NOTEWORTHY LEJEUNEAE FROM FLORIDA 
liferating (so far as observed) ; bracts in one or two pairs, similar to 
the leaves but less widely spreading and with relatively shorter lobes, 
monandrous: capsule about 0.18 mm. in diameter: spores greenish, 
12-20 jjL in short diameter, minutely verruculose: gemmae abundantly 
produced, about 0.05x0.06 mm., composed (normally) of twenty 
cells, each apical quadrant cutting off three segments, margin crenulate 
from projecting cells, the youngest two segments on each side sharper, 
organs of attachment none. [Fig. i.] 
On bark of trees. Florida: Sanford, 1913-1917, S. Rapp. The 
specimen collected in 1 91 5 (September 28), which bears well-developed 
perianths, may be designated the type. The specimen collected in 
1 913 was at first referred by the writer to C. Biddlecomiae and is re- 
ported under this name by Miss Haynes. 
Among the species of Cololejeunea known from Florida, C. Biddle- 
comiae (Aust.) Evans and C. tuherculata Evans agree with C. con- 
tractiloba in having roughened leaves and perianths. In all three 
cases the roughness is due to projecting cell-walls, more or less thick- 
ened at the tips of the projections. It is best marked in C. tuherculata, 
where the lobules as well as the lobes of the leaves and perichaetial 
bracts are usually roughened and where the projections are longer and 
more thickened at their tips. In the other two species the lobules 
are invariably smooth, and the projections are shorter and less thick- 
ened. 
The lobules of the new species are especially interesting because 
they show the features characteristic of the genus in an abridged or 
reduced form. In other words the apical tooth, instead of being two 
cells or more long, consists of a single projecting cell, while the proximal 
tooth is scarcely apparent. The apical tooth is further remarkable 
because it lies in a more ventral plane than the rest of the free margin, 
the hyaline papilla lying in the same plane. In both C. Biddlecomiae 
and C tuherculata the apical tooth is normally two cells long and lies 
in the same plane as the rest of the margin, while the proximal tooth 
is usually distinct. 
Aside frorn the differences just noted C. contractiloha differs from 
C. Biddlecomiae in its smaller size, in its lack of a filiform stylus, and 
in the narrower lobes and lobules of its perichaetial bracts; it differs 
from C. tuherculata in its slightly larger size, in the entire lobules of 
its perichaetial bracts and in the distinct beak of its perianth. Four 
other speceis of Cololejeunea are definitely known from Florida at the 
present time. Since, however, the leaves of all are smooth or nearly 
so, there is little danger of confusing them with the present species. 
