7 / 
— 
tooth of the lobule usually consists of a row of two cells; the inflorescence is often 
autoicous; and the five-keeled perianth is obovoid or oblong. In all these re- 
spects it agrees with C. tuberculata. The roughness of the leaves, however, is 
due to low rounded or conical protuberances, the wall being thin throughout or 
only slightly thickened at the apices of the projection; it often involves only a 
part of the lobe, the basal region being usually quite smooth; and it never in- 
volves the lobules at all, not even those of the perichaetial bracts. In C. Biddle- 
comiae, moreover, a well-developed filiform stylus is present at the base of the 
lobule, and the perianth has a distinct beak; whereas in C. tuber culata no trace of 
a stylus can be demonstrated, and the perianth is destitute of a beak. 
The brief account of the gemmae included in the description must be ac- 
cepted with some reservation because it is based on only three examples, two of 
which were immature and the third (Text fig. 9) somewhat deformed. One of 
the immature gemmae was symmetrical, showing eight cells on each side of the 
median line, so that the right hand side of the figure probably represents the 
normal structure. On the left hand side the apical cell has cut off an additional 
segment, which has divided in the usual way by a periclinal wall, thus increasing 
the number of cells on that side to ten. Nothing is said in the description about 
organs of attachment and none were found on the two immature gemmae. The 
one figured, however, «• showed two such organs of attachment in the basal quad- 
rants. In all probability the upper cell on the left hand side of the median wall 
would have formed organs of attachment also, if it had developed normally. 
Under these circumstances the gemma would have been essentially like that of 
the Porto Rican Aphanolejeunea exigua Evans, a description of which, with a 
figure, has already been published. 1 
7. Aphanolejeunea sicaefolia (Gottsche) Evans, Bull. Torrey Club 38 : 
277. pi. 12, f. 17-26. 1911. Lejeunea ( Cololejeunea ) sicaefolia Gottsche; 
Stephani, Hedwigia 27 : 290. pi. 12, f. 21-24. 1888. 
Collected in March, 1915, on Timms Hammock (No. 5287) and in pinelands 
about Nixon-Lewis Hammock, Dade County, Florida, on leaves of Trichomanes 
Krausii, by J. K. Small and C. A. Mosier. New to the United States; previously 
known Cuba, Porto Rico, and Trinidad. The Florida specimens are poorly 
developed, the largest leaves measuring only 0.27 mm. in length instead of 0.4 
mm. as in more typical material. Probably on account of the poor development 
of the plants the lobes of the leaves are acute rather than acuminate, but in 
spite of this slight deviation from the typical condition, the agreement in habit, 
in cell-structure, and in the characteristics of the lobule is so complete between 
the material from Florida and the West Indian specimens, that they can safely 
be referred to the same species. 
The gemmae of A. sicaefolia have not yet been described, although the 
plants from Porto Rico showed that these structures were developed by the 
species. In Small’s specimens a very few gemmae are present. They measure 
about 0.07 x 0.055 mm. and agree in all essential respects with those of A. exigua 
and (presumably) with those of Cololejeunea tuber culata. In other words the 
gemma consists of sixteen cells, three of which develop organs of attachment, 
while five of the marginal cells project as blunt teeth. 
1 Bull. Torrey Club 38 : 281, 284. pi. 12, f. 10. 1911. 
