Evans: TAXILEJEUNEA PTEROGONIA 111 
- (Mitten Herbarium, specimen received from Montagne—labeled 
‘“‘Omphalanthus debilis . . . Peruvia””—but presumably collected 
by D’Orbigny in Bolivia); Yungas, June and July, 1893, P. Jay 2, 
23, 16, FTO. 
This interesting species was based on a specimen from Peru 
in the Kunze Herbarium, neither the collector’s name nor the 
definite locality being mentioned in the original description. This 
specimen was fortunately fertile and Lehmann and Lindenberg 
describe the perianth as turbinate and five-angled at the apex, 
the angles growing out into ciliate crests. Other important 
characters of their Jungermannia pterogonia did not escape 
them: they call attention to the cordate-ovate leaves, apiculate 
at the apex and often minutely denticulate in the upper part; to 
the minute lobules, which they describe as almost obsolete; to the 
cordate-orbiculate underleaves, acutely and very narrowly 
“‘emarginate’’ at the apex but otherwise entire; to the very short 
female branches; to the ‘“‘lanceolate,’’ acute, ‘‘denticulate’’ 
bracts; and to the bifid, ‘“‘serrate-denticulate’’ bracteoles. 
In the Synopsis Hepaticarum the arrangement of the perianths 
in a secund series is emphasized ; otherwise the original description 
is transcribed, almost word for word. In addition to the original 
Peruvian specimen, however, the authors cite a Mexican specimen 
under Omphalanthus plerogonius, although here again neither 
the collector’s name nor the definite locality is mentioned. 
The next allusions in the literature to T. pterogonia are ap- 
parently in the writings of Gottsche. In his ‘‘Mexikanske 
Levermosser,”’ published in 1863, he refers the Mexican specimens 
which the Synopsis had included under O. pterogonius to O. 
subalatus Lindenb. & Gottsche,* a species based on Mexican 
material from Mirador, collected by F. Liebmann.j In this 
species the perianth is described as cylindrical-turbinate and 
pentagonal at the apex, the angles being “‘subalate”’ but smooth. 
No other differential characters of much significance are brought 
out. In his chapter on the Hepaticae in Triana and Planchon’s 
“‘Prodromus Florae Novo-Granatensis,” published the following 
year, Gottsche cites the true O. pterogonius from Aserradero and 
* Kong. Dansk. Vidensk. Selsk. Skr. V. 6: 274. 1863. 
7 G. L. & N. Syn. Hep. 747. 1847. 
