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from Europe to North Africa and West Asia. These and 
most other species contain in their foliage and in some other 
parts Amygdalin. Perhaps some of the species from 
Eastern Asia, California and tropical America are eligible 
for improving their fruit through horticultural skill. The 
Sloe and others might with advantage be naturalized on 
our forest streams. 
Psamma arenaria, Eoem. and Schult. 
(P. littoralis, Beauv. Galamagrostis arenaria, Roth.J 
The Moram or Marrem or Bent Glrass. Sand-coasts of 
Europe, N orth Africa and Middle N orth America. One of the 
most important of reedy grasses, with long creeping roots, 
for binding the moving drift sands on the sea shore, for the 
consolidation of which in Europe chiefly this tall grass and 
Elymus arenarius are employed Psamma Baltica, E. 
and S., from the Baltic and North Sea, serves the same pur- 
pose. Both can also be used in the manner of Sparta for 
paper material. 
Psidium Araca, Eaddi. 
Erom West India and Gruyana to Peru and Southern Brazil, 
where it is found in dry high-lying places. This is one of 
the edible Guavas, recorded already by Piso and Marcgrav. 
The greenish-yellow berry is of exquisite taste. 
Psidium arboreum, Vellozo. 
Brazil; province Eio de Janeiro. This Guava-fruit mea- 
sures about one inch, and is of excellent flavor. 
Psidium Cattleyanum, Sabine.* 
The Purple Guava. Brazil and Uruguay. One of the 
hardiest of the Guava-bushes, attaining finally a height of 
20 feet. The purple berries are seldom above an inch long, 
but of delicious flavor and taste, resembling thus far 
strawberries. P. huxifolium, Nutt., of Elorida, seems nearly 
related to this species. 
Psidium cinereum, Martins. 
Brazil ; provinces Minas Geraes and Sao Paulo. Also 
yielding an edible fruit. 
