420 William Russel Dudley 



H :— (i)Embryo of mature seed (Ph. Scouleri), X 5- 



(2) The same in longisection ; hyp., winged hypocotyl ; cot., cot- 

 yledon, inside the first leaves of young plant. 



J : — Diagram ; transection of young anthers on staminate spadix (Ph. 

 Torreyi), showing wall between pollen sacs. 



K : — " Fin-cells " near the margin and tip of a very young leaf, X 120. 



L, : — Transection of leaf (Ph. Torreyi), showing epidermis ; areas of 

 sclerenchyma cells, sc, and parenchyma, X 600. 



M :— Stem (Ph. Torreyi), X 5oo. 



(i) f-v-b, fibro vascular bundle in transection, surrounded by an 

 endodermis. 



(2) Longisection of same, showing annular spiral vessels, soft 

 bast, and parenchyma. 



(3) Below, a transection of stem near the epidermis, the large 

 areas of sclerenchyma, sc. 



(4) Single sclerenchyma fibre, sc, surface view. 



R : — Transection of root (Ph. Torreyi), near epidermis, ep ; sheath of 

 strong, thick-walled hypodermal cells below, X 600. 



