Transcriber's Notes:

1. Inconsistencies in hyphenation have been retained from the original (where both are acceptable usage).

2. Inconsistencies in the use of capitalisation and spelling within botanical names have been retained from the original (where both are acceptable usage).

3. Punctuation has been normalised.

4. Page numbering format in the index has been standardised.

5. Some mid-paragraph illustrations have been moved to the nearest paragraph break, and are linked accordingly.

6. The remaining corrections made are indicated by dotted lines under the corrections. Scroll the mouse over the word and the original text will appear.