532 FOREST CULTURE AND 
Poa aquatica, Linné. — It produces a large bulk of 
foliage, and may be disseminated in swamps for fod- 
der purposes. 
Poa demoralis, canes — According to Lawson no 
better grass exists for displacing weeds on pleasure- 
lawns; the same may be said of Poa compressa, L. 
Pupulus monilifera, Aiton.—It is reeommended to 
obtain, for planting along streets or near dwellings, 
only cuttings from male trees, as the minute, downy 
seeds of the female trees are copiously wafted through 
the air, and have irritant effects on the respiratory 
organs, 
Priva levis, Jussieu. — Chile and the Argentine 
Republic. A perennial herb, the small tubers of 
which can be used for food (Philippi). 
Quillaja saponaria, Molina.—Chile. A colossal tree. 
The bark is rich in saponin, and thus valuable for 
dressing wool and silk. 
Rheum officinale, Baillon. — Western China and 
Eastern Thibet, on the high table-land. It furnishes 
the most of the true Turkey rhubarb, not merely from 
the root, but also from the woody stem. Suited for 
our alps. 
Rubus geoides, Smith. — Falkland Islands, Fuegia, 
Patagonia, and Chiloe. A herbaceous kind of rasp- 
berry-plant, with greenish-yellow fruits, resembling 
the cloud-berry, and of a very agreeable taste. Best 
adapted for our alps. 
Rubus rosifolius, Smith.—Tropical and sub-tropical 
regions of Africa and Asia; also throughout the littoral 
forests of East Australia. This shrub bears, in woody 
regions, an abundance of fruits, of large size, and 
these early and long in the. season. 
