similar regions; they principally differ in the following 

 particulars. P. pallida has very round blunt bracts, white 

 flowers, smaller leaves, and grows very ^veakly and unwil- 

 lingly under ordinary circumstances. P. imhricata has 

 pointed bracts, yellowish flowers with a dash of violet, very 

 long strong leaves, and grows and flowers most freely. 



Our specimens were communicated by Richard Harrison, 

 Esq., in May, 1834. 



