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ALEXANDER W. EVANS 
In many species of Lejeimea the female branches vary greatly in 
length. This is strikingly true in the case of L. minutiloha Evans, a 
species of the West Indian lowlands, closely related to L. cladogyna. 
A female branch in this species is sometimes greatly elongated and 
sometimes so short that it bears a single vegetative leaf and a single 
underleaf in addition to the bracts and bracteole. Between these two 
extremes all intermediate conditions occur. In L. cladogyna the female 
branches, so far as observed, are always very short and conform to the 
second of the two extremes noted under L. minutiloha. It would 
perhaps be premature to state that this condition is absolutely con- 
stant, but it is certainly predominant, and it therefore seems justi- 
fiable to regard it as one of the distinctive characters of the species. 
In size and in general habit L. cladogyna and L. minutiloha resemble 
each other very closely, and the inflorescence in both species is autoi- 
cous. In L. cladogyna, moreover, the lobule is usually reduced to a 
minute basal fold. While, however, this condition seems to be con- 
stant in L. minutiloha, inflated lobules of the usual Lejeunea type are 
occasionally produced in L. cladogyna, although many plants seem to 
lack them completely. The new species is further distinguished by 
its underleaves, bracts and perianths. The underleaves, even, when 
well developed, are only a little broader than the stem and the divi- 
sions are rarely more than four cells wide at the base; the lobules of 
the bracts are highly connate with the lobes and sometimes approxi- 
mate them in length; the perianth is rounded at the apex, and the 
five keels extend to the middle or beyond. In L. minutiloha the 
underleaves are often twice as broad as the stem and the divisions 
may be six or more cells wide ; the lobules of the bracts are less highly 
connate with the lobes and much shorter, appearing like small basal 
appendages; the perianth is truncate or slightly retuse at the apex, 
and the keels are restricted to the apical portion. 
In L. glaucescens Gottsche, another West Indian species found also 
in Florida, the female branch seems to be constantly very short, just 
as in L. cladogyna, and the two species agree further in their autoicous 
inflorescence and in the fact that their lobules are often poorly de- 
veloped. L. glaucescens, however, is a larger and more delicate species 
than L. cladogyna and has larger leaf-cells, the median cells of the 
lobes averaging about 33 in length. It is further distinguished by 
its sharper lobules and by the sharper divisions of its bracteoles. 
Two other species of Lejeunea, L. floridana Evans and L.flava (Sw.) 
