Archidium microthecium Dixon & P. de la Varde
  • Ann. Cryptog. Exot.


Cite taxon page as 'WFO (2020): Archidium microthecium Dixon & P. de la Varde. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001192178. Accessed on: 14 Jul 2020'

Diagnostic Description

Archidium microthecium is separated from the closely related A. ohioense on the basis of its narrower and more incrassate lamina cells, long-excurrent costa, and oblong-lanceolate perichaetial leaves.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Morphology

    Plants caespitose, yellow or yellow-green; terricolous. Stems 1-5 mm high, branching by subperichaetial innovations; in section with central strand of collapsed cells, inner cortical cells thin-walled, large, in single row, outer cortical cells smaller, in 1-2 rows. Leaves bract-like below, larger above, erect to erect- spreading, ovate-lanceolate to lanceolate, acuminate, 0.9-1.1 mm long; margins plane, entire. Costa excurrent or forming hair-point; in section round, cells undifferentiated, incrassate or stereids. Laminal cells rhomboidal to fusiform, incrassate; basal cells short-rectangular to quadrate; lower marginal cells rectangular to quadrate. Perichaetia terminal. Leaves erect to erect-spreading, occasionally secund; ovate- lanceolate to oblong-lanceolate, acuminate, 0.8-1.4 mm long; margins entire, plane to faintly recurved above. Costa excurrent as hair-point; in section round, surface cells incrassate or substereids, central cells sub-stereids to stereids. Laminal cells fusiform, shorter above and along margins, 48-88 µm long, walls 3-7 µm wide, lumen 5-9 µm wide; basal cells rectangular, thin-walled, basal marginal cells hyaline. Spores 10-17 per capsule, irregularly rounded, 88-202 µm, smooth to granulose, yellow.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Habitat

    On sandy soils.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Distribution

    This species has been collected in South West Africa/Namibia, Natal and the Kruger National Park in the northeastern Transvaal. The plant also occurs in east Africa and southern and eastern India.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Distribution Map

     
    • Native distribution
    Found in
    • Southern America Brazil Alagoas
    • Bahia

      Bibliography

    • 1 Ann. Cryptog. Exot.
    • 2 van Rooy, J. 1981. Archidiaceae. Fl. S. Africa Bryophyta(1,1): 71 - 81.

     Information From

    Archidiaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    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
    • B 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
    • C Group Brazil Flora, REFLORA Program
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).