apparently due to a slight thickening of the dorsal cell facies.

    • Provided by: [C].e-Flora of South Africa
      • Source: [
      • 3
      • ]. 

      Morphology

      Plants small, forming loose turfs, light green to yellowish green, glossy; terricolous. Stems (2-)5-10 mm long, sparsely radiculose below; in section cortical cells in 2-4 rows. Leaves erect-appressed, little altered dry, concave; ovate to ovate-acuminate or ovate-lanceolate, 0.5-0.8 mm long; apex acute to acuminate; base flat, not concave; margins erect, entire. Costa short-excurrent, mucro 0.1-0.2 mm long; in section subround, ventral cells 2, large, thin-walled, dorsal substereid band 2 cells thick, dorsal surface cells undifferentiated. Upper laminal cells mostly 6-10: 1, fusiform to linear-rhomboidal, ± sinuolate, (50-)75-150 µm long, 12-18 µm wide, dorsal surface weakly thickened; basal cells generally distinct,quadrate to short-rectangular, 1-2: 1, thin-walled. Perichaetial leaves triangular, ± 1 mm long. Seta (6-)10-15(-22) mm long, yellowish; capsule suberect to inclined or almost horizontal, clavate to cylindrical-pyriform or occasionally smaller and pyriform, 2.5-3.5 mm long, yellowish, neck sulcate, to 1 mm long; exothecial cells subrectangular, walls ± wavy, 1-2 rows of transversely rectangular cells at mouth; peristome teeth 200-300 µm long, endostome with basal membrane 175-200 µm high, segments rudimentary; spores round, 16-18 µm, green, weakly papillose.

    • Provided by: [C].e-Flora of South Africa
      • Source: [
      • 3
      • ]. 

      Plants in loose turfs, yellowish green, glossy. Stems 2-10 mm long. Leaves erect-appressed, concave, ovate to ovate-acuminate, 0.5-0.8 mm long; margins entire; costa short-excurrent. Upper laminal cells fusiform to linear-rhomboidal; basal cells distinct, quadrate to short-rectangular. Capsule inclined to horizontal, clavate to cylindrical-pyriform; endostome segments rudimentary. Recognised by the light green, glossy plants with concave leaves, lax, elongate upper laminal cells and strongly differentiated basal cells.

    • Provided by: [C].e-Flora of South Africa
      • Source: [
      • 4
      • ]. 

      Habitat

      Dry Grassland; Mesic Grassland; Zastron Moist Grassland. On soil or rock.

    • Provided by: [C].e-Flora of South Africa
      • Source: [
      • 4
      • ]. 

      Distribution

      Brachymenium acuminatum has been reported from eastern and southern Africa, South America, India, southeast Asia and Australia. In southern Africa the species is found in the northern, central, southern and eastern Transvaal, Swaziland, Natal and Lesotho. A few specimens have also been collected in the northwestern and southwestern Cape, eastern Orange Free State, central South West Africa/Namibia and Botswana.

    • Provided by: [C].e-Flora of South Africa
      • Source: [
      • 3
      • ]. 

      Distribution Map

       
      • Native distribution
      Found in
      • Southern America Brazil Minas Gerais

        Bibliography

       Information From

      Bryaceae
      World Flora Online Data. 2017.
      • A CC0 1.0 Universal (CC0 1.0).
      Moss Flora of Central America
      http://www.mobot.org/MOBOT/Moss/centralamerica/welcome.shtml
      Moss Flora of Central America. Missouri Botanical Garden. Accessed on Jun. 2020.
      • B Missouri Botanical Garden
      e-Flora of South Africa
      e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
      • C All Rights Reserved
      Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
      http://floradobrasil.jbrj.gov.br
      Brazil Flora G (2014): Brazilian Flora 2020 project - Projeto Flora do Brasil 2020. v393.147. Instituto de Pesquisas Jardim Botanico do Rio de Janeiro. Dataset/Checklist. doi:10.15468/1mtkaw
      • D Group Brazil Flora, REFLORA Program
      Moss Flora of China
      http://tropicos.org/Project/MFC
      Moss Flora of China. Missouri Botanical Garden. Accessed on Jun. 2020.
      • E Missouri Botanical Garden
      World Flora Online consortium
      http://www.worldfloraonline.org/organisation/WFO
      World Flora Online Data. 2018.
      • F CC0 1.0 Universal (CC0 1.0).