No 11 
BULLE TEN. 
TORREY BOTANICAL CLUB 
NOVEMBER, 1907 
Hepaticae of Puerto Rico 
Vill, SYMBIEZIDIUM, MARCHESINIA, MASTIGOLEJEUNEA, CAUDALE- 
JEUNEA, AND BRYOPTERIS 
ALEXANDER WILLIAM Evans 
(WITH PLATES 31-33) 
SYMBIEZIDIUM 
The authors of the Synopsis Hepaticarum divided the genus 
Lejeuneainto the three sections Phragmicomotdeac (with 38 species), 
Typicae (with 225 species), and Ceratanthae (with 29 species).* In 
hese sections they included all the species which they referred to 
the genus, with the exception of a few which were incompletely 
Nown. Apparently the first attempt to segregate this vast group 
S made by Trevisan in 1877.+ His method was very simple 
nd consisted in the elevation of the three sections to generic rank. 
the first he gave the name Symbiezidiuin, for the second he 
etained the name Lejeunea, for the third (as already noted by the 
riter in another connection) he revived the old generic name 
Colura of Dumortier. For some reason the genus Symbiesidiuim 
is been virtually ignored by subsequent writers, perhaps because 
revisan’s compilation was so soon followed by the thorough and 
ate and includes species which would now be distributed among 
ten recognized genera. Neither of these reasons is sufficient to 
* 
L. ¢. 308-410. 1845; 748-770. 1847. 
_ T Schema di una nuova classificazione delle epatiche. Mem. Ist. Lomb. III. 4: 
451. 1877, 
ae BULLETIN for October, 1907 (34: 491-532, pi. 25-370) was issued 17 D- 
907. 
533 
