28 Early Bo tanical Explorer^ on the Pacific Coart 
Flora Sitchensis , 15 in which some of our Californian coast trees 
were named. He collected both species of Tsuga (or Pmus, as 
they were then called), one named P. Mertensiana and the other 
P. canadensis. The latter was supposed to be the same as the east¬ 
ern species. He also collected the Coast Spruce, Picea sitchensis, 
and the Coast Alder, Alnus rubra. There was confusion concern¬ 
ing the identity of Tsuga Mertensiana until Professor C. S. Sar¬ 
gent, of the Arnold Arboretum, identified it with what had been 
known in California as Tsuga Pattoniana , the lovely Hemlock 
Spruce of the Sierra Nevada. What was considered T. canadensis 
is now known as T. heterophylla. Menzies was the first to dis¬ 
cover and collect specimens of these trees, but they were named 
from the collections of Mertens. 
The Kotzebue Expedition 
The next important expedition was that sent out by the Russians 
in 1815 under Captain Otto von Kotzebue in the Rurik } which 
had been fitted out by Count Nikolai Petrovitch Romanzoff. 16 
Two eminent scientists were aboard: Adelbert von Chamisso and 
Johann Friedrich Eschscholtz. The former was of French par¬ 
entage but born and reared in Germany. Not only was he known 
as an able botanist, but also as a poet and the author of the story 
of Peter Schlemihl who sold his shadow to the devil. Eschscholtz 
was interested in all branches of natural history, especially en¬ 
tomology. They were in San Francisco, Bodega, San Jose and 
Monterey in 1816. Most of their collections were made in San 
Francisco, probably at the Presidio. Their species could be found 
there forty years ago, but have been killed by the dense forest of 
