﻿Black Thorn, Bullace Plum, Sloe 



Prunns instititia L. [Primus spinosa, var. instititia Gray] 

 flowers aud immature 



1. A twig showin 



leaves x % 



2. Flower, lateral sectional view x 2^4 



3. A branch showing mature leaves and 



fruit X % 



4. Fruit, lateral sectional view x 2 



5. Stone, lateral view x 2 

 (i. Winter twig " W, 



