EUCALYPTUS TREES. 323 
Lawsonia alba, Lamarck.—North and Middle Afri- 
ca, Persia, Arabia, India, and North-western Austra- 
lia. The Henne or Henna-bush. It may become of 
use as a dye-plant in parts of our colony free of frost. 
The orange pigment is obtained from the grinded 
foliage. 
Lavatera arborea, L.—Tree-Mallow of Middle Eu- 
rope and the countries about the Mediterranean Sea. 
A. tall, biennial plant of rapid growth. The ribbon- 
like bast is produced in greater abundance than in 
most other malvaceous plants. The Tree- Mallow 
might easily be naturalized on our shores. Perhaps 
it might serve with allied plants for green manure. 
‘ Leersia oryzoides, Swartz.—Middle and South Eu- 
rope, various parts of Asia, Africa, and America. A 
perennial nutritious swamp - grass. Other Leersias 
from both hemispheres are deserving of introduction. 
Lepidium sativum, L.— The Cress. Orient. An- 
nual. Irrespective of its culinary value, Cress is of 
use as one of the remedies in cases of scurvy. <Active 
principle : A volatile oil and the bitter Lepidin. 
Lepidosperma gladiatum, La Billard. —The Sword- 
Sedge of the sea-coasts of extra-tropic Australia. One 
of the most important plants for binding sea- sand ; 
also yielding a paper material as good as Sparta. 
Leptospermum levigatum, F. v. M. (Fabricia lee- 
vigata, Gaertner.) —The ‘ Sandstay.’’ Sea- shores 
and sand - deserts of extra - tropic Australia, but not 
extending to Western Australia. This shrub or small 
tree is the most effectual of all for arresting the prog- 
ress of drift-sand in a clime like ours. It is most 
easily raised by simply scattering, in Autumn, the 
seeds on the sand and covering them loosely with 
boughs, 
