308 ROWLEE: PLANTS FROM SOUTHERN PATAGONIA 
covered with volcanic rock and present a formidable barrier to 
travel to the south. The lake Argentine valley is therefore a 
vast amphitheater in the east side of the main Cordilleras and 
apparently affords more favorable conditions for vegetation than 
any place south or immediately north of it. 
The collections from which the descriptions of Patagonia 
plants have been made are very widely separated. Collections in 
herbaria in the United States are meager and often imperfectly 
named. ‘The national herbaria of Chile and of Argentina contain 
a large amount of the material. The other principal collections 
are in the Kew Herbarium at London and the National Herbarium 
at Stockholm, Sweden. This makes it difficult to identify species 
with absolute certainty. The only works dealing with the wai 
in a synoptical way are Hooker’s Flora Antarctica, Macloskie's 
Flora of Patagonia, and Reiche’s Flora of Chile. Many mono- 
graphs and lists, however, have appeared. oe 
One of the most recent is a list of plants based on a collection 
of plants made by Pritchard and published by Rendle in the 
Journal of Botany in 1904. This collection was also made 
principally on the Burmeister Peninsula. Rendle’s list contains 
about 150 species of flowering plants, 18 of which are described as 
new species. Our list contains 166 species of flowering plants- 
We have refrained from describing as new any of our plants at 
the present time, but have instead associated each specimen with 
a name already published. Further study and particularly oppor 
tunity to compare our specimens with authentic specimens may 
warrant recognition of novelties in the collection. 
LisT OF SPECIES COLLECTED 
LICHENS 
I. CLADONIA COCCIFERA (L.) Willd. 
2. STICTA ENDOCHRYSEA Delise. 
3. NEPHROMA ANTARCTICUM (Wulf.) Nyl. 
Very closely related to N. arcticum iL.) Ba Pr. 
MOSSES 
(Determined by A. LeR. Andrews) 
4. BARTRAMIA PoMIFORMIS (L.) Hedw. var. crispa B. & S. 
