Fig. 9, 89.
Holotype: Microdendron sinense Brotherus, Svnib. Sin. 4: 137. t. 5. f. I4. 1929.
Microdendron sinense Broth, is known only from the original locality in the northwest corner of Yunnan, at the Sino-Tibetan border. The type collection (H!) bears young setae, but the capsule is unknown.
The leaves of Microdendron are those of a Pogonatum, but the habit is like
that of Dendroligotrichum. The aspect of the cross-section of the leaves, with its
vertically elongated ventral cells, is like that of Dendroligotrichum and certain
Pogonatum species, as well as Lyellia, Bartramiopsis, and Alophosia. On the
basis of its gametophytic characters, Microdendron seems to strengthen the connection
between Dendroligotrichum and Pogonatum, although this will be confirmed
only when the sporophyte is discovered.