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Frullania hattorii &. B. Konrat, raggins
Life   Plantae   Marchantiophyta   Jubulaceae   Frullania

Frullania hattorii
© Matt von Konrat, 2004 · 2
Frullania hattorii

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Frullania hattorii, stem
© Matt von Konrat, 2004 · 2
Frullania hattorii, stem
Frullania hattorii, branching
© Matt von Konrat, 2004 · 1
Frullania hattorii, branching
We are not aware of any other Frullania species with this form of cell ornamentation on the leaf lobe. There are several other Frullania species, e.g., F. junghuhniana var. minutissima (also from subg. Microfrullania), with a similar surface ornamentation, but in these species ornamentation is restricted to the leaf-lobule, and is never present on the leaf-lobe. A mammillose surface ornamentation on the lobule is also encountered in at least three other subgenera, including subg. Diastaloba (e.g., F. alte-mammillata Hatt.), subg. Homotropantha (e.g., F. sarawakensis Hatt.), and subg. Mammillosae (e.g., F. thiersiae Hatt.).

In the field, both F. hattorii and F. aterrima can typically be separated from F. rostrata by comparing the contrast in colour between the leaf-lobule and leaf-lobe. The lobules of F. hattorii are almost always darker in colour than the other organs (in part due to heavily pigmented cell walls) whereas the lobules of F. rostrata are similar in colour to the other organs. Frullania hattorii can immediately be distinguished from F. aterrima and all other Australasian species by the mammillose dorsal lobe surface, bearing a single, 48 m long, conical to conoidal protuberance per cell. By contrast, F. rostrata has underleaves that typically have entire lateral margins, but occasionally some phenotypes have small angulations or with one pair of very small teeth, and may appear superficially similar to F. hattorii.

This species is placed in subgenus Microfrullania (R. M. Schust.) R. M. Schust. with which it shares several common features, including, the obliquely spreading lobules and the subequally thickened cell walls of the leaf lobe. Frullania aterrima is a morphologically similar Australasian species, and F . rostrata is a common species throughout Tasmania, Australia, and New Zealand, and some phenotypes of F. rostrata may be confused with this taxon. However, no other Frullania species in Australasia has the distinct form of cell ornamentation on the leaf lobe.

Geographic distribution
Apparently endemic to Tasmania, known from three localities. At present, F. hattorii is only known from three localities in Tasmania: Hartz Mountains National Park, Mt Field National Park, and southwest of Nietta (Fig. 4). Further collections are required to establish the full extent of its distribution, and searching in similar habitats on mainland Australia may also be useful. Based on the limited collections thus far it appears that this species occurs in moderate to high light environments at mid to high altitude.

von Konrat, M. and Braggins, J. E. (2003). A new and unusual species of Frullania (Jubulaceae) from Tasmania, Australia. New Zealand Journal of Botany. 41: 55-62.

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