Plagiochasma appendiculatum Lehm. & Lindenb.
  • Nov. Stirp. Pug.


Cite taxon page as 'WFO (2020): Plagiochasma appendiculatum Lehm. & Lindenb. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001201538. Accessed on: 03 Jul 2020'

Morphology

Shiny, areolate, air pores small, faintly visible, margins purple, scalloped and slightly undulate; when dry, margins tightly incurved. Branches simple or once, sometimes twice furcate, rarely articulate with apical or ventrolateral innovations, broadly Ungulate, 10-20 mm long, 5-8 mm wide, 750-925 µm thick medianly, in section 6-8 times wider than thick, apex notched with large, orbicular appendages recurved over edge; groove absent, thallus margins acute, thin; flanks sloping very obliquely; ventral face medianly keeled, green. Scales in 2 ventral rows, body up to 1250 µm long, margins occasionally with projecting papillae, base flatly arched, ± 1100 µm wide, gradually narrowed above, deeply constricted and folded where joined with large, mostly single, orbicular, often decolorate appendage, 750 µm long, 550 µm across widest part, margins smooth with 1 or 2 rows of small rectangular cells, alternating with somewhat larger cells, some smaller oil cells scattered throughout scale. Dorsal epidermal cells unistratose, hyaline, thin-walled, thickened at corners, polygonal, 22.5-42.5 x 15.0-27.5 µm, smooth externally; air pores slightly raised, simple, 7.5-10.0 µm wide, surrounded by innermost ring of tiny, collapsed cells, then by 2 (or 3 partly) concentric rings of 5 or 6 larger cells in each, radial walls not thickened. Assimilation tissue 375-500 µm thick, air chambers empty, in several storeys, bounding walls chlorophyllose; storage tissue well developed; oil cells scattered throughout tissues. Monoicous, but male and female receptacles often on separate plants. Androecia medianly on leading branch near apex, sessile cushions, oval, horseshoe- or heart-shaped, base encircled by blunt, hyaline or partly purple paleae, 550-580 x 130-180 µm. Gynoecial receptacles medianly along main branch, single or several in acropetal sequence, initially enclosed by arching, hyaline paleae, ± 850 x 120 µm; carpocephala 2 x 2 mm when 4 lobes present. Stalk 1.25-2.00 mm long, ± 750 µm wide. Involucre bilabiate. Sphorophyte with capsule ± globose. Spores 75-85 µm diam., triangular-globular, polar, light brown, translucent; wing ± 10 µm wide, porate at corners, margin undulate, finely crenulate; ornamentation similar on 2 faces; distal face with 5 alveoli across, ± 22 µm wide, walls finely granular; proximal face with very narrow triradiate mark, each of 3 facets with 6 or 7 alveoli, walls wide and studded with granules. Elaters pale brown, 187-240 µm long, 10 µm wide in middle, tapering toward ends, 5 µm wide, bi- or trispiral.

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

    Distribution

    Afghanistan, Burma, Celebes, China, Taiwan [Formosa], India, Kashmir, Nepal, Pakistan, Philippines, Sikkim and Vietnam. It is also known from the Arabian Peninsula, Socotra and Yemen, and in Africa from Ethiopia, Kenya, Tanzania and Zimbabwe.

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

      Bibliography

    • 1 Nov. Stirp. Pug.
    • 2 Perold, SM. 1999. Hepatophyta. Fl. S. Africa (1,1): 1 - 252.

     Information From

    Aytoniaceae
    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).