Breutelia diffracta Mitt.
  • J. Proc. Linn. Soc., Bot.


Cite taxon page as 'WFO (2019): Breutelia diffracta Mitt. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001155649. Accessed on: 15 Nov 2019'

Diagnostic Description

Specimens of B. diffracta are quickly identified by their large size and strongly plicate leaves with lamina reflexed above a differentiated, ± sheathing base. The plications are so pronounced that the lamina is wavy in cross-section. The other southern African species of Breutelia have only weak plications that are restricted to the leaf base.

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

    Morphology

    Plants medium-sized to large, frequently robust, forming large, loose cushions, yellowish green, brownish below; terricolous or saxicolous. Stems 50-150(-200) mm tall, irregularly branched, generally with dense reddish brown tomentum on lower stem; in section elliptical, central strand present, small, inner cortical cells in 8-12 rows, thin-walled, smaller and more strongly thickened toward outside, outer cortical cells in 2-3 rows, stereids, reddish, epidermal cells thin-walled, fragile, outer wall quickly broken away resulting in fluted stem. Leaves ± distant, lamina widespreading to squarrose above erect, sheathing base, weakly contorted dry, strongly plicate from base to upper leaf; long-acuminate above short- obovate base, 3.0-4.0(-4.5) mm long, 1.0-1.5 mm wide at shoulders; lamina occasionally with small bistratose patches not associated with plications; margins plane, serrate to strongly serrate above base, occasionally with double teeth. Costa short-excurrent, serrate, superficial cells rectangular, smooth, incrassate; in section elliptical, guide cells large, incrassate, ventral stereid band 1-2(-3) cells thick, exposed, occasionally substereids, dorsal stereid band 3-4 cells thick, occasionally substereids, dorsal surface cells undifferentiated or frequently substereids. Laminal cells rectangular, weakly thickened, ends rounded, 5-7:1, cells rarely strongly thickened, cells prorate at proximal ends, or occasionally with single papillae at proximal end; inner basal cells moderately differentiated, rectangular, 10:1, strongly thickened at insertion; alar and lower marginal cells distinct, broad and lax. Dioicous. Perichaetia lateral through innovation. Seta 10-15 mm long, red-yellow; capsule inclined, urn globose to ovoid wet, urceolate and striated dry, 3-4 mm long; exothecial cells quadrate to hexagonal, weakly thickened, yellowish, 6 rows at mouth transversely rectangular, reddish; stomata not seen; peristome absent; operculum convex; calyptra not seen; spores subround, 30-40 µm, surface with irregular wartlike plates, red-brown.

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

    Habitat

    In wooded kloofs and open mountain slopes.

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

    Distribution

    The species is known from central and southern Africa. In the Flora area B. diffracta is collected in the Drakensberg of Natal, Lesotho, Transkei and the eastern and northern Transvaal.

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

      Bibliography

    • 1 J. Proc. Linn. Soc., Bot.
    • 2 Magill, RE. 1987. Mniaceae to Bartramiaceae. Fl. S. Africa (1,2): 395 - 438.

     Information From

    Bartramiaceae
    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
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).