Fissidens lagenarius Mitt.
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publication ID |
https://doi.org/ 10.5252/cryptogamie-bryologie2022v43a2 |
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persistent identifier |
https://treatment.plazi.org/id/03AB87C7-FF80-FFA3-502B-FB9ADAEDFDEE |
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treatment provided by |
Felipe |
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scientific name |
Fissidens lagenarius Mitt. |
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Fissidens lagenarius Mitt. View in CoL
( Fig. 11 View FIG )
Pantropical, mammillose species with limbidia restricted to the upper leaves of perichaetial stems and ±divided peristomes with a characteristic ornamentation. OPL lamellae in mid teeth with spaced, irregular oblique to vertical ridges in the mid part of the teeth ( Fig. 11A, B View FIG ). Rare in Africa, known from two collections, both with rather poor peristomes. Part of the above description is therefore based on Neotropical specimens.
Peristome
±erect when wet, stiff, undivided in the two African specimens (undivided or imperfectly and irregularly divided according Pursell (2007) in his neotropical monograph, teeth 66-200 µm long, tooth base 22-33 µm wide, distal parts papillose, often broken off or rudimentary.
Ornamentation
OPL basal ±3 cells with high, smooth trabeculae and thin lamellae that are wider than the IPL-lamellae, in distal direction the trabeculae gradually become indistinguishable, lamellae from about the 4-th cell onwards with an irregular pattern of spaced, vertical to diagonal ridges ( Fig. 11A, B View FIG ), near the apex papillose; IPL in the basal part over a short distance with two columns ( Fig. 11D, F View FIG ), sometimes with a single column throughout ( Fig. 11C View FIG ); the ±5 basal-most cells with high, papillose trabeculae and ±smooth lamellae, more distal lamellae with close, oblique to horizontal close ridges; filaments papillose on both sides, often broken off; IPL thicker than the OPL ( Fig. 11G View FIG ).
Sporophyte
Seta 0.9-1.5 mm, smooth; capsule narrow and long, 0.45- 0.6 × 0.2-0.25mm, exothecial cell columns ±32, the cells oblong, operculum not observed, spores 17.5-20.5 × 16-18.0 µm, finely papillose.
A rather similar peristome is found in the Brazilian Fissidens scindulosus Brugg. -Nann. This species differs from F.lagenarius by scindulose cells with 1-3 scindulae. Scattered or in loose mats, hardly mixed.
Description and illustration
Buck (2003: fig. 10G-I); Pursell (2007: fig. 94); Bruggeman-Nannenga (2011: fig. 26C, E, G, I, J).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.