NOTEWORTHY LEJEUNEAE FROM FLORIDAi 
Alexander W. Evans 
Our knowledge of the Hepaticae occurring in Florida has been 
materially increased during the past few years. This is due in great 
part to the careful collections made by Mr. Severin Rapp in the 
vicinity of Sanford, Orange County, although Dr. J. K. Small, Mr. N. 
L. T. Nelson and other collectors have made notable discoveries. In 
1915 Miss CaroHne C. Haynes^ published a list of sixty-four species 
which Mr. Rapp had found, including twenty-four members of the 
Lejeuneae. In the present paper six additional Lejeuneae are noted. 
Four of these are apparently undescribed, although one has already 
been reported from Sanford under another name. One of the re- 
maining species has been previously reported from Cuba and the 
other from Jamaica. Of the new species two, according to our present 
knowledge, are endemic to Florida. The number of Lejeuneae now 
known from Sanford is twenty-nine; from the entire state of Florida, 
forty-four; from the entire United States, forty-eight. 
I. Cololejeunea contractiloba sp. nov. 
Plants very delicate, pale green, scattered or growing in loose 
mats: stems prostrate, 0.03 mm. in diameter, irregularly and some- 
times abundantly branched, the branches widely spreading, similar 
to the stem: leaves distant to subimbricated, obliquely to widely 
spreading, the lobe plane or slightly convex, sometimes inflexed at the 
apex, ovate to ovate-lanceolate, when well developed 0.2-0.3 mm. 
long and 0.12-0. 18 mm. wide, but often considerably smaller, gradually 
narrowed to an acute apex tipped with a single cell, both dorsal and 
ventral margins rounded in the basal half and straight or nearly so 
in the apical half, crenulate or denticulate from projecting cells; 
lobule often rudimentary, when well developed broadly ovate, about 
0.13 mm. long and o.ii mm. wide, strongly inflated throughout, apical 
tooth consisting of a single rounded projecting cell, lying in a more 
ventral plane than the rest of the free margin and bearing the hyaline 
papilla at its dorsal base, proximal tooth scarcely evident, consisting 
of a rounded cell separated from the apical tooth by a single cell, sinus 
^ Contribution from the Osborn Botanical Laboratory. 
2 Bryologist 18: 19-22. 1915. 
131 
