Evans: HEPATICAE OF PuERTO Rico 267 
quoted under Lejeunea marginata as a synonym and the descrip- 
tion of the species is amplified so as to include two distinct varie- 
ties, one without underleaves and the other with duplicated under- 
leaves. Under the first variety the two Mauritian plants men- 
tioned above are cited; under the second, a single plant from 
Guadeloupe. The specimen of this second variety in the Linden- 
berg herbarium consists of two stems, which clearly belong to 
the genus Diplasiolejeunea, so that the true L. marginata was 
known to the authors of the Synopsis from Mauritius only. Later 
reports of L. marginata from the American tropics are also open 
to suspicion. In addition to the report from Puerto Rico, which 
has already been disposed of, Gottsche* notes the occurrence of 
the species in Mexico and Venezuela, and Stephani cites a specimen 
from Mexico. The plants quoted by Gottsche are referred by 
him to his variety Liebmanniana, in which the hyaline cells of 
the leaves are said to be restricted to the apex, so that they are 
apparently distinct from the true L. marginata and also from L. 
planifolia of the present paper. The Mexican specimen which 
Stephani mentions was collected by Liebmann at Mirador and was 
referred by Gottsche to Lejeunea cardiocarpa Mont. Apparently 
Stephani has since doubted his determination, because in a recent 
letter he states that he has seen no L. marginata from America, 
implying at the same time that its discovery here would not be 
surprising. On the whole, however, in view of the conflicting 
evidence, it seems wisest to consider that the true L. marginata is 
not yet known on this side of the Atlantic. Even in the Old 
World its distribution is very inadequately understood. It was 
reported from Java and Sumatra by Sande Lacoste and from 
Madagascar by Gottsche, but these seem to be the only new 
published records. 
The writer has been unable to obtain plants of L. marginata 
for study and has again been dependent upon a drawing kindly 
sent by Stephani. It was made from an African specimen received 
from Gottsche and presumably of his determination. In this 
drawing, which shows a portion of the stem with three leaves, the 
lobule is of the typical Leptocolea type. It has a strongly arched 
* Mex. Leverm. 228. 1863. 
+ Hedwigia 29: 91. 1890. 
