Monographs Details: Fissidens holstii Broth.
Authority: Buck, William R. 1987. Bryostephane Steereana: A Collection of Bryological Papers Presented to William Campbell Steere On The Occasion of His 80th Birthday. Mem. New York Bot. Gard. 45: 1-749.
Family:Fissidentaceae
Scientific Name:Fissidens holstii Broth.
Discussion:

Fissidens kurandae Broth. & Watts, Proc. Linn. Soc. N.S. Wales 43: 550. 1918, syn. nov.

Fissidens holstii has a hyaline dot in the laminal cells and marginal cells occasionally appear thickened because of a tilting at the edge (sometimes seen in the two new species) or are vaguely and sporadically bistratose due to an oblique division in marginal cells but not conspicuously bistratose as in F. nitens where the thickened border is 2-4 cells wide. Fissidens nitens and F. holstii, judging by their areolation and costal structure, are clearly unrelated to F. sufflatus and F. pseudopallidus.

Fissidens javanicus Dozy & Molk., an Asian species, also has thickened leaf margins, resembling F. sufflatus in the swollen unistratose margin of the vaginant lamina but diflfering from both F. sufflatus and F. pseudopallidus in several features, in particular the bistratose or tristratose apical and dorsal laminal margins and the extremely large hyaline axillary nodules on the stem, characters previously reported by Fleischer (1904), and Iwatsuki and Suzuki (1982).

Fissidens pallidus Hook. f. Sc Wils., an Australian and New Zealand species, has a wide distribution in eastem Australia extending from Tasmania to north Queensland where it is not uncommon on earth banks in rainforest and sometimes occurs in association with F. pseudopallidus. Fissidens pallidus (Figs. 62-67, drawn from type: NEW ZEALAND. North Island, Colenso 391, bm) appears to be very closely related to F. pseudopallidus having sporophytic similarities and resemblances in general habit, areolation and costal structure although the vaginant lamina (Fig. 62) is generally proportionately longer, usually about two-thirds leaf length instead of half or less and the leaf apex usually less tapered (Fig. 63). The most striking differences, however, are in the characters ofthe marginal cells; in F. pallidus the marginal cells (Figs. 64-67) ofthe apical and dorsal laminae are not swollen as in F. pseudopallidus and the vaginant lamina, unlike that of F. pseudopallidus in surface view lacks a broad pale border which, in cross section, is not thickened but tapers to the margin. The spores of F. pallidus are smaller, 7.5-11 µm, than those of F. pseudopallidus which are 12-15 µm.