146 OTHER AMERICAN PLANTS. 



are more likely to be destroyed by the summer than 

 by the winter ; at least such has been our experience 

 at Grlen Eidge, where plants which survived two 

 winters, with little injury, perished from the effects 

 of the summer's sun. All the species are very 

 impatient of the extremes of wet and dry, and if 

 planted in full exposure to the rays of the sun soon 

 perish, and an excess of moisture at the roots is 

 sure to kill them. The best culture is to plant them 

 in a Rhododendron-bed, with a northern exposure, 

 and during winter to cover them lightly with pine- 

 needles. 



They are easily raised from seed. 



The two species in cultivation are : — 



P. MUCRONATA, 



A native of the Straits of Magellan, with dark 

 foliage, which contrasts well with the white flowers. 



Figured in Bot. Reg. 20, t. 1675 ; and in Maud. 

 Bot. 3, 112. And 



A native of Chili. The foliage is dark, and the 

 plant flowers very freely. This species seems quite 

 as hardy as the preceding. 



Figured in Bot. Reg. 26, t. 63; and in Bot. Mag. 

 t. 3889. 



There are other species which prove tender. 



