Evans: NOTES ON GENUS HERBERTA 213 
larly toothed near the base, the teeth mostly two to five on each 
side, sometimes small, sometimes larger and lobe-like; vitta in- 
distinct even in the basal region, extending into the divisions but 
soon coming to an end, undivided portion about 0.25 mm. long 
and 0.35 mm. wide; cells of vitta mostly 40-70 X 18 yw in the 
basal portion and 30-40 X 16 y in the divisions, marginal cells 
in the basal portion about 14 uw in diameter, cells between margin 
and vitta about 16 pw in diameter; thickenings distinct in the ver- 
tical walls, mostly 4-6 » wide; cuticle distinctly striolate-verru- 
culose, especially near the base: underleaves similar to the leaves 
but shorter and more symmetrical: inflorescence unknown. 
The following specimens have been examined: 
AustrRiA (TrRoL): Kleiner Rettenstein near Jochberg, A. 
Sauter (distributed as Sendtnera Sauteriana in Rabenhorst’s Hep. 
Europ. 33a); near Kitzbiihel, August, 1882, J. Breidler; Ross- 
kogl, F. Arnold (distributed as Sendtnera Sauteriana in Gottsche 
& Rabenhorst’s Hep. Europ. 422); Sellraintal, August, 1912, H. von 
Handel-Mazzetti (distributed as H. straminea in Schiffner’s Hep. 
Europ. Exsic. 468). 
Miiller and other writers cite the species from Bavaria and 
Salzburg, as well as from Tirol. 
The present species bears a strong resemblance to the true 
H. adunca and it is not at all surprising that botanists have some- 
times had difficulty in distinguishing them. Both normally grow 
in broad mats, their color is much the same except for the fact 
that H. Sendtneri seems never to be tinged with red or purple, 
their leaves are equally imbricated and divided to about the same 
extent, their divisions are less curved than in most species of the 
genus, and the vitta is poorly defined in both, the branches coming 
to an end far below the apices of the leaves. At the same time 
they exhibit excellent differential characters. The leaves in 
H. Sendtneri are relatively broader than in H. adunca, the same 
thing is true of the leaf-divisions, and the thickenings in the leaf 
cells are less conspicuous, those in the vertical walls being only 
about half as wide. The most striking differences between the 
two species, however, are to be found in the basal teeth. In 
H. adunca, as already noted, basal teeth are either absent alto- 
gether or else occur as a rare abnormality. In H. Sendineri they 
form a conspicuous feature of the species. It is true that they 
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