610 Evans: New West INDIAN LEJEUNEAE 
a little shorter than the lobe; bracteoles similar to the underleaves 
but smaller, restricted to the base of the inflorescence: capsule 
about 0.3 mm. in diameter; spores greenish, minutely verruculose, 
irregular in form, about I2u in short diameter; elaters about Ou 
in diameter, with a single spiral. (PLATE 45, FIGURES 17-27.) 
On bark of trees. Jamaica: Cinchona, L. M. Underwood 
(495), February 1903; W. R. Maxon (7361), April 1903; Evans 
(243 in part), July 1903. No. 1361 may be regarded as the type. 
The microphyllous branches mentioned in the description are 
not abundant in the material examined, and little can be said in 
regard to their significance. In typical cases a branch of this char- 
acter (FIGURE 18) exhibits the peculiarities associated with the genus 
Microlejeunea. The lobes of the leaves are ovate and suberect 
and measure only 0.18 X 0.11 mm., while the lobules are relatively 
large and measure about 0.13 X 0.1mm. Such leaves are not very 
different from the rudimentary leaves found at the base of an 
ordinary branch, and it is possible that a microphyllous branch is 
simply one in which juvenile characters persist. Although similar 
branches have not yet been observed in other members of the 
genus, their occurrence would not be surprising. 
A short time ago the writer proposed a new species of Rectole- 
jeunea from the Bahama Islands, under the name R. Brittoniae,* 
and pointed out its close relationship to the widely distributed 
R. phyllobola (Nees & Mont.) Evans.t The new plant from 
Jamaica belongs in the same group of species. In its dioicous 
inflorescence it agrees with R. Brittoniae and differs from R. phyllo- 
bola; in the restriction of its perigonial bracteoles to the base of the 
spike it agrees with R. phyllobola and differs from R. Brittoniae. 
Vegetative reproduction is apparently of rare occurrence in R. 
Maxonti. When it takes place it is by means of caducous leaves, 
just as in the other known members of the genus, but these leaves 
are not borne on specialized shoots. In this respect, as well as in 
most of the characters drawn from the leaves, leaf cells, and 
perianths, it agrees further with R. Brittoniae and R. phyllobola. 
The underleaves, however, afford a few additional differences. 
el ee ae 
* Bull. Torrey Club 38: 209. pl. 9. f. 1-12. 1o01T. 
Tt For a discussion of the genus Rectolejeunea see Evans, Bull. Torrey Club 33* 
I-16. 21. 7,2. 1006. 
