86 ADDITIONS 
Poa Canadensis, Beauvois. 
The Rattlesnake grass of North-East America. A valuable 
swamp grass. 
Polygala crotalaroides, Hamilton. 
Temperate Himalaya. Praised as an ophidian alexipharmic. To 
seveial other species both of the eastern and western hemispheres 
similar properties are ascribed, but we are almost entirely with- 
out any reliable medical testimony on these and many other 
vegetable antidotes against snake poison. 
Polygaster Sampadarins, Fries. 
South Eastern Asia. One of the most palatable of all truffles. 
Polygonum tinctorium, Loureiro. 
Japan and China. An annual herb, deserving attention and 
local trials here, as yielding a kind of Indigo. Its growth would 
be vigorous. 
Prunus ilicifolia, Nuttall. 
California. In deep rich soil valuable for evergreen hedges of 
intricate growth. 
Prunus Mahaleb, Linne. 
Middle and South Europe. It deserves some attention on account 
of its scented seeds and also odorous wood, the latter used in 
turnery for pipes and other articles. 
Psidium acidum, Martius. 
Higher regions on the Amazon river. A tree, 30 feet high ; its 
guava fruit pale yellow and of apple size. 
Psidium ohrysophyllum, F. von Jlueller. (Abbevillea chnso- 
phylla, Berg.) 
TheGuabiroba do mato of South Brazil. This tree attains also 
a height of about 30 feet. The fruit generally not larger than a 
cheriy Perhaps other species of the section Abbevillea would be 
hardy here and worthy of cultivation. 
Psidium lineatifolium, Persoon. 
Mountains of Brazil. Berry about 1 inch diameter. 
Psidimn inalifolium, F. v. Mueller, (Campomanesia malifolia, 
Uruguay. Berry about one inch diameter. 
Pterocarpus Indicus, Roxburgh. 
S ^ons L famed° f f Ch i tla fl and A *"* ° £ c <™iderable dimen- 
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