Naturalisation in Extra-Tropical Countries. 281 



available in tbe first season already, worth now about 56s. per Ib. 

 Mr. Edw. Hulme realized 2 10s. per Ib. for oil distilled from plants 

 reared on tbe Lower Ovens-River. In tropical countries tbe 

 Lavender likes some shade. 



Lavandula latifolia, C. Bauhin. (L. Spica, De Candolle.) 



South-Europe, North-Africa. This species is the richest yielder 

 of oil. Hardy in Norway to lat. 67 56'. The Lavenders are easily 

 multiplied by slips. Seeds will keep for five years. Linnaeus com- 

 bined this and the preceding species as varieties under the name of 

 L. Spica. 



Lavandula Stcechas, Linne. 



South-Europe, North- Africa. " Topped Lavender/' This shrub 

 can also be utilised for oil-distillation and other purposes, for which 

 the two other Lavenders are used. The quality of the oil of these 

 species seems to differ according to their locality of growth. Mr. 

 James Dickinson, of Port Arlington, Victoria, informs us, that this is 

 the best plant known to him for staying sand. It grows much 

 quicker than the Ulex : every seed which falls germinates, so that 

 around each bush every stroke of the spade brings up lots of seed- 

 lings fit for transplantation. In mild regions it is five months in full 

 flower annually, coming into bloom early. Bees are passionately 

 fond of the nectar of the flowers, as noted already by Virgilius. Mr. 

 Dickinson calculates, that a ton of the finest-flavored honey can be 

 obtained annually from an acre of this Lavender. 



Lavatera arborea, Linn. 



" Tree-Mallow " of the countries on the Mediterranean Sea, extend- 

 ing northward to England, naturally often a coast-plant. A tall 

 biennial, or oftener perennial plant of rapid growth. The ribbon-like 

 bast is produced in greater abundance and more rapidly than in most 

 malvaceous plants, and is recommended for paper-material. Bears 

 frost to 15 F. [G-orlie], The Tree-Mallow might easily be natural- 

 ised on sea-shores, where it would be useful as a quick shelter. 

 Perhaps it might also serve with allied plants for green manure. 

 The bulky foliage has proved valuable for fodder, and so has that of 

 Lavatera plebeja (Sims) of Australia. Another perennial tall species 

 is L. unguiculata (Desfontaines) of South-Europe. The Chinese 

 annual or biennial Althaea rosea (Cavanilles), the Hollyhock, might 

 serve the same purposes. 



Lawsonia alba, Lamarck. 



North- and Middle-Africa, Arabia, Persia, India and North- 

 Western Australia. The " Henne or Henna-bush." It may become 

 of use as a dye-plant in regions free from frost. The orange pigment 

 is obtained from the ground foliage. Mr. C. B. Clarke considers it 



