MICROSCOPIC STRUCTURE OF WEED SEEDS 587 



UMBELLIFERAE. 



Harz, C. D. See Landwirthschaftliche Samenkunde. 2 :1030-1063. 

 Winton, A. L. Anatomy of the seeds of wild carrot. Microscopy 

 of vegetable products. 158-159. 



URTICACEAE. 



Harz, C. D. See Landwirthschaftliche Samenkunde. 2 :978-982. 

 Winton, A. L. The anatomy of certain oil seeds with especial 



reference to the microscopic examination of cattle foods. Conn. 



Agr. Exp. Sta. 1903. 175-180. 



Microscopy of vegetable products. 212-217. 



