122 
Salmon. — On the Genus Fissidens. 
limbo bistratoso e cellulis parenchymaticis incrassatis composite, 
nervo crasso flavo-rufescente subflexuoso infra summum apicem 
evanescente; laminae verae apice inaequales ad medium folii pro- 
ductae, insertionem versus raptim angustatae ; lamina dorsalis ad 
basin nervi rotundate enata ; cellulae parvae, circiter io/x diam., 
rotundato-4-6-angulatae, pellucidae, laeves. 
Planta feminea sterili similis, sed foliis 4-6-iugis remotioribus 
parum maioribus, foliis perichaetialibus caulinis similibus, paraphysibus 
nullis. 
Caetera ignota. 
Patria. Natal, Inanda (Rehmann, Muse, austr.-afric. 1875-77, 
No. 289). 
F. Holstii, Broth., Engl. Bot. Jahrb., xx, p. 18 1 (1895), habitu 
simillimus, sed foliis nitidis minus acutis, marginibus subintegris plus 
incrassato-limbatis, nervo flavo-rufescente differt. 
F. nitens, although published in Rehmann’s Exsicc. (1875-77), 
does not appear to have been hitherto described. The shining 
appearance of F. nitens is apparently due to the presence of 
prominent oil guttulae in the leaf-cells. These guttulae, at first 
sight, look very like papillae or warts, but the cells are quite 
smooth. 
F. : nitens , Rehm. var., neglectus var. nov. (Figs. 75, 76). 
Flavo- virens, flaccidior, haud nitidus. Folia latiora, marginibus 
ubique incrassato-limbatis; limbus bistratosus, in laminis veris latus, 
e cellulis prosenchymaticis inergssatis, in laminis aliis e cellulis 
parenchymaticis incrassatis, compositus ; nervo flavo-virente. 
Patria. Africa ; Lutindi, Usambara (C. Holst, FI. von Usamb., 
No. 3472) [inter F. Holstii \ Broth., et F. Usambarico , Broth.]. 
F. Holstii and F. nitens and its variety are closely allied plants. 
The leaves of F. Holstii are described by Brotherus as ‘ elimbata,’ 
but authentic specimens in the Kew Herbarium (C. Holst, Flora von 
Usamb., No. 3472) have the apical lamina here and there incrassate- 
limbate, just as in F. nitens , only more sporadically. 
F. nitens , var. neglectus , is known at once by the broad limb of the 
vaginant laminae, but in other respects is somewhat intermediate, 
agreeing with F. Holstii in colour and habit, and with F. nitens in 
the subentire leaves with thickened margins. F. Holstii is distinct 
