envelopes during the formation of the fruit and seed in 
Mirabilis, Elseagnus, Morus, Fragaria, Anacardium ? 
10. Enumerate briefly the principal diseases to which 
plants are subject, their causes and probable modes of 
prevention and cure. 
11. Define the term syjeCT'es. 
12. Give the characters of the classes according to the 
Natural System. 
13. Give the characters of the orders which furnish us 
with Ipecacuanha, Rhubarb, Jalap, Belladonna, Opium, 
Peruvian bark, and Sarsaparilla. 
Describe Jigy^jl^^lante^mbered 1 to 4. 
N. B. WARD. 
