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THE SYNONYMY OF THREE AMERICAN HEPATICAE. 
Alexander W. Evans. 
The Lindenberg herbarium of Hepaticae, now preserved in the Natural 
History Museum at Vienna, is justly famous for its richness in original mate- 
rial, many of the species described in the Synopsis Hepaticarum (1844-47) 
being represented by complete or partial type specimens. During the sum- 
mer of 1907 Dr. C. von Keissler, who was then in charge of the collection, 
kindly gave me permission to examine it and to take notes upon a number of 
genera in which I was especially interested. As a result of this study I have 
reached conclusions with regard to a few species which are somewhat at vari- 
ance with those accepted by other recent writers. They disagree in fact with 
views which I myself have previously held. One of these species, Lejeunea 
unciloba Lindenb. , has already been discussed in another paper. 1 The 
three species noted below are Lejeunea laete-virens Nees & Mont., Z. 
clausa Nees & Mont., and Frullania obcordata Lehm. & Lindenb Under 
each of these it becomes necessary to reduce to synonymy one or more species , 
which are usually recognized as valid. 
Lejeunea laete-virens. 
This species was based upon Cuban specimens collected at Havana by 
Ramon de la Sagra, and in the Synopsis Hepaticarum a second specimen 
from the island of Dominica is quoted, the collector’s name being omitted. 
Stephani refers the species to the subgenus Eu-Lej eunea and cites both of 
these specimens as authentic. Both are represented in the Lindenberg 
herbarium, and upon studying them I found that they not only agreed with 
each other but that they were quite indistinguishable from the plant which I 
had recently described and figured as Microlej eunea lucens (Tayl.) Evans. 2 
Since Lejeunea lucens Tayl. was published a year later than Z. laete-virens , 
it must unfortunately become a synonym of the latter species. Another 
plant which should apparently also be reduced is Z. glaucophylla Gottsche, 
originally described from sterile material collected by Beaupertuis on the 
island of Guadeloupe. Although the type specimen is not to be found in the 
Lindenberg collection the species is represented there by another Guade- 
loupe specimen from L’Herminier, determined by Gottsche himself. This 
agrees closely with Gottsche’s description and figures of Z. glaucophylla and 
also with the specimens of Z. laete-virens. In Z. glaucophylla to be sure 
the underleaves are said to be entire on the sides whereas in Z. laete-virens 
they are sometimes unidentate. The teeth, however, are far from constant, 
and it is quite easy to select stems from a tuft of Z. laete-virens where the 
sides of the underleaves are uniformly entire. The specimens from the 
Southern States which Austin many years ago referred to Z. laete-virens 
are too fragmentary for positive determination but clearly represent some 
other species. The synonymy of Z laete-virens , as I now understand the 
species, is as follows: 
1 Torreya 7: 225-229. 1908. 
2 Bot. Gazette 1 : 36. 1876. 
